# Patent

## Title
Non-toxic corrosion-protection pigments based on manganese

## Abstract

Corrosion-inhibiting pigments based on manganese are described that contain a trivalent or tetravalent manganese/valence stabilizer complex. An inorganic or organic material is used to stabilize the trivalent or tetravalent manganese ion to form a compound that is sparingly soluble, exhibits low solubility, or is insoluble in water, depending upon the intended usage. Specific stabilizers are chosen to control the release rate of trivalent or tetravalent manganese during exposure to water and to tailor the compatibility of the powder when used as a pigment in a chosen binder system. Stabilizers may also modify the processing and handling characteristics of the formed powders. Manganese/valence stabilizer combinations are chosen based on the well-founded principles of manganese coordination chemistry. Many manganese-valence stabilizer combinations are presented that can equal the performance of conventional hexavalent chromium or tetravalent lead systems. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 C.F.R. §1.72(b).

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional of U.S. patent application Ser. No. 10/341,435 filed Jan. 13, 2003 NON-TOXIC CORROSION-PROTECTION PIGMENTS BASED ON A MANGANESE (now abandoned).
This application is related to commonly assigned U.S. patent application Ser. No. 10/341,556 NON-TOXIC CORROSION-PROTECTION PIGMENTS BASED ON PERMANGANATE AND MANGANATE, filed Jan. 13, 2003 by Sturgill et al., the disclosure of which is incorporated herein by reference (now abandoned).


BACKGROUND OF THE INVENTION
This invention relates generally to compositions and methods for the formation of protective, corrosion-inhibiting pigments without the use of chromium in the hexavalent oxidation state or lead in the tetravalent oxidation state. More particularly, this invention relates to non-toxic, corrosion-inhibiting pigments based on trivalent and tetravalent manganese and methods of making and using the same.
Inhibiting the initiation, growth, and extent of corrosion is a significant part of component and systems design for the successful long-term use of metal objects. Uniform physical performance and safety margins of a part, a component, or an entire system can be compromised by corrosion. Aluminum, zinc, iron, magnesium, titanium and their alloys tend to corrode rapidly in the presence of water due to their low oxidation-reduction (redox) potentials. The high strength 2000 and 7000 series of aluminum alloys are used extensively in aircraft and are very sensitive to corrosive attack. Materials such as steels and carbon fibers with higher redox potentials will form a galvanic couple in water and promote corrosive attack when located near light metal alloys such as aluminum.
A bare metal surface or one that has been conversion coated, phosphated, sealed, rinsed, or otherwise treated will be protected by the application of a primer paint with a corrosion inhibiting pigment. As used herein, the term “pigment” means chemically active compounds with the ability to inhibit corrosion at a distance, rather than simple colorants or opacifiers. Oxidative compounds that are effective as corrosion inhibitors tend to be highly colored and/or opaque. An effective corrosion inhibiting pigment has throwing power and can protect exposed base metal in a scratch or flaw by oxidizing and passivating it at a distance during aqueous corrosion when dispersed in a suitable carrier phase. These compounds are usually solids or liquids that are typically dispersed in a liquid carrier or binder system such as a paint or wash. These compounds may also be used to help inhibit corrosion without a significant liquid carrier using an integral binder and/or a low-volatile application method. Barrier layer formers such as sol-gel coatings or polymeric films are also used, but they tend to have no inherent oxidizing character and no appreciable throwing power and fail to protect the metal surface when the film is breached.
Pigments that contain hexavalent chromium (CrVI) compounds are the de facto standard for high-performance corrosion inhibiting paints and coatings for metal protection and are a typical corrosion inhibitor used to protect aluminum, zinc, magnesium, iron, titanium, copper and their alloys. Zinc (C.I. Pigment Yellow 36) and strontium (C.I. Pigment Yellow 32) chromate pigments are typically used, although higher-solubility calcium and magnesium chromates have also seen some limited use as pigments. The coating vehicles of these pigments include alkyd-type primers, acrylic primers, and elastomeric sealants, among others. Some transition metal chromate pigments (e.g., complexed with copper, iron, manganese, or cobalt) and organic chromate pigments (e.g., bound with nitrogenous compounds such as guanidinium) have been used in protective coating systems. Barium or lead chromates have also been used as corrosion inhibitors, as well as colorants. Variations in chromate speciation (i.e., what the chromate ions are bound to) will result in significant differences in protection when used as corrosion-inhibiting pigments, due to differences in chromate solubility.
A clear correlation between performance and solubility of chromate pigments has been shown. However, oxidizing chromates can be dangerous to use as corrosion inhibitors if they are not delivered in sufficient quantity in a timely manner to the location of a coating breach. The chromate composition was far more important to the corrosion inhibiting performance of the primer film than the organic coating composition.
A principle use of zinc and strontium chromate pigments is in wash- or etch-primer formulations for aluminum protection. Wash- or etch-primers, which have been used since the 1940s, represent one of the harshest application conditions for chromate pigments. Wash-primers are applied to metal surfaces under acidic conditions where the primer is cured as a corrosion inhibiting film. Chromate pigment powders dispersed in an alcohol/resin base mixture are combined with an aqueous phosphoric acid diluent solution. The acid roughens the metal surface and initiates cross-linking of the resin to form a pigment-filled polymeric film. The chromate pigment may also be dispersed in other carriers that are not as harsh as the wash primer. However, if a corrosion-inhibiting pigment can survive the harsh conditions of acid diluent, then it can usually be successfully incorporated within other paint, polymeric, or barrier film systems for corrosion inhibition.
An important use of chromate pigments is in coil coating formulations for steel, zinc-coated steel, or aluminum sheet stock. Coil coatings can represent a challenging application environment for pigments in that cure temperatures for these paints can exceed 100 C. Corrosion-inhibiting pigments for these applications must exhibit both throwing power to inhibit corrosion and be thermally stable at elevated temperatures when incorporated into the paint.
Lead chromate pigments of various compositions are mostly used as colorants, although they are also used for corrosion protection, albeit often for different applications than zinc or strontium chromates. This is necessitated by the much lower solubility of lead chromate in comparison to these other chromates. The dark yellow lead chromate (PbCrO4, C.I. Pigment Yellow 34) exhibits a solubility of approximately 10−7 moles/liter Cr+6, whereas the darker basic lead chromate (PbCrO4.PbO, C.I. Pigment Orange 21) exhibits slightly lower solubility in water. In addition, lead chromate can be combined with other lead compounds to alter the spectral or solubility characteristics. For example, the lemon yellow lead silicochromate (PbCrO4.PbSiO3) and reddish lead molybdate-chromate (PbCrO4.PbMoO4, C.I. Pigment Red 104) are representative examples. [Note: This same situation exists for zinc chromate pigments such as ZnCrO4, ZnCrO4.Zn(OH)2, and ZnCrO4(OH).Zn(OH)2, wherein increased basicity leads to lowering of the solubility.]
While lead chromate can be used in some of the same coating vehicles as zinc or strontium chromate (i.e., alkyd-type primers), the much lower solubility of lead chromate permits its use in binder systems for which zinc or strontium chromate would be unsuitable. For example, lead chromate is often used in oil-based paints (i.e., linseed oil) wherein greater than 75% by weight of the paint system is pigment. The mechanistic action of the divalent lead ion present in the lead chromate pigments is discussed below.
Pigments that contain tetravalent lead (PbIV) are also used extensively in coatings for metal protection, especially for steels and cast irons. The most notable PbIV pigment is red lead (Pb3O4, C.I. Pigment Red 105). Red lead is compositionally equivalent to lead plumbate [(Pb2+)2(PbO44−)], wherein only one of the constituent lead atoms is in the tetravalent oxidation state, while the other two are present as the more common divalent species. The PbVI solubility for this compound is a remarkably low 10−17 moles/liter Pb+4 (Glasstone, J. Chem. Soc. 121: 1456-69, 1922), implying an extremely low release rate of PbIV. Red lead is used primarily in alkyd-type primers as well as oil-based paints such as those containing linseed oil.
Calcium plumbate (Ca2PbO4, CaldioxTM) is another representative example of a corrosion-inhibiting pigment containing PbIV. Due to its higher solubility in comparison to red lead, calcium plumbate is most frequently used for applications where a quicker release of oxidizing ions is necessary for protection, such as on galvanized steel. Calcium plumbate is most frequently used in alkyd-type or acrylic primers.
The use of hexavalent chromium or tetravalent lead pigments allows a broad range of service conditions to be addressed by tailoring the solubility of the pigment to the application needs. Very low solubility pigments, such as red lead, employ other corrosion-inhibiting mechanisms in addition to oxidative passivation. The divalent lead ions present in red lead (and even lead chromate) have been observed to form “lead soaps” after long storage when the pigment is used in conjunction with oil paints, especially those comprised of linseed oil. “Lead soaps” are reaction products between the alkaline divalent lead ions and the long-chain carboxylic acids present (i.e., oleates, linoleates, linolenates, palmitates, and stearates). This indicates that even though these pigments exhibit low solubility in water, the constituent ions are still chemically active, but less than their more soluble cousins. The divalent lead ions form insoluble compounds with corrosive anions such as sulfate, and low-solubility compounds with other corrosive ions such as chloride, thereby effectively removing them from the corroding system. For the heavier, more insoluble lead pigments such as red lead and basic lead chromate, the inhibiting action is due to both the oxidative tetravalent lead or hexavalent chromium ions, and the ability of the divalent lead ions to ‘capture’ (insolubilize) corrosive anions such as sulfate.
Significant efforts have been made in government and industry to replace CrVI and PbIV with other metals for corrosion-inhibiting applications due to toxicity, environmental, and regulatory considerations. An effective replacement for hexavalent chromate or tetravalent lead pigment needs to have throwing power for self-healing coating breeches. Throwing power is the ability of a highly oxidized ion, such as hexavalent chromium or tetravalent lead, to oxidize and passivate the exposed bare metal in a small scratch or flaw.
A number of materials have been introduced as corrosion-inhibiting replacement pigments for tetravalent lead- or hexavalent chromium-based compounds. Commercially available corrosion inhibiting pigments including compounds such as molybdates, phosphates, silicates, cyanamides, and borates that have no inherent oxidizing character have been used as alternatives to chromate pigments. Coatings that contain these materials can effectively inhibit corrosion as barrier films until the coating is breached, as by a scratch or other flaw. Films or coatings that do not contain oxidizing species can actually enhance corrosion on a surface after failure due to the effects of crevice corrosion.
Manganese is one non-toxic, non-regulated metal which has been considered as a chromium or lead replacement. Manganese (like chromium or lead) exhibits more than one oxidation state (Mn+2, Mn+3, and Mn+4). In addition, the oxidation-reduction potential is comparable to that of CrVI or PbIV in acidic solutions. For example, in acid solution:
















Mn+3 + e−   Mn+2
+1.49 V



Mn+4 + e−   Mn+3
+1.65 V



Cr+6 + 3e−   Cr+3
+1.36 V



Pb+4 + 2e−   Pb+2
+1.70 V










The MnIV and MnIII ions are very good oxidizing species with oxidation-reduction potentials of +1.65, V and +1.49, V (at pH 0), respectively. The hydroxyl and oxygen liberated from water when MnIV or MnIII is reduced will oxidize nearby bare metal. This results in a passivated metal surface if sufficient oxygen is released. The potential required to reduce tetravalent or trivalent manganese to divalent manganese is only 0.29 or 0.13 volts greater than that needed to add three electrons to reduce CrVI to trivalent chromium (CrIII). Although neither MnIV or MnIII match PbIV in terms of redox potential, neither is significantly lower and so comparable passivation of metal is achieved. MnII is formed during corrosion inhibition by the oxidation of base metal in the presence of MnIV or MnIII and water. MnII is similar to CrIII in that neither is particularly effective as redox-based corrosion inhibitors.
A number of pigments using manganese have been reported in the literature over the years, but none approach the general performance or utility of PbIV- or CrVI-based pigments. For example, Manganese Violet is a colorant composed of MnII pyrophosphate with no oxidizing characteristics.
A number of compounds have been described as corrosion-inhibiting agents, including organic mercapto and thio compounds, cyclic tetraaza compounds, aminophosphonic acid, and triazinedithiols and triazinetrithiols. Other compounds have been described as corrosion inhibiting when complexed with manganese, typically in the divalent charge state. Among these compounds are porphyrin derivatives, tetraaza organic compounds, phosphoric and phosphonic acids, naphthenates, amidosulfonic acids, and amino acids. However, the pigments formed from these compounds provide only limited corrosion protection and do not approach the benefit derived from the use of hexavalent chromium.
In addition, the formation of manganese-containing pigments in which the manganese is complexed with ligands such as hydrazones, —O bidentates, azomethines, phthalocyanines, azo and disazo complexes, N—S bidentates, oximes, tetraaza complexes, porphyrins, 1,2-dithiolates, and semicarbazones, has also been described. However, these compounds do not use tetravalent or trivalent manganese and are not used for anticorrosive applications.
U.S. Pat. No. 6,416,868 to Sullivan, et al. describes the use of alkaline earth-manganese oxides as pigments, wherein the alkaline earth is selected from Mg, Ca, Sr, and Ba. The pigments are described as being colorants and as resisting heat build-up due to infrared reflectance. Corrosion inhibiting characteristics of these compositions are not discussed or claimed. Additional manganese-containing colorants, frits, and ceramic pigments with no discussed or claimed anticorrosive properties are identified in U.S. Pat. Nos. 4,159,207 to Nuss, 3,832,205 to Lowery, and 5,254,162 to Speer, et al., and German Patent Nos. DE 41 31 548 and DE 40 02 564, both to Speer, et al.
U.S. Pat. No. 4,469,521 to Salensky describes a corrosion-inhibiting pigment formed by sintering manganomanganic oxide (Mn3O4) with oxides of calcium, zinc, barium, magnesium, or strontium.
U.S. Pat. No. 4,388,118 to Eppler describes a corrosion-inhibiting black pigment formed by calcining calcium or strontium oxides or carbonates with manganese oxides. The formed calcium manganese oxide or strontium manganese oxide pigments have very low oil absorption and high tint strength.
German Patents Nos. 26 42 049, 28 15 306, and 26 25 401 to Hund, et al. describe the use of calcined calcium/iron/aluminum/manganese oxides as corrosion-inhibiting pigments.
Manganese oxides themselves have been described as being constituents in corrosion-inhibiting formulations. For example, U.S. Pat. Nos. 4,417,007 and 4,417,008 to Salensky, et al. as well as Belgian Patent Nos. BE 893,677 to Chopra, et al. and BE 893,676 to Salensky, et al. describe manganomanganic oxide (Mn3O4) as a constituent in a solvent-based paint formulation comprised of resin binders and additional extenders, fillers, and solvents. Manganese dioxide (MnO2) is also described as an anticorrosive constituent within formulations in French Patent No. 2,348,257 to Zatmann and German Patent No. DE 39 35 478 to Ortlepp.
U.S. Pat. No. 4,788,411 to Skinner describes a paint composition described to prevent corrosion of welds. This composition is described as being composed primarily of zinc dust, with manganomanganic oxide (Mn3O4) and organic binder included. The zinc pigment is described as being especially important for corrosion protection.
To date, no truly effective replacements have been developed for pigments based on CrVI or PbIV. Accordingly, the need remains for improved corrosion-protective pigments composed of currently unregulated and/or nontoxic materials which have an effectiveness, ease of application, and performance comparable to current CrVI or PbIV pigment formulations, and for methods of making and using the same.
SUMMARY OF THE INVENTION
This need is met by the present invention which represents a significant improvement in the formulation of non-toxic pigments through the use of trivalent or tetravalent manganese. Although the present invention is not limited to specific advantages or functionality, it is noted that the trivalent and/or tetravalent manganese pigments of the present invention have been demonstrated with accelerated corrosion testing to retard corrosion to a higher degree than prior art manganese pigments and other alternatives to CrVI- or PbIV-based corrosion inhibiting pigments. These pigments have been tested to inhibit corrosion to the same degree as zinc, strontium, and lead chromate-based CrVI pigments, as well as red lead or calcium plumbate Pb IV pigments. The raw materials are not exotic, are relatively inexpensive, and do not require complicated synthesis methods.
The present invention utilizes “valency stabilization” of the trivalent or tetravalent manganese ion in the as-formed pigments to achieve corrosion resistance comparable to the more soluble chromate-based CrVI pigments. More specifically, in order to achieve a high degree of corrosion resistance, a MnIII-based or MnIV-based pigment must exhibit the following characteristics:
1) A corrosion inhibiting pigment must contain a suitable source of oxidizing species. These species quickly oxidize bare metal and form a protective surface if bare metal is exposed in a coating breach.
2) A valence stabilizer for the trivalent or tetravalent manganese ion is necessary to ensure that the ion will not be reduced too quickly to the divalent state when released into solution or in the coating. The importance of stabilizing the manganese ion in its trivalent or tetravalent charge state was not previously recognized as critical to the corrosion inhibiting function of a pigment.

3) The MnIII or MnIV pigment powder must be a “sparingly soluble”, “low solubility”, or “insoluble” compound in water when dispersed in its binder-carrier system. If the pigment is too insoluble in a selected coating system that requires inhibitor release, an insufficient amount of corrosion inhibitor will be delivered to a flaw. A poorly formed, incomplete oxide layer produced by a pigment of too low solubility for a given binder-carrier system will not only fail to inhibit corrosion, but can promote crevice corrosion and result in locally enhanced corrosion rates.

The reservoir of oxidizing ions can be quickly flushed away if the pigment is too soluble, and typical corrosion will begin. Highly soluble pigments are also known to result in osmotic blistering of paint films and coatings. Trivalent or tetravalent manganese pigments that are too soluble can also be responsible for osmotic blistering depending on the aqueous permeability the carrier film.
It is difficult to place specific solubility values to these optimum “sparingly soluble”, “low solubility”, or “insoluble” pigment materials because there appear to be several variables associated with what makes an optimum anticorrosive pigment material (e.g., specific resin/binder system in which it is placed). The particle size and particle shape has been observed to noticeably affect the solubility of “low solubility” pigments such as lead chromate (e.g., May and Kolthoff, J. Phys. & Colloid Chem. 52: 836-54, 1948). The solubility of the candidate trivalent or tetravalent manganese pigment must be matched to the hexavalent chromium or tetravalent lead pigment that it is replacing (Table 1), such as zinc or strontium chromate, or calcium plumbate. If the trivalent or tetravalent manganese pigment exhibits a solubility in water of between about 1×10−4 and about 1×10−1 moles per liter of trivalent or tetravalent manganese sparingly soluble, then appreciable corrosion inhibition will be observed in the binder systems that typically incorporate zinc or strontium chromates (or calcium plumbate). Pigments that incorporate stabilized trivalent or tetravalent manganese compounds that fall outside of this particular range may also exhibit some corrosion inhibition as zinc or strontium chromate (or calcium plumbate) replacements. For example, pigments with solubilities as high as 1×100 moles per liter or as low as 1×10−5 moles per liter of trivalent or tetravalent manganese at standard temperature and pressure (about 25° C. and about 760 Torr) will exhibit some corrosion resistance in binder systems that currently incorporate zinc or strontium chromate (or lead plumbate), although not as great as those compounds which fall within the optimum solubility range. A solubility range from 1×10−6 to 1×10−8 moles per liter trivalent or tetravalent manganese low solubility is desirable for manganese pigments to inhibit corrosion in binder systems where lead chromate pigments are currently used. Pigments that incorporate trivalent or tetravalent manganese that fall slightly outside of this range may also inhibit corrosion as lead chromate replacements. For example, pigments with solubilities as high as 1×10−5 moles per liter or as low as 1×10−9 moles per liter of trivalent or tetravalent manganese at standard temperature and pressure (about 25° C. and about 760 Torr) insoluble will exhibit some corrosion resistance in binder systems that currently incorporate lead chromate, although not as great as those compounds which fall within the optimum solubility range. Lastly, any trivalent or tetravalent manganese pigment that exhibits a solubility lower than 1×10−9, but higher than 1×10−17 (based on red lead solubility) moles per liter of trivalent or tetravalent manganese at standard temperature and pressure (about 25° C. and about 760 Torr) will exhibit some corrosion resistance in binder systems that currently incorporate red lead. Under special conditions (i.e., very carefully controlled particle sizes), trivalent or tetravalent manganese compounds with solubilities as high as 1×10−7 moles per liter trivalent or tetravalent manganese can be used as red lead replacements. The solubility characteristics of the trivalent or tetravalent manganese in the pigment can be controlled through the use of valence stabilizer materials that form compounds that fall within the desired solubility ranges. A “controlled release” of trivalent or tetravalent manganese can thus be achieved similar to the “timed release” of hexavalent chromium or tetravalent lead in the “state-of-the-art” systems.







TABLE 1







Solubility Ranges for Trivalent and/or Tetravalent Manganese


Replacements for Hexavalent Chromium or


Tetravalent Lead Pigments










Optimum Solubility



Hexavalent Chromium or
Range
Acceptable Solubility


Tetravalent Lead Pigment
(moles/L Mn+3
Range (moles/L Mn+3


to be Replaced
and/or Mn+4)
and/or Mn+4)





Zinc Chromates (including
1 × 10−1 (upper)
1 × 100 (upper)


basic forms)
to
to


Strontium Chromates
1 × 10−4 (lower)
1 × 10−5 (lower)


Calcium Plumbate


Lead Chromates (including
1 × 10−6 (upper)
1 × 10−5 (upper)


basic forms)
to
to


Lead Molybdate-Chromate
1 × 10−8 (lower)
1 × 10−9 (lower)


Lead Silicochromate


Red Lead
1 × 10−9 (upper)
1 × 10−7 (upper)



to
to



1 × 10−17 (lower)
1 × 10−17 (lower)









4) The “valence stabilizer” optionally helps establish an electrostatic barrier layer around the cation-stabilizer compound in aqueous solutions. The nature and character of the electrostatic double-layer surrounding the cation-stabilizer compound may be controlled and modified by careful selection of stabilizer species. In general, the electrostatic double layer formed acts to protect the cation from premature reaction with hydronium, hydroxide, and other ions in solution. The formation of electrostatic barrier layers also helps to impede the passage of corrosive ions through the binder phase to the metallic surface.

5) The trivalent or tetravalent manganese pigment material may also exhibit ion exchange behavior towards corrosion promoting ions, particularly alkali species. This optional consideration can be important because alkali ions are aggressive aqueous corrosion enhancers in alloys which contain metals such as aluminum, magnesium, or zinc.

6) The manganese/valence stabilizer complex can optionally exhibit a color change between the trivalent or tetravalent and divalent manganese oxidation states. This color change can act as a metric to determine when the “throwing power” associated with the pigments is no longer available, and when the paint system in which it is contained needs to be replaced. For this reason, it is also optionally important that the color of these pigments that exhibit a color change between divalent and trivalent or tetravalent oxidation states that is light-fast (i.e., not changed by strong light).

The effectiveness of an oxidizing species is a function of its individual oxidation-reduction potential, and more highly oxidized species exhibit greater corrosion protection, although lower stability. A stabilizer is necessary to provide a timed release of the inhibitor ion, as well as being needed to ensure that the oxidative strength will not be reduced too rapidly. Thus, a valence stabilizer is required for the trivalent or tetravalent manganese ion because of its reactivity and to produce controlled trivalent or tetravalent manganese solubilities. The corrosion resistance of a number of aluminum alloys as tested using both ASTM B-117 and ASTM G-85 has been enhanced through the use of stabilized trivalent and/or tetravalent manganese pigments. Not only do these optimized pigments retard corrosion to a higher degree than other prior art manganese pigments, but their corrosion resistance is comparable to that of hexavalent chromium or tetravalent lead systems.
In one aspect, the invention comprises a mechanistic and chemical approach to the production of corrosion-inhibiting pigments using trivalent or tetravalent manganese. This approach uses stabilizer materials which form compounds with trivalent or tetravalent manganese that match the observed solubilities of hexavalent chromium or tetravalent lead pigments currently in use (see Table 1). The solubility ranges reported provide a release of trivalent or tetravalent manganese at a rate slow enough that most binder systems will provide protection for an extended period of time and fast enough to inhibit corrosion during conventional accelerated corrosion testing methods such as ASTM B-117 and G-85. Compounds that fall slightly outside of the solubility ranges shown in Table 1 may also provide some corrosion-inhibiting activity under certain conditions and binder systems. However, pigment compounds with aqueous solubilities far outside of the target ranges are likely to be inefficient corrosion inhibitors. Solubility control can be achieved using organic or inorganic stabilizer materials.
In an optional aspect, the invention is the achievement of corrosion-resistant pigments using trivalent or tetravalent manganese by the use of stabilizer materials which form compounds that exhibit electrostatic dipoles to form electrostatic barrier layers composed of ions such as hydronium (H3O+) or hydroxide (OH−) in the presence of water. The formation of these electrostatic barrier layers through the use of stabilizer materials can be achieved using organic or inorganic materials.
In another optional aspect, the invention is the achievement of corrosion-resistant pigments using trivalent or tetravalent manganese by the use of stabilizer materials which form compounds that exhibit ion exchange behavior towards alkali ions. The formation of this ion exchange behavior can be achieved through the use of organic or inorganic materials.
In yet another optional aspect, the decomposition temperature of the trivalent or tetravalent manganese/valence stabilizer complex upon which the pigment is based should be above 100° C. In addition, the melting temperature of the complex is typically above 50° C., although lower-melting complexes may have some applications.
In still another optional aspect, the manganese/valence stabilizer complex upon which the pigment is based should exhibit a color change between the trivalent or tetravalent and divalent oxidation states. This allows for a visual metric of when the pigment has lost its “throwing power”, and the binder system within which it is contained must be replaced. Therefore, it is desirable that the color of these pigments be light-fast (unchanged by exposure to strong light).
These MnIII and MnIV compounds represent a substantial performance improvement over prior art related to pigment alternatives used to replace CrVI-based and PbIV-based corrosion inhibiting pigments. They also provide a capability to tailor the corrosion inhibiting pigment to the carrier system. This allows current binder/resin systems used for chromates or plumbates to be used for MnIII- or MnIV-based systems without modification. Likewise, new binder/carrier/resin systems with improved physical properties can be developed without the restriction of compatibility with zinc, strontium, or lead chromate; or plumbate pigments.
The raw materials needed for the solutions used to form these coatings are relatively inexpensive. The pigments do not use exotic materials or require complicated synthesis methods.
Accordingly, it is an object of the present invention to provide non-toxic, corrosion-protective pigments based on trivalent or tetravalent manganese and for methods of making and using the same. These and other objects and advantages of the present invention will be more fully understood from the following detailed description of the invention. It is noted that the scope of the claims is defined by the recitations therein and not by the specific discussion of features and advantages set forth in the present description.


DETAILED DESCRIPTION OF THE INVENTION
A. Starting Materials
Four general starting materials are used for the preparation of trivalent or tetravalent manganese corrosion-inhibiting pigments. These include a manganese source, an oxidation source (if the precursor is a divalent manganese salt), a valence stabilizer source, and optional additional solubility control agents.
1) Manganese Source
Manganese is a nontoxic, non-regulated replacement metal for chromium or lead that exhibits more than one oxidation state (MnII, MnIII, and MnIV). The oxidation reduction potential for MnIII-MnII is comparable to that of the CrVI-CrIII couple, and the oxidation-reduction potential for MnIV-MnIII is comparable to the PbIV-PbII couple. The ionic radii of MnIII (61 pm) and MnIV (54 pm) are slightly larger than the CrVI ion (44 pm), and they will have a correspondingly lower charge density (electrostatic field) per ion as compared to hexavalent chromium. Conversely, both MnIII and MnIV are smaller than PbIV (78 pm), and have a higher charge density (electrostatic field) per ion compared to tetravalent lead. These factors are important in the selection and design of trivalent or tetravalent manganese compounds that match or exceed the performance of hexavalent chromium or tetravalent lead pigments.
Unlike most other high valence metal (HVM) systems, trivalent and/or tetravalent manganese ions exhibit remarkable stability under many environmental conditions. The numerous examples of manganese minerals that contain MnIII or MnIV are evidence of this stability (see Table 2 below). Trivalent or tetravalent manganese-containing minerals could conceptually be used as corrosion-inhibiting pigments. (However, natural impurities contained therein would alter the compositions so that the pigment materials would exhibit altered solubility characteristics.) The trivalent or tetravalent manganese minerals shown in Table 2 could be used as precursors for the production of anticorrosive manganese pigments for lead chromate or red lead replacements.







TABLE 2







Naturally-Occurring Trivalent and/or Tetravalent Manganese-Containing


Minerals Useful as Feedstock for Anticorrosive Manganese


Pigment Production











Approximate
Manganese



Mineral
Composition
Valence State(s)
Crystal Structure





Pyrolusite
MnO2
+4
Tetragonal


Hausmannite
Mn3O4
+3/+2
Tetragonal


Manganite
MnO(OH)
+3
Tetragonal


Ramsdellite
MnO2
+4
Orthorhombic


Bixbyite
Mn2O3
+3
Cubic


Groutite
MnO(OH)
+3
Orthorhombic


Feitknechite
MnO(OH)
+3
Tetragonal


Akhtenskite
MnO2
+4
Hexagonal


Buserite
MnO2
+4
Unknown


Nsutite
Mn(O,OH)2
+4/+3
Hexagonal


Hetaerolite
ZnMn2O4
+3
Tetragonal


Marokite
CaMn2O4
+3
Orthorhombic


Hydrohetaerolite
HZnMn2−xO4
+3/+2
Tetragonal


Braunite
Mn7SiO12
+3/+2
Tetragonal


Psilomelane (aka
(Ba,H2O)2Mn5O10
+4/+3
Monoclinic


Romanechite)


Cryptomelane
KMn8O16
+4/+3
Monoclinic or





Tetragonal


Manjiroite
(K,Na)Mn8O16
+4/+3
Tetragonal


Lithiophorite
(Al•Li)MnO2(OH)2
+4/+3
Hexagonal


Chalcophanite
(Zn,Fe,Mn)Mn3O7
+4
Rhombohedral


Hollandite
(Ba,K,Na)Mn8(O, OH)16
+4/+3
Unknown


Woodruffite
(Zn,Mn)Mn3O7
+4
Tetragonal


Neltnerite
CaMn6SiO12
+3
Tetragonal


Birnessite
Na4Mn14O27
+4/+3
Hexagonal


Asbolane
(Ni,Co)xMn(O,OH)4
+4/+3
Hexagonal


Todorokite
(K,Ca,Na)(Mn,Al,Mg)6O12
+4/+3
Monoclinic


Vernadite
(Mn,Fe,Ca,Na)(O,OH)2
+4/+3
Hexagonal









a) Manganese Sources for “Sparingly Soluble” Pigments
Zinc and strontium chromates, as well as calcium plumbate, are “sparingly soluble” in water, and are typically formed via precipitation from a liquid media (i.e., water), with subsequent particle sizing and powder processing. Trivalent or tetravalent manganese pigments to be used for the same applications as zinc and strontium chromates, or calcium plumbate, are produced in a similar fashion. This is because the higher solubility requirements (1×10−1 to 1×10−4 moles/liter inhibitor ion) for these pigments necessitate much higher release rates of MnIII or MnIV than can typically be achieved by calcined or “fired” materials. MnIII or MnIV compounds that can achieve high solubilities and release rates require special valence stabilizer and/or solubility control agents. The easiest preparative method for these constituents is via precipitation processes.
Manganese precursors for “sparingly soluble” pigments can be nearly any water, alcohol, or hydrocarbon soluble manganese compound in which the manganese is in the divalent, trivalent, tetravalent, or heptavalent oxidation state. Water-soluble precursors are typically used. Inorganic divalent manganese precursor compounds include, but are not limited to, manganese nitrate, manganese sulfate, manganese perchlorate, manganese chloride, manganese fluoride, manganese bromide, manganese iodide, manganese bromate, manganese chlorate, and complex fluorides such as manganese fluosilicate, manganese fluotitanate, manganese fluozirconate, manganese fluoborate, and manganese fluoaluminate. Organometallic divalent manganese precursor compounds include, but are not limited to, manganese formate, manganese acetate, manganese propionate, manganese butyrate, manganese valerate, manganese benzoate, manganese glycolate, manganese lactate, manganese tartronate, manganese malate, manganese tartrate, manganese citrate, manganese benzenesulfonate, manganese thiocyanate, and manganese acetylacetonate.
The manganese precursor for “sparingly soluble” pigments may also be a compound with manganese already in the trivalent or tetravalent oxidation state. A representative example is manganese III acetylacetonate. The manganese precursor for “sparingly soluble” pigments may be a compound with the manganese in the heptavalent oxidation state (permanganates). Heptavalent manganese precursors include, but are not limited to: potassium permanganate, sodium permanganate, lithium permanganate, ammonium permanganate, magnesium permanganate, calcium permanganate, strontium permanganate, barium permanganate, zinc permanganate, ferric permanganate, nickel permanganate, copper permanganate, cobalt permanganate, cerium permanganate, lanthanum permanganate, yttrium permanganate, and aluminum permanganate.
b) Manganese Sources for “Low Solubility” or “Insoluble” Pigments
Lead chromates are typically formed via precipitation from aqueous solution, while red lead pigments are produced by firing PbII oxide (PbO) in an oxidizing environment at approximately 400° C. Trivalent or tetravalent manganese compounds to be used as lead chromate or red lead replacements can be formed in two ways: 1) precipitating a manganese compound from a liquid medium and then firing or calcining the resultant precipitate; or 2) calcining or firing a manganese-containing compound or mixture using insoluble precursors. The commonality between these two options is firing, calcining, or otherwise heating a manganese-containing compound or mixture. The only manganese compounds suitable as replacements for lead chromate or red lead pigments (<1×10−5 moles/liter inhibitor ion) are those produced by calcining or heating manganese compounds with or without other additives.
Soluble manganese sources for precipitation prior to calcining, firing, or otherwise heating are similar to those described above for “sparingly soluble” pigments. Insoluble manganese-containing compounds useful as precursors include MnII, MnIII, MnIV, and some MnVII compounds. Insoluble divalent manganese compounds useful as precursors include, but are not limited to: manganese oxide (manganosite), manganese hydroxide (pyrochroite), manganese carbonate (rhodochrosite), manganese silicate (rhodonite, tephroite, manganhumite, or manganjustite), manganese sulfide (alabandite or hauerite), manganese phosphate (reddingite or hureaulite), manganese oxalate, and manganese borate. Insoluble trivalent manganese or tetravalent manganese compounds suitable as precursors include manganese dioxide (MnO2), manganomanganic oxide (Mn3O4), manganese sesquioxide (Mn2O3), lithiated manganese spinel (LiMn2O4), and manganese III hydroxide (MnOOH). The MnIII and MnIV containing minerals described in Table 1 are also useful insoluble trivalent and tetravalent manganese precursors.
MnIII and MnIV are capable of providing corrosion protection at a distance to a metal surface in the presence of coating flaws such as scrapes, scratches, and holes because of their throwing power. The solubility of the MnIII or MnIV compound needs to be tailored to suit the needs of the protection system and must be neither too high, nor too low in that system. The protective system includes the binder phase, assorted modifiers, and under- and over-coatings. The system needs to be performance matched to its intended usage environment. Timely release and throwing power of the inhibitor are critical to protective performance, but controlled tailoring of these has not been taught in prior art. Likewise, the body of systematic chemistry data required to control these properties has not been readily available in a form useful to help design coatings. The present invention outlines how to stabilize MnIII and MnIV with a variety of materials so the MnIII and MnIV may be adapted to a multitude of pigment applications with specific compatibility requirements.
2) Oxidation Source
If MnIII and/or MnIV pigment compounds are produced via precipitation, an oxidizing species will typically be included in the synthesis solution if divalent manganese compounds are used as precursors for MnIII and MnIV. Otherwise, a post-precipitation oxidation step will be required. Additional amounts of oxidizer may be added to help control and maintain a desired amount of MnIII/MnIV in the pigment solution by reoxidizing MnIII/MnIV that has become reduced. The trivalent manganese ion is an exceptionally good oxidizing species with an oxidation-reduction potential of +1.49, V at a pH of 0 for the MnIII-MnII couple in water, and the tetravalent manganese ion is an even stronger oxidizing species, with a redox potential of +1.65 V under similar conditions. Strong oxidizers are required because of the high potential of their redox reaction. The oxidizers may be gases, liquids, or solids. Solid oxidizers are typically used for this application due to ease of handling and reagent measurement. Other starting materials (manganese source and stabilizer source) will also frequently be solids. Liquid oxidizers may be used, but handling and accurate process metering have proven difficult. Gaseous oxidizers may be the most cost effective and chemically efficient on a large scale, but are also the most problematic due to handling and venting concerns.
Oxidizers suited for the purpose of producing and maintaining the manganese ion in the trivalent or tetravalent charge state include but are not restricted to peroxides and peroxo compounds (including superoxides, persulfates, perborates, pernitrates, perphosphates, percarbonates, persilicates, peraluminates, pertitanates, perzirconates, permolybdates, pertungstates, pervanadates, and organic peroxyacid derivatives), ozone, hypochlorites, chlorates, perchlorates, nitrates, nitrites, vanadates, iodates, hypobromites, chlorites, bromates, permanganates, periodates, and dissolved gases such as oxygen, fluorine, or chlorine. Inorganic and organic derivatives of these compounds may be used. Typical oxidizers for this use are peroxides, persulfates, perbenzoates, periodates, bromates, hypochlorites, gaseous dissolved oxygen, and even the oxygen content of air. In general, any inorganic, organic, or combination species with an oxidation potential of +1.0, V or greater (at a pH of 1) will be capable of oxidizing divalent manganese to the trivalent or tetravalent oxidation state.
Oxidized manganese may also be produced in solution by electrolytic oxidation. However, this approach may not be economically feasible due to the energy costs associated with electrolytic oxidation. Chemical oxidation, such as that described above, currently offers the best-value approach for oxidizing manganese to the trivalent or tetravalent state.
It is also possible to produce a divalent manganese/valence stabilizer complex, and then apply an oxidizer to oxidize divalent manganese to trivalent or tetravalent manganese. This, however, is less typical because the percentage of trivalent or tetravalent manganese will decrease from the outside to the interior of the pigment particle.
Oxygen (including the oxygen content of air) is the most useful oxidizer source for the production of “low solubility” or “insoluble” trivalent or tetravalent manganese pigment compounds via calcining, firing, or otherwise heating processes. The control of temperature, partial pressure of oxygen, flowrate, and even particle size allows the oxidation state of the manganese in the sintered particle to be divalent, trivalent, or tetravalent. Other oxidizing gasses such as NOx, SOx, chlorine, fluorine, or ozone can also be used, but these are less desirable due to their environmental impact.
3) Valence Stabilizers
Manganese is effective as an oxidative corrosion inhibitor if it can be supplied in sufficient quantities in the trivalent and/or tetravalent charge-state when brought into contact with unprotected bare metal. Corrosion resistance comparable to that of CrVI or PbIV can be achieved by the use of MnIII and/or MnIV oxidizer ions in pigment compounds. Valence stabilizers are materials that, when assembled, modify the rate of reduction and the solubility of the MnIII and/or MnIV ions. Valence stabilization has not been previously recognized as an important consideration in the development of effective corrosion inhibiting pigments. Stabilization helps avoid reduction and premature conversion of the ion to the divalent charge-state during compound formation, carrier incorporation, application, and exposure to a corrosive environment. Stabilizers control solubility, mobility, ion exchange, binder compatibility, and the degree of surface wetting. The exact solubility of this compound may be modified by species released into solution by the dissolving metal surface or by the subsequent addition of solubility control agents. A variety of inorganic and organic stabilizers are available that can serve to control solubility. The stabilizer may also act as an ion-exchange host and/or trap for alkali or halide ions in solution.
Valence stabilization is necessary for MnIII and MnIV due to the reactivity of these ions with water. Unlike MnII, which can readily be solubilized in water, MnIII and MnIV ions rapidly react with water, producing elemental oxygen. Valence stabilization is particularly useful for the more soluble MnIII and MnIV compounds (i.e., >1×10−5 moles/liter of inhibitor ion) where more rapid release rates of these ions are necessary. For example, manganese dioxide (MnO2) is reported to exhibit a solubility in water between 2.4×10−5 and 4.0×10−7 moles/liter Mn+4, depending upon pH (Swain, et al., Anal. Chem. 47(7): 1135-7, 1975 and Savenko, Geokhimiya (3) pp. 416-9, 1985). Similarly, manganese sesquioxide (Mn2O3) is reported to exhibit a solubility in water between 3.3×10−8 and 5.1×10−9 moles/liter Mn+3, depending upon temperature (Ampelogova, et al., Radiokhimiya 31(4): 160-5, 1989). For these low solubility compounds, oxygen (O) is a satisfactory “valence stabilizer” to achieve the desired solubilities and release rates. Specialized valence stabilizers are necessary for MnIII and MnIV compounds of solubilities higher than 1×10−5 moles/liter Mn+3 or Mn+4.
The need for “valence stabilization” of trivalent or tetravalent manganese for corrosion inhibition has only been indirectly noted in the general corrosion literature as a synergistic enhancement. Corrosion inhibition behavior of nitrogen-containing organics such as aniline or pyridine has been reported to be enhanced with the addition of manganese. The exact nature of this “synergistic enhancement” has never been adequately explained. These “synergistic” mixtures of nitrogen-containing organics and manganese have also been described as being “oxygen-scavengers”, and the organics are frequently observed to “chemisorb” onto the substrate piece being protected.
This enhancement can be explained by the “valence stabilization” model of corrosion inhibition by trivalent or tetravalent manganese outlined here. Nitrogen-containing organics and manganese result in the formation of an organometallic complex where the central manganese ion can be stabilized in a higher oxidation state. The observed “oxygen-scavenging” phenomenon associated with dissolved oxygen in aqueous solutions is easily explained by the oxidation of stabilized divalent manganese to the trivalent or tetravalent state. “Sparingly soluble” MnIII or MnIV complexes containing these organics are responsible for the corrosion-inhibiting activity, and these organics will appear to be “adsorbed” or “chemisorbed” from solution onto the metal piece being protected due to precipitation.
The key to providing a useful source of trivalent or tetravalent manganese at a metal surface is the creation of a compound in which the MnIII or MnIV ion is shielded from premature reduction during and after pigment formation. The formation of pigments with the proper release rate of MnIII or MnIV ions is problematic because of the instability of MnIII and MnIV in solution. A valence stabilizer must assemble around MnIII or MnIV to form a compound in order to produce the active corrosion-inhibiting component in a pigment. It is difficult to place specific solubility values to these optimum sparingly soluble pigments because of the wide range of binder systems in which corrosion-inhibiting pigments are used.
In order to replace the zinc chromates, strontium chromate, or calcium plumbate pigments, a MnIII- or MnIV-stabilized compound with a solubility in water of between about 1×10−4 and about 1×10−1 moles per liter of trivalent or tetravalent manganese should exhibit appreciable corrosion inhibition when used as a primer pigment. This solubility range provides a release of trivalent or tetravalent manganese at a rate slow enough that protection will be provided for an extended period of time and fast enough to inhibit corrosion during conventional accelerated corrosion testing methods such as ASTM B-117 and G-85 for coatings that contain these pigments. Manganese compounds that fall outside of this particular solubility range may exhibit a small degree of corrosion inhibition in the binder systems that currently use the zinc or strontium chromate pigments. For example, compositions with solubilities as high as 1×100 moles per liter or as low as 1×10−5 moles per liter of trivalent or tetravalent manganese will exhibit some corrosion resistance, although they will not be as effective as those compounds within the optimum solubility range. A common MnIII compound (MnIII acetylacetonate) is too soluble to provide effective corrosion inhibition if incorporated into a binder system such as a paint. Other compounds, such as Mn3O4 as described in the prior art, will not serve as effective corrosion inhibiting pigments in the binder systems that currently use the zinc or strontium chromate pigments because they are too insoluble.
The needed solubility will be strongly dependent on the net aqueous solubility of overlying paints and coatings and their usage environment. For example, solubility tailoring would be useful in a situation where a protected substrate is suddenly immersed in seawater, or where a rubber sealant allows only limited water penetration. Adequate corrosion protection could be achieved through the formation of a trivalent or tetravalent manganese pigment compound that exhibits a higher solubility in water (e.g., 1×100 to 1×10−3 moles per liter MnIII or MnIV). A rapid release of protective trivalent or tetravalent manganese ions would happen at the expense of depleting the manganese quickly from the coating. Trivalent or tetravalent manganese pigments of lower solubilities (e.g., 5×10−5 to 1×10−3 moles per liter MnIII or MnIV) may also be useful in some situations (e.g., as paints in nearly pure deoxygenated water). The number and range of compound solubilities offered by valence stabilized MnIII and MnIV compounds allows the development of protective coating systems with broad performance and application ranges. This feature is not presently available even for CrVI based corrosion inhibiting pigments.
Any material in the synthesis bath which complexes with trivalent or tetravalent manganese (whether inorganic or organic) and which results in the formation of a MnIII- or MnIV-containing compound that exhibits solubilities within or near this solubility range can serve as a valence stabilizer for trivalent or tetravalent manganese. The assembly of a protective shell around the highly charged MnIII or MnIV and its associated oxygen and hydroxyl species can help control the rate at which the manganese is reduced and its oxygen is released. Proper selection of materials for forming the protective shell will allow solubility tailoring of the entire assembly to its intended application environment. Valence stabilizers described above may need some type of additional solubility control to optimize the performance of the trivalent or tetravalent manganese-valence stabilizer compound. Additional solubility control agents may be in the form of inorganic or organic compounds. Their use is optional rather than a requirement for effective valence stabilization and solubility control.
Trivalent or tetravalent manganese-containing compounds that are useful as replacements for lead chromate or red lead pigments require lower solubilities. A typical formula for a red lead paint is:
















Red lead (Pb3O4)
80 wt. Percent



Linseed oil
18 wt. Percent



Turpentine and liquid drier
 2 wt. Percent










The majority of this paint system is pigment. If the pigment in this paint system exhibited excessive solubilities for this specific application, the coating would quickly be exhausted, leaving limited protection for the underlying metal.

An optimum solubility range from 1×10−6 to 1×10−8 moles per liter trivalent or tetravalent manganese is desirable for manganese pigments to inhibit corrosion in the binder systems that lead chromate pigments currently are used in. Pigments that incorporate trivalent or tetravalent manganese that fall slightly outside of this range may also inhibit corrosion as lead chromate replacements. For example, pigments with solubilities as high as 1×10−5 moles per liter or as low as 1×10−9 moles per liter of trivalent or tetravalent manganese at standard temperature and pressure (about 25° C. and about 760 Torr) will exhibit some corrosion resistance in binder systems that currently incorporate lead chromate, although not as great as those compounds which fall within the optimum solubility range.
Any trivalent or tetravalent manganese pigment that exhibits a solubility lower than 1×10−9 moles per liter of trivalent or tetravalent manganese at standard temperature and pressure (about 25° C. and about 760 Torr) will exhibit some corrosion resistance in binder systems that currently incorporate red lead. Under special conditions (i.e., very carefully controlled particle sizes), trivalent or tetravalent manganese compounds with solubilities as high as 1×10−7 moles per liter trivalent or tetravalent manganese can be used as red lead replacements.
As with the more soluble MnIII and MnIV compounds used as zinc or strontium chromate replacements, changes in pigment solubility can be achieved through the use of additional solubility control agents.
Several variables are associated with making optimized pigments. If the pigment is too insoluble for the specific application, then insufficient trivalent or tetravalent manganese is available to inhibit corrosion. Low solubility compounds that do not provide a sufficient amount of oxidation quickly enough to a coating breach may produce an incomplete oxide layer and thus an ineffective barrier film. If the manganese pigment is too soluble, it will be washed away quickly, and an incomplete thin oxide film will form that will not provide long-term corrosion protection, or osmotic blistering of the paint system may result. The formation of spotty or patchy oxides can promote localized crevice corrosion and can result in enhanced corrosion rates at the breach.
The traditional chromate pigments are used not only in alkyd resin systems (e.g., DoD-P-15328D Wash Primers), but also in acrylic systems (e.g., MIL-P-28577B Water-Borne Acrylic Primers), and even in sulfonated rubber sealants (e.g., MIL-PRF-81733D Sealing and Coating Compound). Tetravalent lead pigments are typically used in either oil-based (i.e., linseed oil) paint systems, although some are used in alkyd resin coatings. Fortunately, it is possible to tailor the MnIII and/or MnIV valence stabilizer compound pigment systems themselves to specific binder/solvent systems using solubility (cohesion) parameters. Solubility parameters define how well an inorganic or organometallic complex will disperse in a given resin/binder system. This represents a radical departure from traditional paint systems, in which the paint systems are configured to specific pigments.
The formation of an electrostatic double layer can be important for the effectiveness of a corrosion inhibitor once it is released into solution during corrosion. There are differences in anodic and cathodic polarization, solubility, and the saturated pH of aqueous solutions of various chromate or plumbate pigments. The formation of an electrostatic double layer around the pigment while in its carrier film will not be as important as when the species is in solution. For this reason, the development of an electrostatic double layer around the pigment is an optional consideration. For example, zinc chromate pigment-filled paint does not exhibit electrochemical inhibiting behavior. The carrier film typically behaves as a water impermeable barrier and will muffle the polar character of the pigment. The hexavalent chromium pigments SrCrO4 and ZnCrO4 have very small barrier layers associated with them, but they are effective as corrosion-inhibiting pigments. Optimized solubility for MnIII- or MnIV-valence stabilizer compounds alone can result in corrosion resistance comparable to the state-of-the-art chromium pigments. The degree of polarization exhibited by the MnIII or MnIV ions will be less than the CrVI ion because of their larger ionic radius and lower charge-state, and they will not be as efficient in forming electrostatic double layers in aqueous solution. The valence stabilization of trivalent or tetravalent manganese should be optimized to achieve the highest degree of efficiency in both solubility control and polar character, in order to further enhance the corrosion resistance.
Conversely, because both the MnIII and MnIV ions are smaller than the PbIV ion, the degree of polarization exhibited by these ions will be greater than PbIV, and they will be more effective in forming electrostatic double layers in aqueous solution. In order to replace PbIV pigments, a lower degree of valence stabilization is therefore acceptable.
The nature and character of the “electrostatic double layer” surrounding the trivalent or tetravalent manganese/valence stabilizer compound may be controlled and modified by careful selection of organic or inorganic stabilizers. Characteristics such as the electrical dipole moment and the shape/conformation (for steric effects) of the stabilizer were found to influence the performance of the corrosion-inhibiting pigment. These stabilizer ions establish a protective electrostatic shell around the cation-stabilizer compound and gather additional layers of ions such as hydronium (H3O+) or hydroxide (OH−) about them. The size of the electrostatic double layer is a function of the electrostatic potential at the compound surface and is inversely proportional to the ionic strength of the surrounding solution. An electrostatic double layer will likely form in aqueous solution for compounds that can carry a charge, have a natural electrostatic dipole, or can have an induced dipole. However, these compounds do not normally act as corrosion inhibitors because they have not been optimized for that purpose.
The melting point and decomposition temperature of the pigment material are important. Trivalent or tetravalent manganese-valence stabilizer compounds that decompose below about 100° C. limit both their useful lifetimes and range of use. The melting temperature should be above about 50° C. to ensure that the liquid phase does not form during normal handling procedures. An additive may be needed for pigments with melting temperatures below about 50° C. Inert solid addendum materials need not have any inherent corrosion-inhibiting capability and are used to provide a base (support) that the pigment can absorb on or into. Oxides, phosphates, borates, silicates, and polymers are examples of support compounds that can be used. Low melting temperature pigments (below about 50° C.) can be used, but they require handling and processing different from higher melting temperature pigments. Liquid-phase corrosion inhibitors based on MnIII, MnIV, and CrVI pigments have been demonstrated to provide excellent performance as corrosion inhibitors in primer paint systems.
The corrosion-inhibiting pigments of the present invention can optionally exhibit a color change between oxidized species and divalent species. The implications of these color changes from an applications standpoint are significant. Color changes in the pigment material in use can be used as a metric to determine when the pigment no longer exhibits corrosion-inhibiting action as a result of depleting the oxidized ion. Changes in hue of the pigment can be used to determine how much service life remains for that pigment in terms of corrosion-inhibiting capacity. Valence based color change is an attribute that conventional chromate or plumbate pigments do not exhibit. The color change associated with their redox reaction of chromate or plumbate pigments is insignificant as the pigments are reduced and “depleted” of their corrosion-inhibitive capability. Thus, trivalent or tetravalent manganese/valence stabilizer combinations that exhibit these color changes are superior to chromium or lead in terms of providing an easily measured, easily observed metric to gauge remaining service life of the pigment. However, this color change should not be initiated by exposure to strong light. Light-fast pigments are therefore desirable for these indicator pigments.
The incorporation of the valence stabilizer (inorganic or organic) may optionally result in the formation of a MnIII- or MnIV-valence stabilizer compound that also exhibits ion exchange behavior towards alkali ions. This is not a requirement of the MnIII- or MnIV-valence stabilizer compound, and pigments that do not exhibit this phenomenon have been successfully demonstrated to inhibit corrosive attack. However, it is a desirable characteristic for enhanced corrosion resistance. Existing CrVI-based or PbIV-based pigment systems do not exhibit this behavior to any significant degree.
The design of suitable MnIII- or MnIV-valence stabilizer compounds allows typical and less typical stabilizers to be identified. The general classes of compounds described below represent only a first approximation of whether a specific coordination compound will provide favorable or unfavorable properties in a MnIII- or MnIV-valence stabilizer compound. Property tailoring can also take place through selection of specific anions or cations bound to the MnIII- or MnIV-valence stabilizer coordination compound. The “physiology” of inorganic stabilizers is simple because of the limited number of atoms and structural arrangements involved in their formation. The “physiology” of organic stabilizers is not as simple. An organically stabilized manganese compound may have one or more organic ligands that may have one or more bonding sites that can interact with the MnIII or MnIV ion/oxide cluster. The bonding groups can be the same or different atoms or functional groups on an individual or a variety of ligands. An organic stabilizer ligand can be modified in an unlimited number of ways to tailor its physical behavior with respect to such properties as chemical reactivity, solubility, electrostatic and polar character, and functional behavior.
It is possible to fine tune the electronic and structural characteristics of a MnIII- or MnIV-valence stabilizer compound further via substituent groups on the coordinating ligand, and/or by the selection of cations or anions to complete the charge balance of the MnIII- or MnIV-valence stabilizer compound. For example, some substituent groups have large dipole moments associated with them, which will increase the electrostatic barrier layers associated with the manganese/valence stabilizer complexes. These include: ketones (═C═O), thioketones (═C═S), amides (—C[═O]—NR2), thioamides (—C[═S]—NR2), nitriles or cyano groups, (—CN), isocyanides (—NC), nitroso groups (—N═O), thionitroso groups (—N═S), nitro groups (—NO2), azido groups (—N3), cyanamide or cyanonitrene groups (═N—CN), cyanate groups (—O—CN), isocyanate groups (—N═C═O), thiocyanate groups (—S—CN), isothiocyanate groups (—N═C═S), nitrosamine groups (═N—N═O), thionitrosamine groups (═N—N═S), nitramine groups (═N—NO2), thionitramine groups (═N—NS2), carbonylnitrene groups (—CO—N), thiocarbonylnitrene groups (—CS—N), sulfenyl halides (—S—X), sulfoxides (═S═O), sulfones (═S[═O]2), sulfinyl groups (—N═S═O), thiosulfinyl groups (—N═S═S), sulfenyl thiocyanato groups (—S—S—CN), sulfenyl cyanato groups (—S—O—CN), sulfodiimine groups (═S[═NH]2), sulfur dihaloimido groups (—N═SX2), sulfur oxide dihaloimido groups (—N═S[═O]X2), aminosulfur oxide trihalide groups (═N—S[═O]X3), sulfonyl azide groups (—S [═O]2N3), sulfonyl thiocyanate groups (—S[═O]2SCN), sulfonyl cyanate groups (—S[═O]2OCN), sulfonyl cyanide groups (—S[═O]2CN), halosulfonate groups (—S[═O]2OX), phosphonyl thiocyanate groups (—P[═O]OHSCN), phosphonyl cyanate groups (—P[═O]OHOCN), and phosphonyl cyanide groups (—P[═O]OHCN). In this way, the characteristics of less typical coordinating ligands may be adjusted so that the resultant MnIII- or MnIV-valence stabilizer compound does exhibit some degree of corrosion inhibition. Conversely, the physical characteristics of typical coordination compounds can be adjusted so that they are no longer suitable as a corrosion inhibitor.
Valence stabilizers can be either organic or inorganic compounds. Manganese coordination chemistry, which has been the subject of numerous scientific studies for almost 100 years, identifies chemical binding preferences, structure stability, and the physical properties of the resulting compounds. Producing effective MnIII- and/or MnIV-valence stabilizer compounds requires understanding the electrostatic and structural influence of candidate species on the compound. The solubility of the valence stabilized MnIII- and/or MnIV-compound scales roughly with the inverse of its diameter. The MnIII and MnIV ions and their layer of negatively charged hydroxyl ions are very small, which results in a high degree of aqueous solubility. The field strength of the complex also scales with the inverse of its physical diameter. Large compounds with an optimal degree of solubility will not necessarily be ideal with respect to the size of their electrostatic double layer. The size of the ligand must therefore be balanced against the desired electrical properties. The MnIII ion generally favors complexation either in the square pyramidal (coordination number 5) or octahedral (coordination number 6) arrangements, although it will occasionally be found in a pentagonal bipyramid arrangement. The MnIV ion almost exclusively favors complexation in the octahedral (coordination number 6) arrangement. Valence stabilizers (and stabilizer combinations) should be selected with the goal of achieving these coordinations.
Stabilizers can be designed that result in manganese compounds with the necessary physical, electrical, and chemical properties to perform as corrosion inhibitors with this information. The nature of a particular valence stabilizer shell surrounding the manganese ion, or combination of valence stabilizers, can be further manipulated by the selection of appropriate “shaping groups” and heteroatoms at the binding site. Inorganic valence stabilizers are typically oxygen-containing coordinations. Therefore, manipulation of different sized ionic complexes around the MnIII or MnIV ions is best controlled through adjustment of the heteroatoms (e.g., Mo, W, Te, etc.) within these “polymerized” oxygen-containing ionic complexes (ligands).
For organic compounds, the physical geometry of the binding sites is important to the stability of the MnIII- or MnIV-stabilizer compound. The influence of site geometry becomes evident when the solvation shell of a MnIII or MnIV ion is replaced by the ligand donor atoms as when pigments are formed. The number of available ligand binding sites should be at least equal to the standard coordination number of the MnIII or MnIV ion. The balance between solvation of the ligand and MnIII and/or MnIV and their complexation where MnIII or MnIV is solvated by a specific ligand is critical in maintaining stability. MnIII- or MnIV-ligand attraction increases with the number of available binding sites on the ligand. However, with an increasing number of binding sites, site-site repulsions will also increase, resulting in lower stability.
The number of binding sites available on the complexing ligand is important to the resulting MnIII- or MnIV-stabilizer's properties. Several ligands are required to effectively stabilize MnIII or MnIV if the chosen ligand has only one binding site. For example, six NH3 ligands are needed to octahedrally coordinate MnIII in a hexaaminemanganese (III) compound because NH3 has only one binding site. Bulky ligands with only one binding site, like pyridine, can be sterically hindered from packing tightly around the ion and will result in decreased compound stability. Conversely, macrocyclic organic and polymeric inorganic ligands can have many suitable binding sites. However, instability will result if a MnIII or MnIV ion is not completely embraced by all of the multiple macromolecular bonding sites on the ligand. For example, if a macromolecule surrounding the MnIII or MnIV ion has an insufficient number of binding sites available for charge balance, then the MnIII- or MnIV-stabilizer compound will be much less stable than a macromolecule that contains an adequate number of sites.
The stability of the MnIII- or MnIV-organic compound is strongly influenced by the charge, charge sign, and degree of polarizability of specific binding sites. Factors influencing compound stability include: 1) ion-pair interactions for charged ligands and MnIII or MnIV; 2) ion-dipole and ion-induced dipole interactions for neutral ligands; 3) hydrogen bonding; and 4) the hard-soft acid-base (HSAB) rules convention of coordination chemistry. HSAB rules help identify functional groups on ligands that might be effective as binding sites. Optimum binding for organic valence stabilizers to MnIII or MnIV will be with ligands with hard bonding species such as those that contain oxygen or nitrogen. Certain coordination complexes of the soft base sulfur are also effective for binding with MnIII or MnIV. HSAB rules can also help identify groups that might provide a degree of polarization to the stabilizer because of their large dipole moments. The nature of bonding between the MnIII or MnIV ion/oxide cluster and the stabilizer ligand can be altered by using a substituent group to modify the stabilizer. Specific interactions between the ligand and MnIII or MnIV can be tailored by substituent group selection coupled with altering the size or geometry of the complexing ligand. Some substituent groups, such as carbonyls (ketones, amides, ureas), nitro groups, cyano groups, and azido groups have large dipole moments. The polarization of the MnIII- or MnIV-stabilizer can therefore be optimized via evaluation of the effect of ligand type and substituents.
Finally, the size of the valence stabilizer plays an important role in solubility control of the resultant MnIII- or MnIV-valence stabilizer compound. As the ligand increases in size, it becomes more difficult to keep it in solution, therefore lowering the solubility. However, this must be balanced against the fact that as ligands are increased in size, it also becomes more difficult to establish the necessary dipoles at the compound/water interface. The size of the ligand must therefore be balanced against the desired electrical properties. The addition (or subtraction) of functional groups on organic valence stabilizers can be used to modify the solubility of the formed Mn+3 or Mn+4/valence stabilizer species. For example, the addition of sulfonated groups (—SO3−) to organic valence stabilizers will significantly increase the solubility in water. Other substituent groups that will increase the solubility in water include: carboxyl groups (—CO2−), hydroxyl groups (—OH), ester groups (—CO3—), carbonyl groups (═C═O), amine groups (—NH2), nitrosamine groups (═N—N═O), carbonylnitrene groups (—CO—N), sulfoxide groups (═S═O), sulfone groups (═S[═O]2), sulfinyl groups (—N═S═O), sulfodiimines (═S[═NH]2), sulfonyl halide groups (—S[═O]2X), sulfonamide groups (—S[═O]2NH2), monohalosulfonamide groups (—S[═O]2NHX), dihalosulfonamide groups (—S[═O]2MX2), halosulfonate groups (—S[═O]2OX), halosulfonate amide groups (═N—S[═O]2X), aminosulfonate groups (═N—S[═O]2OH), iminodisulfonate groups (—N[SO3−]2), phosphonate groups (—PO3−2), phosphonamide groups (—PO2NH2−), phosphondiamide groups (—PO[NH2]2), aminophosphonate groups (═N—PO3−2), and iminodiphosphonate groups (—N[PO3−2]2). Conversely, the addition of nitro groups (—NO2), perfluoroalkyl groups (—CxF2x+1), perchloroalkyl groups (—CxCl2x+1), nitramine groups (═N—NO2), thioketone groups (═C═S), sulfenyl halide groups (—S—X), and sulfur dihaloimide groups (—N═SX2) to organic valence stabilizers will decrease the solubility in water. In this way, the solubility characteristics of valence stabilizers can be “tailored” to meet specific binder/resin needs.
Valence stabilizers and combinations of stabilizers can be manipulated by the selection of “shaping groups” and heteroatoms positioned at the binding site. Saturated organic chains can form flexible ligands that wrap around MnIII- or MnIV- and can enhance their stability. Unsaturated organics typically have less freedom to bend and contort and are less likely to be a ligand that can wrap or fit around the MnIII or MnIV ions. Addition of substituents onto an organic ligand may further restrict its freedom to flex. For example, the attachment of a phenyl group onto an organic valence stabilizer that contains two or more binding sites will likely restrict the ability of that ligand to flex around the MnIII or MnIV ions so as to coordinate it as a square pyramid or octahedral complex.
The physical, chemical, and electrostatic requirements for the design of effective pigments based on MnIII- or MnIV-stabilizer compounds result in lists of stabilizers that may be divided into wide band or narrow band stabilizer classes for MnIII or MnIV, depending upon the application. Wide band valence stabilizers can be used under a wide variety of service conditions (e.g., corroding specie, temperature, etc.) to achieve a high degree of corrosion resistance. Wide band physical properties (stability, solubility, and polarization) can be achieved by both inorganic or organic valence stabilizers. The desirable physical property of ion exchange can also be achieved with both inorganic and organic coordination compounds. “Narrow band” valence stabilizers result in satisfactory pigments only under limited applications. Table 3 lists the wide and narrow band valence stabilizers for MnIII and MnIV depending upon the specific application.
The compounds listed here are general guides for the initial selection of a coordination compound and do not represent a complete list. Tailoring substituent groups and the selection of cations or anions for charge balance can influence whether a particular MnIII- or MnIV-stabilizer compound will have wide band or narrow band corrosion inhibiting characteristics. Both inorganic or organic valence stabilizers may form compounds with the necessary physical properties of stability, solubility, and polarization to be effective corrosion inhibiting pigments.







TABLE 3







Wide and Narrow Band Valence Stabilizers for Trivalent and/or


Tetravalent Manganese Replacements for Hexavalent


Chromium or Tetravalent Lead Pigments









Hexavalent Chromium or

Narrow Band


Tetravalent Lead Pigment
Wide Band Valence
Valence


to be Replaced
Stabilizers
Stabilizers





Zinc Chromates (including
Inorganic:
Inorganic:


basic forms)
Molybdates, tungstates,
Bismuthates,


Strontium Chromates
vanadates, niobates,
germanates,


Calcium Plumbate
tantalates, tellurates,
arsenates



periodates, iodates,



antimonates, stannates,



sulfates, polyphosphates



Organic:
Organic:



See Table 4
See Table 5


Lead Chromates (including
Inorganic:
Inorganic:


basic forms)
Oxygen, titanates,
Carbonates


Lead Molybdate-Chromate
zirconates, tantalates,


Lead Silicochromate
aluminates, silicates,



phosphates, borates



Organic:
Organic:



none
none


Red Lead
Inorganic:
Inorganic:



Oxygen, titanates,
None



zirconates, tantalates,



aluminates, silicates



Organic:
Organic:



none
none









3a) Wide Band Inorganic Valence Stabilizers

Wide band inorganic valence stabilizers are formed around the MnIII or MnIV ion by “polymerizing” in synthesis solution. Inorganic wide band valence stabilizers for MnIII or MnIV for “sparingly soluble” pigments include molybdates (Mo+6, Mo+5, or Mo+4, for example [Mn+4Mo9O32]6− and [Mn+4Mo12O40]4−), tungstates (W+6, W+5, or W+4, for example [Mn+4W12O40]4− and [Mn+32W22O74]10−), vanadates (V+5 and V+4, for example [Mn+4V13O38]7− and [Mn+4V11O32]5−), niobates (Nb+5 and Nb+4, for example [Mn+4Nb12O38]12−), tantalates (Ta+5 and Ta+4, for example [Mn+4Ta12O38]12−), tellurates (Te+6 and Te+4, for example [Mn+4Te3O18]14−), periodates (I+7, for example [Mn+4I3O18]11−), iodates (I+5, for example [Mn+4I6O18]2−), antimonates (Sb+5 and Sb+3), stannates (Sn+4), sulfates (S+6, such as manganese spinels [Mn+3(SO4)2]1−), and polyphosphates (P+5, for example [Mn+3P3O10]2− and [Mn+3P2O7]1−). Many of these inorganics form octahedral and square pyramidal heteropolymetallate structures on precipitation from solution. For example, tellurate ions begin to polymerize near pH 5 in water and will complex with MnIII or MnIV ions in basic solution pH's. Therefore, as the pH is raised in the pigment synthesis bath, the tellurate ion polymerizes to polymorphs, which then complex the MnIII or MnIV ion.
The general structural aspects of heteropolymetallates are well understood, and the stability of heteropolymetallates as a function of composition and structure is also well-characterized. The relatively unstable MnIII or MnIV ions are protected and stabilized within the surrounding octahedral and square pyramidal groups, although specific configurations of the heteropolymetallate anions differ from stabilizer to stabilizer (i.e., from molybdate to periodate or iodate). The dimensions of the octahedra and square pyramids are controlled by the size of the heteroatom (e.g., Mo, W, or Te) around which they are assembled.
A MnIII or MnIV ion trapped by the precipitation of these heteropolymetallates and its resulting “ion within a cage” structure can exhibit an even greater apparent volume due to the development of a large electrostatic double layer. This will influence both the valence stabilization of the MnIII or MnIV, as well as the solubility of the assembled compound. These compounds are reported to be excellent ion exchange agents for alkali ions. This caging structure serves to lower the solubility of the MnIII or MnIV because the chemical elements typically associated with these valence stabilizers (e.g., I, Te, Mo, or W) are all inherently less soluble in water than Mn. These materials can also establish oriented dipoles with the interior MnIII or MnIV ion and form an electrostatic double layer during aqueous corrosion. Finally, the elements associated with these valence stabilizers themselves can contain high valence ions (i.e., V+5, Te+6, or Mo+6), which will also serve somewhat in corrosion protection, although not to the degree of MnIII or MnIV (or CrVI), due to their lower redox potential.
Water-soluble precursors for these materials are generally used so that the synthesis can be carried out from aqueous solution. Many elements associated with these stabilizers (e.g., Mo, W, or Te) do not typically form water-soluble compounds so the identification of suitable precursors can be difficult.
Complex, partially-polymerized salts such as para- or meta-polymorphs for each compound may also be used as precursors. These polymorphs typically exhibit slightly lower solubilities in water than the simple salts. Peroxo-salts of these compounds, especially permolybdates, pertungstates, and pervanadates may also be used as precursors. Formation of the chosen heteropolymetallates from precursors such as the fluorides, chlorides, bromides, nitrates, and perchlorates (e.g., SnCl4 to form heterostannates and SbF5 to form heteroantimonates) can be difficult, but may be acceptable in certain circumstances. A valence stabilizer can be a cross between two or more of the wide-band inorganic valence stabilizers listed above. For example, a valence stabilizer composed of a periodate and a molybdate may be desirable in some situations. During the synthesis process, both of these materials will polymerize to form a mixed periodate/molybdate valence stabilizer out of the pigment solution.
The most notable valence stabilizer for low and insoluble MnIII and MnIV pigments is oxygen (O), as evidenced by the natural stability of such compounds as MnO2, Mn3O4, Mn2O3 and MnOOH, all of which contain MnIII and/or MnIV ions. In instances where oxygen is used as a valence stabilizer for MnIII or MnIV, differences in addendum cations (i.e., Ca+2 in CaMn2O4 or Zn+2 in ZnMn2O4) are observed to alter the solubility of the formed compound, and its performance as a corrosion inhibitor in a given binder system. This is discussed under Section 4 describing Additional Solubility Control Agents.
Additional wide band valence stabilizers for MnIII or MnIV for “low solubility” or “insoluble” pigments include silicates (Si+4, for example [Mn+3, Si2O6]1−), borates (B+3, for example Mn+32B4O9), phosphates (P+5, for example Mn+3, PO4), titanates (Ti+4), zirconates (Zr+4), and aluminates (Al+3). These compounds can also form octahedral or square pyramids, but have a higher tendency to form chain-like structures during calcining or firing. Combinations of these materials, such as phosphosilicates, aluminosilicates, or borosilicates may also function as wide band valence stabilizers for low and insoluble MnIII and MnIV compounds.
3b) Wide Band Organic Valence Stabilizers
A variety of organic compounds meet the criteria to be typical wide band valence stabilizers for MnIII or MnIV. These coordination ligands produce MnIII or MnIV valence stabilized compounds that fulfill the general requirements of a MnIII or MnIV pigment material. Organic compounds can be very effective manganese stabilizers and provide the greatest degree of freedom in designing new manganese-stabilizer compounds with new functionalities. More possible organic valence stabilizer species exist than inorganic valence stabilizers because of the immense number of organic compounds and functionalities from which to choose. Water-soluble precursors for the organic valence stabilizers are generally used so that pigment synthesis can be carried out in aqueous solution. However, alcohol or hydrocarbon soluble species can also be used.
The number of wide band (and narrow band) organic compounds that are acceptable as valence stabilizers for trivalent or tetravalent manganese is limited. Common organic compounds such as alcohols, aldehydes, ketones, esters, ethers, alkyl or aromatic halides, most carboxylic acids, anhydrides, phenols, sulfonic acids, phosphonic acids, carbohydrates, waxes, fats, sugars, and oils are not as effective as the structural types described in these Tables to stabilize the trivalent or tetravalent manganese ion. At best, some of the organic types described in these Tables may presently be used for other industrial applications, but their incorporation into corrosion-inhibiting blends to stabilize trivalent or tetravalent manganese has heretofore been unrecognized.
The choice of substituent functional groups on these general classes of valence stabilizers will affect the physicochemical properties of the MnIII- or MnIV-containing compound and the corrosion resistance achieved using that compound. For example, the addition of —NH2 or ═O substituents increases the net polarization of the overall net MnIII or MnIV/valence stabilizer compound, but will also increase its water solubility. Careful molecular design of MnIII and MnIV compounds is necessary in order to achieve desired performance characteristics.
In general, the bonding atoms in typical organic valence stabilizers are nitrogen, oxygen, or sulfur. Bonding atoms such as phosphorus, carbon, silicon, tin, arsenic, and antimony are much less desirable due to problems with valence stability, toxicity, or solubility. Other stable coordinations (like pentagonal bipyramidal) are known, even though these particular agents prefer octahedral or square pyramidal coordination with Mn+3 or Mn+4. These valence stabilizers all serve to stabilize the Mn+3 or Mn+4 ions within a sparingly soluble complex that can exhibit a polar character in aqueous solution.







TABLE 4







Wide Band Organic Valence Stabilizers for the Mn+3 and Mn+4 Ions








General Structural Name



(Type of Organic)
Structural Representation





N Valence Stabilizer #1:
NH3, NH2R, NHR2, and NR3 where R


Monoamines (N Monodentates)
represents H or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #2:
R′—N—R—N—R′′, where R, R′, and R′′ represent H


Diamines (N—N Bidentates)
or any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding



N, O, S, or P atoms.


N Valence Stabilizer #3:
R—N—R′—N—R′′—N—R′′′, where R, R′, R′′, and R′′′


Triamines (either N—N Bidentates or N—N
represent H or any organic functional group


Tridentates)
wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #4:
R—N—R′—N—R′′—N—R′′′—N—R′′′′, where R, R′, R′′,


Tetramines (N—N Bidentates, N—N
R′′′, and R′′′′ represent H or any organic


Tridentates, or N—N Tetradentates)
functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #5:
R—N—R′—N—R′′—N—R′′′—N—R′′′′—N—R′′′′′, where R,


Pentamines (N—N Bidentates, N—N
R′, R′′, R′′′, R′′′′, and R′′′′′ represent H or any


Tridentates, or N—N Tetradentates)
organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #6:
R—N—R′—N—R′′—N—R′′′—N—R′′′′—N—R′′′′′—N—R′′′′′′,


Hexamines (N—N Bidentates, N—N
where R, R′, R′′, R′′′, R′′′′, R′′′′′, and R′′′′′′


Tridentates, N—N Tetradentates, or N—N
represent H or any organic functional group


Hexadentates)
wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #7:
Five membered heterocyclic ring containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms, all of


containing One, Two, Three, or Four
which may or may not function as binding sites.


Nitrogen Atoms wherein at least one
Can include other ring systems bound to this


Nitrogen Atom is a Binding Site (N
heterocyclic ring, but they do not coordinate


Monodentates or N—N Bidentates)
with the stabilized, high valence metal ion.



Ring can also contain O, S, or P atoms. This 5-



membered ring and/or attached, uncoordinating



rings may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


N Valence Stabilizer #8:
Six membered heterocyclic ring containing one,


Six-Membered Heterocyclic Rings
two, three, or four nitrogen atoms, all of which


containing One, Two, Three, or Four
may or may not function as binding sites. Can


Nitrogen Atoms wherein at least one
include other ring systems bound to this


Nitrogen Atom is a Binding Site (N
heterocyclic ring, but they do not coordinate


Monodentates or N—N Bidentates)
with the stabilized, high valence metal ion.



Ring can also contain O, S, or P atoms. This 6-



membered ring and/or attached, uncoordinating



rings may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


N Valence Stabilizer #9:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional nitrogen-


Nitrogen Atoms and having at least one
containing substituents (usually amines) that


additional Nitrogen Atom Binding Site not
constitute N binding sites. Can include other


in a Ring (N Monodentates, N—N
ring systems bound to the heterocyclic ring or to


Bidentates, N Tridentates, N—N
the N-containing substituent, but they do not


Tetradentates, or N—N Hexadentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or N-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N Valence Stabilizer #10:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional nitrogen-


Nitrogen Atoms at least one additional
containing substituents (usually amines) that


Nitrogen Atom Binding Site not in a Ring
constitute N binding sites. Can include other


(N Monodentates, N—N Bidentates, N—N
ring systems bound to the heterocyclic ring or to


Tridentates, N—N Tetradentates, or N—N
the N-containing substituent, but they do not


Hexadentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or N-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N Valence Stabilizer #11:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional nitrogen-


Nitrogen Atoms at least one additional
containing rings that constitute N binding sites.


Nitrogen Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N Monodentates, N—N Bidentates, N—N
containing heterocyclic rings, but they do not


Tridentates, N—N Tetradentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



additional N-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N Valence Stabilizer #12:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional nitrogen-


Nitrogen Atoms at least one additional
containing rings that constitute N binding sites.


Nitrogen Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N Monodentates, N—N Bidentates, N—N
containing heterocyclic rings, but they do not


Tridentates, N—N Tetradentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



additional N-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N Valence Stabilizer #13:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Six-, Eight-, and Ten-
six, eight, or ten nitrogen binding sites to


Membered Macrocyclics, Macrobicyclics,
valence stabilize the central metal ion. Can


and Macropolycyclics (including
include other hydrocarbon or ring systems


Catapinands, Cryptands, Cyclidenes, and
bound to this macrocyclic ligand, but they do


Sepulchrates) wherein all Binding Sites are
not coordinate with the stabilized, high valence


composed of Nitrogen (usually amine or
metal ion. This ligand and/or attached,


imine groups) and are not contained in
uncoordinating hydrocarbons/rings may or may


Component Heterocyclic Rings (N—N
not have halogen or polarizing or water-


Bidentates, N—N Tridentates, N—N
insolubilizing/solubilizing groups attached.


Tetradentates, and N—N Hexadentates)


N Valence Stabilizer #14:
Macrocyclic ligands containing a total of four,


Four-, Six-, Eight-, or Ten-Membered
six, eight, or ten five-membered heterocyclic


Macrocyclics, Macrobicyclics, and
rings containing nitrogen binding sites. Can


Macropolycyclics (including Catapinands,
include other hydrocarbon/ring systems bound


Cryptands, Cyclidenes, and Sepulchrates)
to this macrocyclic ligand, but they do not


wherein all Binding Sites are composed of
coordinate with the stabilized, high valence


Nitrogen and are contained in Component
metal ion. This ligand and/or attached,


5-Membered Heterocyclic Rings (N—N
uncoordinating hydrocarbon/rings may or may


Bidentates, N—N Tridentates, N—N
not have halogen or polarizing or water-


Tetradentates, or N—N Hexadentates)
insolubilizing groups attached.


N Valence Stabilizer #15:
Macrocyclic ligands containing at least one 5-


Four-, Six-, Eight-, or Ten-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide nitrogen binding sites


Macropolycyclics (including Catapinands,
to valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine or imine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Nitrogen and are contained in a
the total number of binding sites is four, six,


Combination of 5-Membered Heterocyclic
eight, or ten. Can include other


Rings and Amine or Imine Groups (N—N
hydrocarbon/ring systems bound to this


Bidentates, N—N Tridentates, N—N
macrocyclic ligand, but they do not coordinate


Tetradentates, or N—N Hexadentates)
with the stabilized, high valence metal ion. This



ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


N Valence Stabilizer #16:
Macrocyclic ligands containing a total of four,


Four-, Six-, Eight-, or Ten-Membered
six, eight, or ten six-membered heterocyclic


Macrocyclics, Macrobicyclics, and
rings containing nitrogen binding sites. Can


Macropolycyclics (including Catapinands,
include other hydrocarbon/ring systems bound


Cryptands, Cyclidenes, and Sepulchrates)
to this macrocyclic ligand, but they do not


wherein all Binding Sites are composed of
coordinate with the stabilized, high valence


Nitrogen and are contained in Component
metal ion. This ligand and/or attached,


6-Membered Heterocyclic Rings (N—N
uncoordinating hydrocarbon/rings may or may


Bidentates, N—N Tridentates, N—N
not have halogen or polarizing or water-


Tetradentates, or N—N Hexadentates)
insolubilizing groups attached.


N Valence Stabilizer #17:
Macrocyclic ligands containing at least one 6-


Four-, Six-, Eight-, or Ten-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide nitrogen binding sites


Macropolycyclics (including Catapinands,
to valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine or imine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Nitrogen and are contained in a
the total number of binding sites is four, six,


Combination of 6-Membered Heterocyclic
eight, or ten. Can include other


Rings and Amine or Imine Groups (N—N
hydrocarbon/ring systems bound to this


Bidentates, N—N Tridentates, N—N
macrocyclic ligand, but they do not coordinate


Tetradentates, or N—N Hexadentates)
with the stabilized, high valence metal ion. This



ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


N Valence Stabilizer #18:
R′—NH—C(—R)═N—R′′, where R, R′, and R′′


Amidines and Diamidines (N—N Bidentates
represent H or any organic functional group


and N—N Tetradentates)
wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #19:
RR′—N—C(═NH)—NR′′—C(═NH)—NR′′′R′′′′ for


Biguanides (Imidodicarbonimidic Diamides
biguanides, RR′—N—C(═NH)—NR′′—NH—C(═NH)—NR′′′R′′′′


or Dihydrazides), Biguanidines,
for biguanidines, where R, R′, R′′,


Imidotricarbonimidic Diamides or
R′′′, and R′′′′ represent H, NH2, or any organic


Dihydrazides, Imidotetracarbonimidic
functional group wherein the number of carbon


Diamides or Dihydrazides, Dibiguanides,
atoms ranges from 0 to 40, halogen or


Bis(biguanidines), Polybiguanides, and
polarizing or water-insolubilizing/solubilizing


Poly(biguanidines) (N—N Bidentates, N—N
groups attached. Ligand can also contain


Tridentates, N—N Tetradentates, and N—N
nonbinding N, O, S, or P atoms.


Hexadentates)


N Valence Stabilizer #20:
RR′—N—C(═NH)—CR′′R′′′—C(═NH)—NR′′′′R′′′′′,


Diamidinomethanes,
where R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent


Bis(amidinomethanes), and
H, NH2, or any organic functional group


Poly(amidinomethanes) (N—N Bidentates,
wherein the number of carbon atoms ranges


N—N Tridentates, N—N Tetradentates, and N—N
from 0 to 40, optionally having halogen or


Hexadentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #21:
RR′—N—C(═NH)—NR′′—C(═NH)—R′′′ for


Imidoylguanidines, Amidinoguanidines,
imidoylguanidines, and RR′—N—C(═NH)—NR′′—NH—C(═NH)—R′′′


Bis(imidoylguanidines),
for amidinoguanidines, where


Bis(amidinoguanidines),
R, R′, R′′, and R′′′ represent H, NH2, or any


Poly(imidoylguanidines), and
organic functional group wherein the number of


Poly(amidinoguanidines) (N—N Bidentates,
carbon atoms ranges from 0 to 40, optionally


N—N Tridentates, N—N Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #22:
RR′—N—C(═NH)—O—C(═NH)—NR′′R′′′, where R,


Diformamidine oxides (Dicarbonimidic
R′, R′′, and R′′′ represent H, NH2, or any


Diamides or Dihydrazides),
organic functional group wherein the number of


Tricarbonimidic Diamides or Dihydrazides,
carbon atoms ranges from 0 to 40, optionally


Tetracarbonimidic Diamides or
having halogen or polarizing or water-


Dihydrazides, Bis(diformamidine oxides),
insolubilizing/solubilizing groups attached.


and Poly(diformamidine oxides) (N—N
Ligand can also contain nonbinding N, O, S, or


Bidentates, N—N Tridentates, N—N
P atoms.


Tetradentates)


N Valence Stabilizer #23:
RR′—N—C(═NH)—S—C(═NH)—NR′′R′′′, where R,


Diformamidine Sulfides
R′, R′′, and R′′′ represent H, NH2, or any


(Thiodicarbonimidic Diamides or
organic functional group wherein the number of


Dihydrazides), Thiotricarbonimidic
carbon atoms ranges from 0 to 40, optionally


Diamides or Dihydrazides,
having halogen or polarizing or water-


Thiotetracarbonimidic Diamides or
insolubilizing/solubilizing groups attached.


Dihydrazides, Bis(diformamidine sulfides),
Ligand can also contain nonbinding N, O, S, or


and Poly(diformamidine sulfides) (N—N
P atoms.


Bidentates, N—N Tridentates, N—N


Tetradentates)


N Valence Stabilizer #24:
R—O—C(═NH)—NR′—C(═NH)—O—R′′ for


Imidodicarbonimidic Acids,
imidodicarbomimidic acids, and R—O—C(═NH)—NR′—NH—C(═NH)—O—R′′


Diimidodicarbonimidic Acids,
for


Imidotricarbonimidic Acids,
diimidodicarbonimidic acids, where R, R′, and


Imidotetracarbonimidic Acids, and
R′′ represent H, NH2, or any organic functional


derivatives thereof (N—N Bidentates, N—N
group wherein the number of carbon atoms


Tridentates, N—N Tetradentates, and N—N
ranges from 0 to 40, optionally having halogen


Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #25:
R—S—C(═NH)—NR′—C(═NH)—S—R′′ for


Thioimidodicarbonimidic Acids,
thioimidodicarbonimidic acids, and R—S—C(═NH)—NR′—NH—C(═NH)—S—R′′


Thiodiimidodicarbonimidic Acids,
for


Thioimidotricarbonimidic Acids,
thiodiimidodicarbonimidic acids, where R, R′,


Thioimidotetracarbonimidic Acids, and
and R′′ represent H, NH2, or any organic


derivatives thereof (N—N Bidentates, N—N
functional group wherein the number of carbon


Tridentates, N—N Tetradentates, and N—N
atoms ranges from 0 to 40, optionally having


Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #26:
R—C(═NH)—NR′—C(═NH)—R′′ for


Diimidoylimines, Diimidoylhydrazides,
diimidoylimines, and R—C(═NH)—NR′—NH—C(═NH)—R′′


Bis(diimidoylimines),
for diimidoylhydrazides, where R,


Bis(diimidoylhydrazides),
R′, and R′′ represent H, NH2, or any organic


Poly(diimidoylimines), and
functional group wherein the number of carbon


Poly(diimidoylhydrazides) (N—N
atoms ranges from 0 to 40, optionally having


Tridentates and N—N Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #27:
RR′—N—S(═NH)(═O)—OR′′ or RR′—N—S(═NH)(═O)—N—R′′R′′′


Imidosulfamides, Diimidosulfamides,
for imidosulfamides, and


Bis(imidosulfamides),
RR′—N—S(═NH)(═NH)—OR′′ or RR′—N—S(═NH)(═NH)—N—R′′R′′′


Bis(diimidosulfamides),
for diimidosulfamides,


Poly(imidosulfamides), and
where R, R′, R′′, and R′′′ represent H, NH2, or


Poly(diimidosulfamides) (N—N Bidentates,
any organic functional group wherein the


N—N Tridentates, N—N Tetradentates, and N—N
number of carbon atoms ranges from 0 to 40,


Hexadentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N Valence Stabilizer #28:
(NH═)P(—NRR′)(—NR′′R′′′)(—NR′′′′R′′′′′), where


Phosphoramidimidic Triamides,
R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2,


Bis(phosphoramidimidic triamides), and
or any organic functional group wherein the


Poly(phosphoramidimidic triamides) and
number of carbon atoms ranges from 0 to 40,


derivatives thereof (N—N Bidentates, N—N
optionally having halogen or polarizing or


Tridentates, N—N Tetradentates, and N—N
water-insolubilizing/solubilizing groups


Hexadentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N Valence Stabilizer #29:
(NH═)P(—NRR′)(OH)2 for phosphoramidimidic


Phosphoramidimidic Acid,
acid, and (NH═)P(—NRR′)(—NR′′R′′′)(OH) for


Phosphorodiamidimidic Acid,
phosphorodiamidimidic acid, where R, R′, R′′,


Bis(Phosphoramidimidic Acid),
and R′′′ represent H, NH2, or any organic


Bis(Phosphorodiamidimidic Acid),
functional group wherein the number of carbon


Poly(Phosphoramidimidic Acid),
atoms ranges from 0 to 40, optionally having


Poly(Phosphorodiamidimidic Acid), and
halogen or polarizing or water-


derivatives thereof (N—N Bidentates, N—N
insolubilizing/solubilizing groups attached.


Tridentates, N—N Tetradentates, and N—N
Ligand can also contain nonbinding N, O, S, or


Hexadentates)
P atoms.


N Valence Stabilizer #30:
(NH═)P(—NRR′)(SH)2 for


Phosphoramidimidodithioic Acid,
phosphoramidimidodithioic acid, and (NH═)P(—NRR′)(—NR′′R′′′)(SH)


Phosphorodiamidimidothioic Acid,
for


Bis(Phosphoramidimidodithioic Acid),
phosphorodiamidimidothioic acid, where R, R′,


Bis(Phosphorodiamidimidothioic Acid),
R′′, and R′′′ represent H, NH2, or any organic


Poly(Phosphoramidimidodithioic Acid),
functional group wherein the number of carbon


Poly(Phosphorodiamidimidothioic Acid),
atoms ranges from 0 to 40, optionally having


and derivatives thereof (N—N Bidentates, N—N
halogen or polarizing or water-


Tridentates, N—N Tetradentates, and N—N
insolubilizing/solubilizing groups attached.


Hexadentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #31:
R—N═N—R′ for azo compounds, R—N═N—NH—R′


Azo compounds including triazenes with
for triazenes, where R, and R′ represent H or


amino, imino, oximo, diazeno, or hydrazido
any organic functional group wherein the


substitution at the ortho-(for aryl) or alpha-
number of carbon atoms ranges from 0 to 40,


or beta-(for alkyl) positions, Bis[o-(H2N—)
optionally having halogen or polarizing or


or alpha- or beta-(H2N—)azo compounds], or
water-insolubilizing/solubilizing groups


Poly[o-(H2N—) or alpha- or beta-(H2N—)azo
attached. (Must include ortho-amino, imino,


compounds) (N—N Bidentates, N—N
oximo, diazeno, or hydrazido substituted aryl


Tridentates, N—N Tetradentates, or N—N
azo compounds, and alpha- or beta-amino,


Hexadentates)
imino, oximo, diazeno, or hydrazido alkyl azo



compounds.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #32:
R—N═N—C(═NH)—NR′R′′ for


Diazeneformimidamides
diazeneformimidamides, and R—N═N—CR′R′′—C(═NH)—NR′′′R′′′′


(Diazeneamidines), Diazeneacetimidamides
for diazeneacetimidamides,


(Diazene-alpha-amidinoalkanes(alkenes)),
where R, R′, R′′, R′′′, and R′′′′ represent H,


Bis(diazeneformimidamides),
NH2, or any organic functional group wherein


Bis(diazeneacetimidamides),
the number of carbon atoms ranges from 0 to


Poly(diazeneformimidamides), and
40, optionally having halogen or polarizing or


Poly(diazeneacetimidamides) (N—N
water-insolubilizing/solubilizing groups


Bidentates, N—N Tetradentates, and N—N
attached. Ligand can also contain nonbinding N,


Hexadentates)
O, S, or P atoms.


N Valence Stabilizer #33:
R—N═N—C(═NH)—OR′ for diazeneformimidic


Diazeneformimidic Acid,
acid, and R—N═N—CR′R′′—C(═NH)—OR′′′ for


Diazeneacetimidic Acid,
diazeneacetimidic acid, where R, R′, R′′, and


Bis(diazeneformimidic acid),
R′′′ represent H, NH2, or any organic functional


Bis(diazeneacetimidic acid),
group wherein the number of carbon atoms


Poly(diazeneformimidic acid),
ranges from 0 to 40, optionally having halogen


Poly(diazeneacetimidic acid), and
or polarizing or water-


derivatives thereof (N—N Bidentates, N—N
insolubilizing/solubilizing groups attached.


Tetradentates, and N—N Hexadentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #34:
R—N═N—C(═NH)—SR′ for


Diazeneformimidothioic Acid,
diazeneformimidothioic acid, and R—N═N—CR′R′′—C(═NH)—SR′′′


Diazeneacetimidothioic Acid,
for


Bis(diazeneformimidothioic acid),
diazeneacetimidothioic acid, where R, R′, R′′,


Bis(diazeneacetimidothioic acid),
and R′′′ represent H, NH2, or any organic


Poly(diazeneformimidothioic acid),
functional group wherein the number of carbon


Poly(diazeneacetimidothioic acid), and
atoms ranges from 0 to 40, optionally having


derivatives thereof (N—N Bidentates, N—N
halogen or polarizing or water-


Tetradentates, and N—N Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #35:
R—N═N—C(═NH)—R′ or R—N═N—CR′R′′—C(═NH)—R′′′,


Imidoyldiazenes, Bis(imidoyldiazenes), and
where R, R′, R′′, and R′′′


Poly(imidoyldiazenes), (N—N Bidentates, N—N
represent H, NH2, or any organic functional


Tetradentates and N—N Hexadentates)
group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #36:
RR′—N—C(═NH)—N═N—C(═NH)—NR′′R′′′ for diazenediformimidamides,


Diazenediformimidamides (1,2-
and RR′—N—C(═NH)—CR′′R′′′—N═N—CR′′′′R′′′′′—C(═NH)—NR′′′′′′R′′′′′′′


Diazenediamidines),
for diazenediacetimidamides, where R, R′, R′′,


Diazenediacetimidamides (1,2-Diazene-di-
R′′′, R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H,


alpha-amidinoalkanes(alkenes)),
NH2, or any organic functional group wherein


Bis(diazenediformimidamides),
the number of carbon atoms ranges from 0 to


Bis(diazenediacetimidamides),
40, optionally having halogen or polarizing or


Poly(diazenediformimidamides), and
water-insolubilizing/solubilizing groups


Poly(diazenediacetimidamides) (N—N
attached. Ligand can also contain nonbinding N,


Tridentates and N—N Hexadentates)
O, S, or P atoms.


N Valence Stabilizer #37:
RO—C(═NH)—N═N—C(═NH)—OR′ for


Diazenediformimidic Acid,
diazenediformimidic acid, and RO—C(═NH)—CR′R′′—N═N—CR′′′R′′′′—C(═NH)—OR′′′′′


Diazenediacetimidic Acid,
for


Bis(diazenediformimidic acid),
diazenediacetimidic acid, where R, R′, R′′, R′′′,


Bis(diazenediacetimidic acid),
R′′′′, and R′′′′′ represent H, NH2, or any organic


Poly(diazenediformimidic acid), and
functional group wherein the number of carbon


Poly(diazenediacetimidic acid), and
atoms ranges from 0 to 40, optionally having


derivatives thereof (N—N Tridentates and N—N
halogen or polarizing or water-


Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #38:
RS—C(═NH)—N═N—C(═NH)—SR′ for


Diazenediformimidothioic Acid,
diazenediformimidothioic acid, and RS—C(═NH)—CR′R′′—N═N—CR′′′R′′′′—C(═NH)—SR′′′′′


Diazenediacetimidothioic Acid,
for diazenediacetimidothioic acid, where R, R′,


Bis(diazenediformimidothioic acid),
R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2, or any


Bis(diazenediacetimidothioic acid),
organic functional group wherein the number of


Poly(diazenediformimidothioic acid), and
carbon atoms ranges from 0 to 40, optionally


Poly(diazenediacetimidothioic acid), and
having halogen or polarizing or water-


derivatives thereof (N—N Tridentates and N—N
insolubilizing/solubilizing groups attached.


Hexadentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #39:
R—C(═NH)—N═N—C(═NH)—R′′ or


Diimidoyldiazenes, Bis(diimidoyldiazenes),
R—C(═NH)—CR′R′′—N═N—CR′′′R′′′′—C(═NH)—R′′′′′,


and Poly(diimidoyldiazenes), (N—N
where R,


Tridentates and N—N Hexadentates)
R′, R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2, or



any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N Valence Stabilizer #40:
R—N═N—CR′═N—NR′′R′′′, where R, R′, R′′, and


Ortho-amino (or -hydrazido) Substituted
R′′′ represent H, or any organic functional


Formazans, Bis(o-amino or -hydrazido
group wherein the number of carbon atoms


substituted formazans), and Poly(o-amino
ranges from 0 to 40, optionally having halogen


or -hydrazido substituted formazans) (N—N
or polarizing or water-


Bidentates, N—N Tridentates, N—N
insolubilizing/solubilizing groups attached.


Tetradentates, and N—N Hexadentates)
(Must include ortho-amine or hydrazide



substituted aryl R derivatives, and beta-amine or



hydrazide substituted alkyl R derivatives.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #41:
RR′C═N—N═CR′′R′′′ or RR′C═N—NR′′R′′′ (for


Ortho-amino (or -hydrazido) Substituted
ketazines), where R, R′, R′′, and R′′′ represent


Azines (including ketazines), Bis(o-amino
H, or any organic functional group wherein the


or hydrazido substituted azines), and
number of carbon atoms ranges from 0 to 40,


Poly(o-amino or hydrazido substituted
optionally having halogen or polarizing or


azines) (N—N Bidentates, N—N Tridentates,
water-insolubilizing/solubilizing groups


N—N Tetradentates, and N—N Hexadentates)
attached. (Must include ortho-amine or



hydrazide substituted aryl R derivatives, and



beta-amine or hydrazide substituted alkyl R



derivatives.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #42:
RR′C═N—R′′, where R, R′, and R′′ represent H,


Schiff Bases with one Imine (C═N) Group
or any organic functional group wherein the


and with ortho- or alpha- or beta-amino or
number of carbon atoms ranges from 0 to 40,


imino or oximo or diazeno or hydrazido
optionally having halogen or polarizing or


substitution (N—N Bidentates, N—N
water-insolubilizing/solubilizing groups


Tridentates, N—N Tetradentates, N—N
attached. (Must contain ortho- or alpha- or beta-


Pentadentates, or N—N Hexadentates). Also
amino or imino or oximo or diazeno or


includes hydrazones with ortho-N
hydrazido substitution.) Ligand can also


substitution.
contain nonbinding N, O, S, or P atoms.


N Valence Stabilizer #43:
RR′C═N—R′′—N═CR′′′R′′′′ or R—N═C—R′—C═N—R′


Schiff Bases with two Imine (C═N) Groups
or RC═N—R′—N═CR′′, where R, R′, R′′, R′′′,


and without ortho- (for aryl constituents) or
and R′′′′ represent H, or any organic functional


alpha- or beta- (for alkyl constituents)
group wherein the number of carbon atoms


hydroxy, carboxy, carbonyl, thiol,
ranges from 0 to 40, optionally having halogen


mercapto, thiocarbonyl, amino, imino,
or polarizing or water-


oximo, diazeno, or hydrazido substitution
insolubilizing/solubilizing groups attached. (Not


(N—N Bidentates). Also includes
including ortho-, alpha-, or beta-hydroxy,


dihydrazones.
carboxy, carbonyl, thiol, mercapto,



thiocarbonyl, amino, imino, oximo, diazeno, or



hydrazido substitution.) Ligand can also



contain nonbinding N, O, S, or P atoms.


N Valence Stabilizer #44:
RR′C═N—R′′—N═CR′′′R′′′′ or R—N═C—R′—C═N—R′


Schiff Bases with two Imine (C═N) Groups
or RC═N—R′—N═CR′′, where R, R′, R′′, R′′′,


and with ortho- or alpha- or beta-amino or
and R′′′′ represent H, or any organic functional


imino or oximo or diazeno or hydrazido
group wherein the number of carbon atoms


substitution (N—N Tridentates, N—N
ranges from 0 to 40, optionally having halogen


Tetradentates, N—N Pentadentates, or N—N
or polarizing or water-


Hexadentates). Also includes hydrazones
insolubilizing/solubilizing groups attached.


with ortho-N substitution.
(Must contain ortho- or alpha- or beta-amino or



imino or oximo or diazeno or hydrazido



substitution.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #45:
N(—R—N═CR′R′′)3, where R, R′, and R′′


Schiff Bases with three Imine (C═N)
represent H, or any organic functional group


Groups and without ortho- (for aryl
wherein the number of carbon atoms ranges


constituents) or alpha- or beta- (for alkyl
from 0 to 40, optionally having halogen or


constituents) hydroxy, carboxy, carbonyl,
polarizing or water-insolubilizing/solubilizing


thiol, mercapto, thiocarbonyl, amino, imino,
groups attached. (Not including ortho-, alpha-,


oximo, diazeno, or hydrazido substitution
or beta-hydroxy, carboxy, carbonyl, thiol,


(N—N Tridentates). Also includes
mercapto, thiocarbonyl, amino, imino, oximo,


trihydrazones.
diazeno, or hydrazido substitution.) Ligand can



also contain nonbinding N, O, S, or P atoms.


N Valence Stabilizer #46:
N(—R—N═CR′R′′)3, where R, R′, and R′′


Schiff Bases with three Imine (C═N)
represent H, or any organic functional group


Groups and with ortho- or alpha- or beta-
wherein the number of carbon atoms ranges


amino or imino or oximo or diazeno or
from 0 to 40, optionally having halogen or


hydrazido substitution (N—N Tetradentates,
polarizing or water-insolubilizing/solubilizing


N—N Pentadentates, or N—N Hexadentates)
groups attached. (Must contain ortho- or alpha-



or beta-amino or imino or oximo or diazeno or



hydrazido substitution.) Ligand can also



contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #1:
Macrocyclic ligands containing two, four, or six


Macrocyclic, Macrobicyclic, and
thioketone binding sites to valence stabilize the


Macropolycyclic Oligothioketones
central metal ion. Can include other


(including Catapinands, Cryptands,
hydrocarbon or ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Thioketones
with the stabilized, high valence metal ion. This


(typically in the beta position) (S—S
ligand and/or attached, uncoordinating


Bidentates, S—S Tetradentates, and S—S
hydrocarbons/rings may or may not have


Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #2:
Macrocyclic ligands containing two, four, six,


Macrocyclic, Macrobicyclic, and
or eight 1,1-dithiolene binding sites to valence


Macropolycyclic Dithiolenes (including
stabilize the central metal ion. Can include other


Catapinands, Cryptands, Cyclidenes, and
hydrocarbon or ring systems bound to this


Sepulchrates) wherein all Binding Sites are
macrocyclic ligand, but they do not coordinate


composed of alpha, alpha dithiols (meaning
with the stabilized, high valence metal ion. This


two thiol groups on a single carbon atom in
ligand and/or attached, uncoordinating


the ring) (S—S Bidentates, S—S
hydrocarbons/rings may or may not have


Tetradentates, and S—S Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #3:
RC(═S)—NR′—C(═S)—R′′ for


Dithioimidodialdehydes,
dithioimidodialdehydes, and RC(═S)—NR′—NH—C(═S)—R′′


Dithiohydrazidodialdehydes (thioacyl
for dithiohydrazidodialdehydes


thiohydrazides),
(thioacyl thiohydrazides), where R, R′, and R′′


Bis(dithioimidodialdehydes),
represent H, NH2, or any organic functional


Bis(dithiohydrazidodialdehydes),
group wherein the number of carbon atoms


Poly(dithioimidodialdehydes), and
ranges from 0 to 40, optionally having halogen


Poly(dithiohydrazidodialdehydes) (S—S
or polarizing or water-


Bidentates, S—S Tridentates, S—S
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #4:
R—O—C(═S)—NR′—C(═S)—O—R′′ or R—S—C(═S)—NR′—C(═S)—S—R′′


Dithioimidodicarbonic acids,
for dithioimidodicarbonic


Dithiohydrazidodicarbonic acids,
acids, and R—O—C(═S)—NR′—NH—C(═S)—O—R′′ or


Bis(dithioimidodicarbonic acids),
R—S—C(═S)—NR′—NH—C(═S)—S—R′′ for


Bis(dithiohydrazidodicarbonic acids),
dithiohydrazidodicarbonic acids, where R, R′,


Poly(dithioimidodicarbonic acids),
and R′′ represent H, NH2, or any organic


Poly(dithiohydrazidodicarbonic acids) and
functional group wherein the number of carbon


derivatives thereof (S—S Bidentates, S—S
atoms ranges from 0 to 40, optionally having


Tridentates, S—S Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #5:
R—C(═S)—CR′ R′′—C(═S)—R′′′ where R, R′, R′′,


1,3-Dithioketones (Dithio-beta-ketonates),
and R′′′ represent H, NH2, or any organic


1,3,5-Trithioketones, Bis(1,3-
functional group wherein the number of carbon


Dithioketones), and Poly(1,3-
atoms ranges from 0 to 40, optionally having


Dithioketones) (S—S Bidentates, S—S
halogen or polarizing or water-


Tridentates, S—S Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #6:
R—C(═S)—C(═S)—R′ where R and R′ represent H,


1,2-Dithioketones (Dithiolenes, Dithio-
NH2, or any organic functional group wherein


alpha-ketonates), 1,2,3-Trithioketones,
the number of carbon atoms ranges from 0 to


Dithiotropolonates, ortho-Dithioquinones,
40, optionally having halogen or polarizing or


Bis(1,2-Dithioketones), and Poly(1,2-
water-insolubilizing/solubilizing groups


Dithioketones) (S—S Bidentates, S—S
attached. Ligand can also contain nonbinding N,


Tridentates, S—S Tetradentates)
O, S, or P atoms.


S Valence Stabilizer #7:
RR′—N—C(═S)—CR′′R′′′—C(═S)—N—R′′′′R′′′′′ where


Dithiomalonamides
R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2,


(Dithiomalonodiamides),
or any organic functional group wherein the


Bis(dithiomalonamides), and
number of carbon atoms ranges from 0 to 40,


Polydithiomalonamides (S—S Bidentates, S—S
optionally having halogen or polarizing or


Tridentates, S—S Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #8:
RR′—N—C(═S)—CR′′R′′′—C(═S)—R′′′′ where R, R′,


2-Thioacylthioacetamides, Bis(2-
R′′, R′′′, and R′′′′ represent H, NH2, or any


thioacylthioacetamides), and Poly(2-
organic functional group wherein the number of


thioacylthioacetamides) (S—S Bidentates, S—S
carbon atoms ranges from 0 to 40, optionally


Tridentates, S—S Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #9:
R—C(═S)—S—C(═S)—R′ where R and R′ represent


Dithioacyl sulfides, Bis(dithioacyl sulfides),
H or any organic functional group wherein the


and Poly(dithioacyl sulfides) (S—S
number of carbon atoms ranges from 0 to 40,


Bidentates, S—S Tridentates, S—S
optionally having halogen or polarizing or


Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #10:
RR′—N—C(═S)—S—C(═S)—N—R′′R′′′ where R, R′,


Trithiodicarbonic Diamides,
R′′, and R′′′ represent H, NH2 or any organic


Bis(trithiodicarbonic diamides), and
functional group wherein the number of carbon


Poly(trithiodicarbonic diamides) (S—S
atoms ranges from 0 to 40, optionally having


Bidentates, S—S Tridentates, S—S
halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #11:
R—S—C(═S)—S—C(═S)—S—R′ for


Pentathio-, Tetrathio-, or Trithiodicarbonic
pentathiodicarbonic acids, R—O—C(═S)—S—C(═S)—S—R′


Acids, Bis(pentathio-, tetrathio-, or
for tetrathiodicarbonic acids, and R—O—C(═S)—S—C(═S)—O—R′


trithiodicarbonic acids), Poly(pentathio-,
for pentathiodicarbonic


tetrathio-, or trithiodicarbonic acids), and
acids, where R and R′ represent H, NH2 or any


derivatives thereof (S—S Bidentates, S—S
organic functional group wherein the number of


Tridentates, S—S Tetradentates)
carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #12:
(R—O—)(R′—O—)P(═S)—P(═S)(—O—R′′)(—O—R′′′);


Dithiohypophosphoric Acids,
(R—O—)(R′—S—)P(═S)—P(═S)(—S—R′′)(—O—R′′′); or


Bis(dithiohypophosphoric acids), and
(R—S—)(R′—S—)P(═S)—P(═S)(—S—R′′)(—S—R′′′), where


Poly(dithiohypophosphoric acids), and


derivatives thereof (S—S Bidentates, S—S
R, R′, R′′, and R′′′ represent H, NH2 or any


Tridentates, S—S Tetradentates)
organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms. Note: these ligands are not to be



confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)



R′′R′′′P(═O) which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


S Valence Stabilizer #13:
(RR′—N—)(R′′R′′′—N—)P(═S)—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Dithiohypophosphoramides,
where R, R′, R′′, R′′′,


Bis(dithiohypophosphoramides), and
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Poly(dithiohypophosphoramides) (S—S
any organic functional group wherein the


Bidentates, S—S Tridentates, S—S
number of carbon atoms ranges from 0 to 40,


Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms. Note: these ligands are not to



be confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)R′′R′′′P(═O)



which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


S Valence Stabilizer #14:
(R—O—)(R′—O—)P(═S)—NH—P(═S)(—O—R′′)(—O—R′′′);


Dithioimidodiphosphoric Acids,
(R—O—)(R′—S—)P(═S)(—S—R′′)—(—NH—P(═S)(—S—R′′)(—O—R′′′);


Dithiohydrazidodiphosphoric Acids,
or (R—S—)(R′—S—)P(═S)—NH—P(═S)(—S—R′′)(—S—R′′′)


Bis(dithioimidodiphosphoric Acids),
for dithioimidodiphosphoric acids, and —NH—NH-


Bis(dithiohydrazidodiphosphoric Acids),
derivatives for


Poly(dithioimidodiphosphoric Acids),
dithiohydrazidodiphosphoric acids, where R,


Poly(dithiohydrazidodiphosphoric Acids),
R′, R′′, and R′′′ represent H, NH2 or any organic


and derivatives thereof (S—S Bidentates, S—S
functional group wherein the number of carbon


Tridentates, S—S Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #15:
(RR′—N—)(R′′R′′′—N—)P(═S)—NH—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′)


Dithioimidodiphosphoramides,
for


Dithiohydrazidodiphosphoramides,
dithioimidophosphoramides, and


Bis(dithioimidodiphosphoramides),
(RR′—N—)(R′′R′′′—N—)P(═S)—NH—NH—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′) for


Bis(dithiohydrazidodiphosphoramides),
dithiohydrazidodiphosphoramides, where R, R′,


Poly(dithioimidodiphosphoramides), and
R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent


Poly(dithiohydrazidodiphosphoramides) (S—S
H, NH2 or any organic functional group wherein


Bidentates, S—S Tridentates, S—S
the number of carbon atoms ranges from 0 to


Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #16:
(RR′—N—)(R′′R′′′—N—)P(═S)—S—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Dithiodiphosphoramides,
or (RR′—N—)(R′′R′′′—N—)P(═S)—O—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Bis(dithioiphosphoramides), and
where R, R′, R′′, R′′′, R′′′′, R′′′′′,


Poly(dithiodiphosphoramides) (S—S
R′′′′′′, and R′′′′′′′ represent H, NH2 or any


Bidentates, S—S Tridentates, S—S
organic functional group wherein the number of


Tetradentates)
carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #17:
(R—O—)(R′—O—)P(═S)—O—P(═S)(—O—R′′)(—O—R′′′);


Dithiodiphosphoric Acids,
(R—O—)(R′—O—)P(═S)—O—P(═S)(—O—R′′)(—O—R′′′);


Bis(dithioiphosphoric Acids),
(R—O—)(R′—S—)P(═S)—O—P(═S)(—S—R′′)(—O—R′′′);


Poly(dithiodiphosphoric Acids), and
(R—O—)(R′—S—)P(═S)—S—P(═S)(—S—R′′)(—O—R′′′); or


derivatives thereof (S—S Bidentates, S—S
(R—S—)(R′—S—)P(═S)—S—P(═S)(—S—R′′)(—S—R′′′),


Tridentates, S—S Tetradentates)
where R, R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and



R′′′′′′′ represent H, NH2 or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #18:
(O═)P(—S—R)(—S—R′)(—S—R′′) or (S═)P(—S—R)(—S—R′)(—O—R′′),


Trithiophosphoric Acids
where R, R′, and R′′ represent H,


(Phosphorotrithioic Acids),
NH2 or any organic functional group wherein


Bis(trithiophosphoric acids),
the number of carbon atoms ranges from 0 to


Poly(trithiophosphoric acids), and
40, optionally having halogen or polarizing or


derivatives thereof (S—S Bidentates, S—S
water-insolubilizing/solubilizing groups


Tridentates, S—S Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #19:
(O═)P(—S—R)(—S—R′)(—O—R′′) or (S═)P(—S—R)(—O—R′)(—O—R′′),


Dithiophosphoric Acids (Phosphorodithioic
where R, R′, and R′′ represent H,


Acids), Bis(dithiophosphoric acids),
NH2 or any organic functional group wherein


Poly(dithiophosphoric acids), and
the number of carbon atoms ranges from 0 to


derivatives thereof (S—S Bidentates, S—S
40, optionally having halogen or polarizing or


Tridentates, S—S Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #20:
(S═)P(—S—R)(—S—R′)(—S—R′′), where R, R′, and R′′


Tetrathiophosphoric Acids
represent H, NH2 or any organic functional


(Phosphorotetrathioic Acids),
group wherein the number of carbon atoms


Bis(tetrathiophosphoric acids),
ranges from 0 to 40, optionally having halogen


Poly(tetrathiophosphoric acids), and
or polarizing or water-


derivatives thereof (S—S Bidentates, S—S
insolubilizing/solubilizing groups attached.


Tridentates, S—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #21:
(O═)P(—S—S—R)(—S—R′)(—S—R′′) or (S═)P(—S—S—R)(—S—R′)(—O—R′′),


Phosphoro(dithioperoxo)dithioic Acids,
where R, R′, and R′′


Bis[phosphoro(dithioperoxo)dithioic
represent H, NH2 or any organic functional


Acids],
group wherein the number of carbon atoms


Poly[phosphoro(dithioperoxo)dithioic
ranges from 0 to 40, optionally having halogen


Acids], and derivatives thereof (S—S
or polarizing or water-


Bidentates, S—S Tridentates, S—S
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #22:
(O═)P(—S—S—R)(—S—R′)(—O—R′′) or (S═)P(—S—S—R)(—O—R′)(—O—R′′),


Phosphoro(dithioperoxo)thioic Acids,
where R, R′, and R′′


Bis[phosphoro(dithioperoxo)thioic Acids],
represent H, NH2 or any organic functional


Poly[phosphoro(dithioperoxo)thioic Acids],
group wherein the number of carbon atoms


and derivatives thereof (S—S Bidentates, S—S
ranges from 0 to 40, optionally having halogen


Tridentates, S—S Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #23:
(S═)P(—S—S—R)(—S—R′)(—S—R′′), where R, R′, and


Phosphoro(dithioperoxo)trithioic Acids,
R′′ represent H, NH2 or any organic functional


Bis[phosphoro(dithioperoxo)trithioic
group wherein the number of carbon atoms


Acids],
ranges from 0 to 40, optionally having halogen


Poly[phosphoro(dithioperoxo)trithioic
or polarizing or water-


Acids], and derivatives thereof (S—S
insolubilizing/solubilizing groups attached.


Bidentates, S—S Tridentates, S—S
Ligand can also contain nonbinding N, O, S, or


Tetradentates)
P atoms.


S Valence Stabilizer #24:
R—CR′ (—SH)—CH2—C(═S)—R′′, where R, R′, and


Beta-Mercaptothioketones, Beta-
R′′ represent H, NH2 or any organic functional


Mercaptothioaldehydes, Bis(beta-
group wherein the number of carbon atoms


mercaptothioketones), Bis(beta-
ranges from 0 to 40, optionally having halogen


mercaptothioaldehydes), Poly(beta-
or polarizing or water-


mercaptothioketones), and Poly(beta-
insolubilizing/solubilizing groups attached.


mercaptothioaldehydes) (S—S Bidentates, S—S
Ligand can also contain nonbinding N, O, S, or


Tridentates, S—S Tetradentates)
P atoms.


S Valence Stabilizer #25:
RR′—N—CH(—SH)—NR′′—C(═S)—NR′′′R′′′′, where


N-(Aminomethylthiol)thioureas [N-
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


(Aminomercaptomethyl)thioureas], Bis[N-
organic functional group wherein the number of


(aminomethylthiol)thioureas], and Poly[N-
carbon atoms ranges from 0 to 40, optionally


(aminomethylthiol)thioureas] (S—S
having halogen or polarizing or water-


Bidentates, S—S Tridentates, S—S
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #26:
RR′—N—C(═S)—C(═S)—N—R′′R′′′, where R, R′,


Dithiooxamides, Bis(dithiooxamides), and
R′′, and R′′′ represent H, NH2 or any organic


Poly(dithiooxamides) (S—S Bidentates, S—S
functional group wherein the number of carbon


Tridentates, S—S Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #27:
RR′—C═C(—S−)(—S−), where R and R′ represent H,


1,1-Dithiolates, Bis(1,1-dithiolates), and
NH2 or any organic functional group wherein


Poly(1,1-dithiolates) (S—S Bidentates and S—S
the number of carbon atoms ranges from 0 to


Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #28:
R—C(═S)(—S—R′) for dithiomonocarboxylic acids,


Dithiomonocarboxylic Acids, Tri- and
and (R—S—)(S═)C—R′—C(═S)(—S—R′′) for tri- and


Tetrathiodicarboxylic Acids,
tetrathiodicarboxylic acids, where R, R′, and R′′


Bis(dithiomonocarboxylic Acids), Bis(tri-
represent H, NH2 or any organic functional


and tetrathiodicarboxylic acids),
group wherein the number of carbon atoms


Poly(dithiomonocarboxylic acids), Poly(tri-
ranges from 0 to 40, optionally having halogen


and tetrathiodicarboxylic acids), and
or polarizing or water-


derivatives thereof (S—S Bidentates and S—S
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #29:
R—C(═S)(—S—S—R′) for perthiomonocarboxylic


Perthiomonocarboxylic Acids,
acids, and (R—S—S—)(S═)C—R′—C(═S)(—S—S—R′′)


Perthiodicarboxylic Acids,
for perthiodicarboxylic acids, where R, R′, and


Bis(perthiomonocarboxylic acids),
R′′ represent H, NH2 or any organic functional


Bis(perthiodicarboxylic acids),
group wherein the number of carbon atoms


Poly(perthiomonocarboxylic acids),
ranges from 0 to 40, optionally having halogen


Poly(perthiodicarboxylic acids), and
or polarizing or water-


derivatives thereof (S—S Bidentates and S—S
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #30:
R—S—C(═S)—O—R′ or R—S—C(═O)—S—R′ for


Dithiocarbonates, Trithiocarbonates,
dithiocarbonates, R—S—C(═S)—S—R′ for


Perthiocarbonates, Bis(dithiocarbonates),
trithiocarbonates, and R—S—S—C(═S)—S—R′ for


Bis(trithiocarbonates), and
perthiocarbonates, where R, and R′ represent H,


Bis(perthiocarbonates) (S—S Bidentates and
NH2 or any organic functional group wherein


S—S Tetradentates)
the number of carbon atoms ranges from 0 to



40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #31:
RR′N+═C(SH)(SH), where R and R′ represent


Dithiocarbamates, Bis(dithiocarbamates),
H, OH, SH, OR′′ (R′′ = C1–C30 alkyl or aryl),


and Poly(dithiocarbamates) (including N-
SR′′ (R′′ = C1–C30 alkyl or aryl), NH2 or any


hydroxydithiocarbamates and N-
organic functional group wherein the number of


mercaptodithiocarbamates) (S—S Bidentates,
carbon atoms ranges from 0 to 40, optionally


S—S Tridentates, and S—S Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #32:
RR′N—NR′′—C(═S)(SH), where R and R′


Dithiocarbazates (Dithiocarbazides),
represent H, NH2 or any organic functional


Bis(dithiocarbazates), and
group wherein the number of carbon atoms


Poly(dithiocarbazates) (S—S Bidentates, S—S
ranges from 0 to 40, optionally having halogen


Tridentates, and S—S Tetradentates; or
or polarizing or water-


possibly N—S Bidentates, N—S Tridentates,
insolubilizing/solubilizing groups attached.


and N—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #33:
Thiocyanates bound directly to the high valence


Thiocyanate ligands (S Monodentates)
metal ion.


O Valence Stabilizer #1:
RR′—N—C(═O)—NR′′—C(═O)—NR′′′R′′′′ for


Biurets (Imidodicarbonic Diamides),
biurets, and RR′—N—C(═O)—NR′′—NH—C(═O)—NR′′′R′′′′


Isobiurets, Biureas, Triurets, Triureas,
for biureas, where R, R′, R′′, R′′′, and


Bis(biurets), Bis(isobiurets), Bis(biureas),
R′′′′ represent H, NH2, or any organic functional


Poly(biurets), Poly(isobiurets), and
group wherein the number of carbon atoms


Poly(biureas) (O—O Bidentates, O—O
ranges from 0 to 40, optionally having halogen


Tridentates, O—O Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #2:
RR′—N—C(═O)—NR′′—C(═O)—R′′′ where R, R′,


Acylureas, Aroylureas, Bis(acylureas),
R′′, and R′′′ represent H, NH2, or any organic


Bis(aroylureas), Poly(acylureas), and
functional group wherein the number of carbon


Poly(aroylureas) (O—O Bidentates, O—O
atoms ranges from 0 to 40, optionally having


Tridentates, O—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #3:
RC(═O)—NR′—C(═O)—R′′ for imidodialdehydes,


Imidodialdehydes, Hydrazidodialdehydes
and RC(═O)—NR′—NH—C(═O)—R′′ for


(Acyl hydrazides), Bis(imidodialdehydes),
hydrazidodialdehydes (acyl hydrazides), where


Bis(hydrazidodialdehydes),
R, R′, and R′′ represent H, NH2, or any organic


Poly(imidodialdehydes), and
functional group wherein the number of carbon


Poly(hydrazidodialdehydes) (O—O
atoms ranges from 0 to 40, optionally having


Bidentates, O—O Tridentates, O—O
halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #4:
R—O—C(═O)—NR′—C(═O)—O—R′′ for


Imidodicarbonic acids,
imidodicarbonic acids, and R—O—C(═O)—NR′—NH—C(═O)—O—R′′


Hydrazidodicarbonic acids,
for hydrazidodicarbonic acids,


Bis(imidodicarbonic acids),
where R, R′, and R′′ represent H, NH2, or any


Bis(hydrazidodicarbonic acids),
organic functional group wherein the number of


Poly(imidodicarbonic acids),
carbon atoms ranges from 0 to 40, optionally


Poly(hydrazidodicarbonic acids) and
having halogen or polarizing or water-


derivatives thereof (O—O Bidentates, O—O
insolubilizing/solubilizing groups attached.


Tridentates, O—O Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #5:
RR′—N—S(═O)(═O)—NR′′—S(═O)(═O)—NR′′′R′′′′


Imidodisulfamic Acid, Imidodisulfuric
for imidodisulfamic acid, and R—O—S(═O)(═O)—NR′—S(═O)(═O)—OR′′


Acid, Bis(Imidodisulfamic Acid),
for imidosulfuric acid,


Bis(Imidodisulfuric Acid),
where R, R′, and R′′ represent H, NH2, or any


Poly(Imidodisulfamic Acid), and
organic functional group wherein the number of


Poly(Imidodisulfuric Acid) and derivatives
carbon atoms ranges from 0 to 40, optionally


thereof (O—O Bidentates, O—O Tridentates,
having halogen or polarizing or water-


O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #6:
R—C(═O)—CR′R′′—C(═O)—R′′′ where R, R′, R′′,


1,3-Diketones (Beta-Diketonates), 1,3,5-
and R′′′ represent H, NH2, or any organic


Triketones, Bis(1,3-Diketones), and
functional group wherein the number of carbon


Poly(1,3-Diketones), all with a Molecular
atoms ranges from 0 to 40, optionally having


Weight Greater than 125 (O—O Bidentates,
halogen or polarizing or water-


O—O Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms. If these ligands exhibit a molecular



weight less than or equal to 125, the solubility



of the resultant Mn+3-diketonate complex will



be too high.


O Valence Stabilizer #7:
R—C(═O)—C(═O)—R′ where R and R′ represent


1,2-Diketones (Alpha-Diketonates), 1,2,3-
H, NH2, or any organic functional group


Triketones, Tropolonates, ortho-Quinones,
wherein the number of carbon atoms ranges


Bis(1,2-Diketones), and Poly(1,2-
from 0 to 40, optionally having halogen or


Diketones), all with a Molecular Weight
polarizing or water-insolubilizing/solubilizing


Greater than 100 (O—O Bidentates, O—O
groups attached. Ligand can also contain


Tridentates, O—O Tetradentates)
nonbinding N, O, S, or P atoms. If these ligands



exhibit a molecular weight less than or equal to



100, the solubility of the resultant Mn+3-



diketonate complex will be too high.


O Valence Stabilizer #8:
RR′—N—C(═O)—CR′′R′′′—C(═O)—N—R′′′′R′′′′′


Malonamides (Malonodiamides),
where R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent H,


Bis(malonamides), and Polymalonamides
NH2, or any organic functional group wherein


(O—O Bidentates, O—O Tridentates, O—O
the number of carbon atoms ranges from 0 to


Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


O Valence Stabilizer #9:
RR′—N—C(═O)—CR′′R′′′—C(═O)—R′′′′ where R, R′,


2-Acylacetamides, Bis(2-acylacetamides),
R′′, R′′′, and R′′′′ represent H, NH2, or any


and Poly(2-acylacetamides) (O—O
organic functional group wherein the number of


Bidentates, O—O Tridentates, O—O
carbon atoms ranges from 0 to 40, optionally


Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #10:
RR′—N—C(═O)—S—C(═O)—N—R′′R′′′ where R, R′,


Monothiodicarbonic Diamides,
R′′, and R′′′ represent H, NH2 or any organic


Bis(monothiodicarbonic diamides), and
functional group wherein the number of carbon


Poly(monothiodicarbonic diamides) (O—O
atoms ranges from 0 to 40, optionally having


Bidentates, O—O Tridentates, O—O
halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #11:
R—O—C(═O)—S—C(═O)—O—R′, where R and R′


Monothiodicarbonic Acids,
represent H, NH2 or any organic functional


Bis(monothiodicarbonic acids),
group wherein the number of carbon atoms


Poly(monothiodicarbonic acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (O—O Bidentates, O—O
or polarizing or water-


Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #12:
R—O—S(═O)(═O)—S—S(═O)(═O)—O—R′, where R


Trithionic acid, Bis(trithionic acid),
and R′ represent H, NH2 or any organic


Poly(trithionic acid), and derivatives
functional group wherein the number of carbon


thereof (O—O Bidentates, O—O Tridentates,
atoms ranges from 0 to 40, optionally having


O—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #13:
(R—O—)(R′—O—)P(═O)—P(═O)(—O—R′′)(—O—R′′′),


Hypophosphoric Acids,
where R, R′, R′′, and R′′′ represent H, NH2 or


Bis(hypophosphoric acids), and
any organic functional group wherein the


Poly(hypophosphoric acids), and
number of carbon atoms ranges from 0 to 40,


derivatives thereof (O—O Bidentates, O—O
optionally having halogen or polarizing or


Tridentates, O—O Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms. Note: these ligands are not to



be confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)R′′R′′′P(═O)



which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


O Valence Stabilizer #14:
(RR′—N—)(R′′R′′′—N—)P(═O)—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Hypophosphoramides,
where R, R′, R′′, R′′′,


Bis(hypophosphoramides), and
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Poly(hypophosphoramides) (O—O
any organic functional group wherein the


Bidentates, O—O Tridentates, O—O
number of carbon atoms ranges from 0 to 40,


Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms. Note: these ligands are not to



be confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)R′′R′′′P(═O)



which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


O Valence Stabilizer #15:
(R—O—)(R′—O—)P(═O)—NH—P(═O)(—O—R′′)(—O—R′′′)


Imidodiphosphoric Acids,
for imidodiphosphoric acids, and


Hydrazidodiphosphoric Acids,
(R—O—)(R′—O—)P(═O)—NH—NH—P(═O)(—O—R′′)(—O—R′′′)


Bis(imidodiphosphoric Acids),
for hydrazidodiphosphoric acids; where R, R′,


Bis(hydrazidodiphosphoric Acids),
R′′, and R′′′ represent H, NH2 or any organic


Poly(imidodiphosphoric Acids),
functional group wherein the number of carbon


Poly(hydrazidodiphosphoric Acids), and
atoms ranges from 0 to 40, optionally having


derivatives thereof (O—O Bidentates, O—O
halogen or polarizing or water-


Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #16:
(RR′—N—)(R′′R′′′—N—)P(═O)—NH—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′)


Imidodiphosphoramides,
for


Hydrazidodiphosphoramides,
imidodiphosphoramides, and —NH—NH-


Bis(imidodiphosphoramides),
derivatives for hydrazidodiphosphoramides,


Bis(hydrazidodiphosphoramides),
where R, R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and


Poly(imidodiphosphoramides), and
R′′′′′′′ represent H, NH2 or any organic


Poly(hydrazidodiphosphoramides) (O—O
functional group wherein the number of carbon


Bidentates, O—O Tridentates, O—O
atoms ranges from 0 to 40, optionally having


Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #17:
(RR′—N—)(R′′R′′′—N—)P(═O)—O—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Diphosphoramides, Bis(diphosphoramides),
where R, R′, R′′, R′′′,


and Poly(diphosphoramides) (O—O
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Bidentates, O—O Tridentates, O—O
any organic functional group wherein the


Tetradentates)
number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


O Valence Stabilizer #18:
R—CR′(—OH)—CH2—C(═O)—R′′, where R, R′, and


Beta-Hydroxyketones, Beta-
R′′ represent H, NH2 or any organic functional


Hydroxyaldehydes, Bis(beta-
group wherein the number of carbon atoms


hydroxyketones), Bis(beta-
ranges from 0 to 40, optionally having halogen


hydroxyaldehydes), Poly(beta-
or polarizing or water-


hydroxyketones), and Poly(beta-
insolubilizing/solubilizing groups attached.


hydroxyaldehydes) (O—O Bidentates, O—O
Ligand can also contain nonbinding N, O, S, or


Tridentates, O—O Tetradentates)
P atoms.


O Valence Stabilizer #19:
RR′—N—CH(—OH)—NR′′—C(═O)—NR′′′R′′′′, where


N-(Aminomethylol)ureas [N-
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


(Aminohydroxymethyl)ureas], Bis[N-
organic functional group wherein the number of


(aminomethylol)ureas], and Poly[N-
carbon atoms ranges from 0 to 40, optionally


(aminomethylol)ureas] (O—O Bidentates, O—O
having halogen or polarizing or water-


Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #20:
RR′—N—C(═O)—C(═O)—N—R′′R′′′, where R, R′,


Oxamides, Bis(oxamides), and
R′′, and R′′′ represent H, NH2 or any organic


Poly(oxamides) (O—O Bidentates, O—O
functional group wherein the number of carbon


Tridentates, O—O Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #21:
—C(—OH)═C(—OH)—, where the two carbon atoms


Squaric Acids and derivatives thereof (O—O
supporting the hydroxy groups are included


Bidentates)
within a cyclic hydrocarbon moiety, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #22:
(R—O—)(O═)C—R′—C(═O)(—O—R′′), where R, R′,


Dicarboxylic Acids, Bis(dicarboxylic
and R′′ represent H, NH2 or any organic


acids), Poly(dicarboxylic acids), and
functional group wherein the number of carbon


derivatives thereof (O—O Bidentates and O—O
atoms ranges from 0 to 40, optionally having


Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #23:
RR′N+═C(OH)(OH), where R and R′ represent


Carbamates, Bis(carbamates), and
H, OH, SH, OR′′ (R′′ = C1–C30 alkyl or aryl),


Poly(carbamates) (including N-
SR′′ (R′′ = C1–C30 alkyl or aryl), NH2 or any


hydroxycarbamates and N-
organic functional group wherein the number of


mercaptocarbamates) (O—O Bidentates, O—O
carbon atoms ranges from 0 to 40, optionally


Tridentates, and O—O Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #24:
RN═C(OH)(OH), where R represents H, NH2 or


Carbimates, Bis(carbimates), and
any organic functional group wherein the


Poly(carbimates) (O—O Bidentates, O—O
number of carbon atoms ranges from 0 to 40,


Tridentates, and O—O Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


O Valence Stabilizer #25:
Cyanates bound directly to the high valence


Cyanate ligands (O Monodentates)
metal ion.


N—S Valence Stabilizer #1:
RR′—N—C(═NH)—S—S—C(═NH)—NR′′R′′′, where


Diformamidine Disulfides
R, R′, R′′, and R′′′ represent H, NH2, or any


(Thioperoxydicarbonimidic Diamides or
organic functional group wherein the number of


Dihydrazides), Thioperoxytricarbonimidic
carbon atoms ranges from 0 to 40, optionally


Diamides or Dihydrazides,
having halogen or polarizing or water-


Thioperoxytetracarbonimidic Diamides or
insolubilizing/solubilizing groups attached.


Dihydrazides, Bis(diformamidine
Ligand can also contain nonbinding N, O, S, or


disulfides), and Poly(diformamidine
P atoms.


disulfides) (N—S Bidentates, N—S


Tridentates, N—S Tetradentates)


N—S Valence Stabilizer #2:
RR′—N—C(═NH)—S—CS—NR′′R′′′, where R, R′,


S-Amidinodithiocarbamates, Bis(S-
R′′, and R′′′ represent H, NH2 or any organic


amidinodithiocarbamates), and Poly(S-
functional group wherein the number of carbon


amidinodithiocarbamates) (N—S Bidentates
atoms ranges from 0 to 40, optionally having


and N—S Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #3:
RR′—N—C(═NH)—O—CS—NR′′R′′′, where R, R′,


O-Amidinothiocarbamates, Bis(O-
R′′, and R′′′ represent H, NH2 or any organic


amidinothiocarbamates), and Poly(O-
functional group wherein the number of carbon


amidinothiocarbamates) (N—S Bidentates
atoms ranges from 0 to 40, optionally having


and N—S Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #4:
RR′—N—C(═NH)—S—S—CS—NR′′R′′′, where R, R′,


S-Amidinoperoxythiocarbamates, Bis(S-
R′′, and R′′′ represent H, NH2 or any organic


amidinoperoxythiocarbamates), and Poly(S-
functional group wherein the number of carbon


amidinoperoxythiocarbamates) (N—S
atoms ranges from 0 to 40, optionally having


Bidentates and N—S Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #5:
(NH═)P(—SR)(—OR′)(—OR′′) for


Phosphorimidothioic Acid;
phosphorimidothioic acid, (NH═)P(—SR)(—SR′)(—OR′′)


Phosphorimidodithioic Acid;
for phosphorimidodithioic acid, (NH═)P(—SR)(—SR′)(—SR′′)


Phosphorimidotrithioic Acid;
for phosphorimidotrithioic


Bis(Phosphorimidothioic Acid);
acid, where R, R′, and R′′ represent H, NH2 or


Bis(Phosphorimidodithioic Acid);
any organic functional group wherein the


Bis(Phosphorimidotrithioic Acid);
number of carbon atoms ranges from 0 to 40,


Poly(Phosphorimidothioic Acid);
optionally having halogen or polarizing or


Poly(Phosphorimidodithioic Acid);
water-insolubilizing/solubilizing groups


Poly(Phosphorimidotrithioic Acid); and
attached. Ligand can also contain nonbinding N,


derivatives thereof (N—S Bidentates and N—S
O, S, or P atoms.


Tetradentates)


N—S Valence Stabilizer #6:
(S═)P(—NRR′)(—NR′′R′′′)(—NR′′′′R′′′′′), where R,


Phosphorothioic Triamides,
R′, R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2 or


Bis(phosphorothioic triamides), and
any organic functional group wherein the


Poly(phosphorothioic triamides) (N—S
number of carbon atoms ranges from 0 to 40,


Bidentates and N—S Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #7:
(S═)P(—NRR′)(—SR′′)(—SR′′′) for


Phosphoramidotrithioic Acid,
phosphoramidotrithioic acid, and (S═)P(—NRR′)(—NR′′R′′′)(—SR′′′′)


Phosphorodiamidodithioic Acid,
for


Bis(phosphoramidotrithioic acid),
phosphorodiamidodithioic acid, where R, R′,


Bis(phosphorodiamidodithioic acid),
R′′, R′′′, and R′′′′ represent H, NH2 or any


poly(phosphoramidotrithioic acid),
organic functional group wherein the number of


poly(phosphorodiamidodithioic acid), and
carbon atoms ranges from 0 to 40, optionally


derivatives thereof (N—S Bidentates and N—S
having halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #8:
(O═)P(—NRR′)(—SR′′)(—OR′′′) or (S═)P(—NRR′)(—OR′′)(—OR′′′)


Phosphoramidothioic Acid,
for phosphoramidothioic


Phosphoramidodithioic Acid,
acid; (O═)P(—NRR′)(—SR′′)(—SR′′′) or (S═)P(—NRR′)(—SR′′)(—OR′′′)


Phosphorodiamidothioic Acid,
for


Bis(Phosphoramidothioic Acid),
phosphoramidodithioic acid; (O═)P(—NRR′)(—NR′′R′′′)(—SR′′′′)


Bis(Phosphoramidodithioic Acid),
or (S═)P(—NRR′)(—NR′′R′′′)(—OR′′′′)


Bis(Phosphorodiamidothioic Acid),
for phosphorodiamidothioic acid, where


Poly(Phosphoramidothioic Acid),
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


Poly(Phosphoramidodithioic Acid), and
organic functional group wherein the number of


Poly(Phosphorodiamidothioic Acid) (N—S
carbon atoms ranges from 0 to 40, optionally


Bidentates and N—S Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #9:
R′—C(═S)—N═C(—R)(—NHR′′), where R is an


N—Thioacyl 7-Aminobenzylidenimines (N—S
aromatic derivative (i.e. —C6H5), and R′ and R′′


Bidentates or N—S Tetradentates)
represent H, NH2, or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #10:
R—C(═S)—NR′—OH or R—C(—SH)═N—OH, where


Thiohydroxamates (Thiohydroxylamines),
R and R′ represent H, NH2, or any organic


Bis(thiohydroxamates), and
functional group wherein the number of carbon


Poly(thiohydroxamates) (N—S Bidentates,
atoms ranges from 0 to 40, optionally having


N—S Tetradentates, and N—S Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #11:
R—CH(—NHR′)—C(═S)(—OH) or R—CH(—NHR′)—C(═S)(—SH)


Alpha- or ortho-Aminothiocarboxylic
for aminothiocarboxylic acids, and


Acids, and alpha- or ortho-
(HO—)(S═)C—CH(—NHR)—R′—CH(—NHR′′)—C(═S)(—OH)


Aminothiodicarboxylic Acids, and
or (HS—)(S═)C—CH(—NHR)—R′—CH(—NHR′′)—C(═S)(—SH)


derivatives thereof (N—S Bidentates, N—S
for


Tridentates, and N—S Tetradentates)
aminothiodicarboxylic acids, where R, R′, and



R′′ represent any organic functional group



wherein the number of carbon atoms ranges



from 1 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #12:
RR′—N—C(═S)—NR′′—N═CR′′′R′′′′, where R, R′,


Thiosemicarbazones,
R′′, R′′′, and R′′′′ represent H, or any organic


Bis(thiosemicarbazones), and
functional group wherein the number of carbon


Poly(thiosemicarbazones) (N—S Bidentates,
atoms ranges from 0 to 40, optionally having


N—S Tetradentates, and N—S Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #13:
R—C(═S)—NR′—N═CR′′R′′′, where R, R′, R′′, and


Thioacyl hydrazones, Bis(thioacyl
R′′′ represent H, or any organic functional


hydrazones), and Poly(thioacyl hydrazones)
group wherein the number of carbon atoms


(N—S Bidentates, N—S Tetradentates, and N—S
ranges from 0 to 40, optionally having halogen


Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #14:
R—N═N—C(═S)—NR′—NR′′R′′′, where R, R′, R′′,


Thiocarbazones (Diazenecarbothioic
and R′′′ represent H, or any organic functional


hydrazides), Bis(thiocarbazones), and
group wherein the number of carbon atoms


Poly(thiocarbazones) (N—S Bidentates, N—S
ranges from 0 to 40, optionally having halogen


Tetradentates, and N—S Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #15:
R—N═N—R′ for azo compounds, R—N═N—NH—R′


Azo compounds including triazenes with
for triazenes, where R, and R′ represent H or


thiol or mercapto or thiocarbonyl
any organic functional group wherein the


substitution at the ortho- (for aryl) or alpha-
number of carbon atoms ranges from 0 to 40,


or beta- (for alkyl) positions, Bis[o—(HS—) or
optionally having halogen or polarizing or


alpha- or beta—(HS—)azo compounds], or
water-insolubilizing/solubilizing groups


Poly[o—(HS—) or alpha- or beta—(HS—)azo
attached. (Must include ortho-thio, mercapto, or


compounds) (N—S Bidentates, N—S
thiocarbonyl substituted aryl azo compounds,


Tridentates, N—S Tetradentates, or N—S
and alpha- or beta-thio, mercapto, or


Hexadentates)
thiocarbonyl alkyl azo compounds.) Ligand can



also contain nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #16:
R—N═N—C(═S)—NR′R′′ for


Diazeneformothioamides,
diazeneformothioamides, and R—N═N—CR′R′′—C(═S)—NR′′′R′′′′


Diazeneacetothioamides,
for diazeneacetothioamides,


Bis(diazeneformothioamides),
where R, R′, R′′, R′′′, and R′′′′ represent H,


Bis(diazeneacetothioamides),
NH2, or any organic functional group wherein


Poly(diazeneformothioamides), and
the number of carbon atoms ranges from 0 to


Poly(diazeneacetothioamides) (N—S
40, optionally having halogen or polarizing or


Bidentates, N—S Tetradentates, and N—S
water-insolubilizing/solubilizing groups


Hexadentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #17:
R—N═N—C(═S)—O—R′ or R—N═N—CR′R′′—C(═S)—O—R′′′


Diazenecarbothioic acids,
for diazenecarbothioic acids, and R—N═N—C(═S)—S—R′


Diazenecarbodithioic acids,
or R—N═N—CR′R′′—C(═S)—S—R′′′


Bis(diazenecarbothioic acids),
for diazenecarbodithoic acids, where R, R′,


Bis(diazenecarbodithioic acids),
R′′, and R′′′ represent H, NH2, or any organic


Poly(diazenecarbothioic acids),
functional group wherein the number of carbon


Poly(diazenecarbodithioic acids) and
atoms ranges from 0 to 40, optionally having


derivatives thereof (N—S Bidentates, N—S
halogen or polarizing or water-


Tetradentates, N—S Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #18:
R—N═N—C(═S)—R′ for


Diazeneformothioaldehydes,
diazeneformothioaldehydes, and R—N═N—CR′R′′—C(═S)—R′′′


Diazeneacetothioaldehydes,
for


Bis(diazeneformothioaldehydes),
diazeneacetothioaldehydes, where R, R′, R′′,


Bis(diazeneacetothioaldehydes),
and R′′′ represent H, NH2, or any organic


Poly(diazeneformothioaldehydes), and
functional group wherein the number of carbon


Poly(diazeneacetothioaldehydes) (N—S
atoms ranges from 0 to 40, optionally having


Bidentates, N—S Tetradentates and N—S
halogen or polarizing or water-


Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #19:
RR′—N—C(═S)—N═N—C(═S)—NR′′R′′′ or RR′—N—C(═S)—N═N—C(═O)—NR′′R′′′


Diazenediformothioamides,
for


Diazenediacetothioamides,
diazenediformothioamides, and


Bis(diazenediformothioamides),
or RR′—N—C(═S)—CR′′R′′′—N═N—CR′′′′R′′′′′—C(═S)—NR′′′′′′R′′′′′′′


Bis(diazenediacetothioamides),
RR′—N—C(═S)—CR′′R′′′—N═N—CR′′′′R′′′′′—C(═O)—NR′′′′′′R′′′′′′′


Poly(diazenediformothioamides), and
for diazenediacetothioamides,


Poly(diazenediacetothioamides) (N—S
where R, R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and


Tridentates and N—S Hexadentates)
R′′′′′′′ represent H, NH2, or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #20:
R—O—C(═S)—N═N—C(═S)—O—R′,


Diazenedicarbothioic acids,
R—O—C(═S)—CR′R′′—N═N—CR′′′R′′′′—C(═S)—O—R′′′′′,


Diazenedicarbodithioic acids,
R—O—C(═S)—N═N—C(═O)—O—R′,


Bis(diazenedicarbothioic acids),
or R—O—C(═S)—CR′R′′—N═N—CR′′′R′′′′—C(═O)—O—R′′′′′ for


Bis(diazenedicarbodithioic acids),
diazenedicarbothioic acids, and R—S—C(═S)—N═N—C(═S)—S—R′


Poly(diazenedicarbothioic acids),
or R—S—C(═S)—CR′R′′—N═N—CR′′′R′′′′—C(═S)—S—R′′′′′


Poly(diazenedicarbodithioic acids) and
for


derivatives thereof (N—S Tridentates and N—S
diazenedicarbodithoic acids, where R, R′, R′′,


Hexadentates)
R′′′, R′′′′, and R′′′′′ represent H, NH2, or any



organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #21:
RC(═S)—N═N—C(═S)—R′ or RC(═S)—N═N—C(═O)—R′


Diazenediformothioaldehydes,
for diazenediformothioaldehydes, and


Diazenediacetothioaldehydes,
RC(═S)—CR′R′′—N═N—CR′′′R′′′′—C(═S)—R′′′′′ or


Bis(diazenediformothioaldehydes),
RC(═S)—CR′R′′—N═N—CR′′′R′′′′—C(═O)—R′′′′′ for


Bis(diazenediacetothioaldehydes),
diazenediacetothioaldehydes, where R, R′, R′′,


Poly(diazenediformothioaldehydes), and
R′′′, R′′′′, and R′′′′′ represent H, NH2, or any


Poly(diazenediacetothioaldehydes) (N—S
organic functional group wherein the number of


Tridentates and N—S Hexadentates)
carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #22:
R—N═N—CR′═N—NR′′R′′′, where R, R′, R′′, and


Ortho-thio (or -mercapto) Substituted
R′′′ represent H, or any organic functional


Formazans, Bis(o-thio or -mercapto
group wherein the number of carbon atoms


substituted formazans), and Poly(o-thio or -
ranges from 0 to 40, optionally having halogen


mercapto substituted formazans) (N—S
or polarizing or water-


Bidentates, N—S Tridentates, N—S
insolubilizing/solubilizing groups attached.


Tetradentates, and N—S Hexadentates)
(Must include ortho-thio or mercapto



substituted aryl R derivatives, and beta-thio or



mercapto substituted alkyl R derivatives.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #23:
RR′C═N—N═CR′′R′′′ or RR′C═N—NR′′R′′′ (for


Ortho-thio (or -mercapto) Substituted
ketazines), where R, R′, R′′, and R′′′ represent


Azines (including ketazines), Bis(o-thio or
H, or any organic functional group wherein the


mercapto substituted azines), and Poly(o-
number of carbon atoms ranges from 0 to 40,


thio or mercapto substituted azines) (N—S
optionally having halogen or polarizing or


Bidentates, N—S Tridentates, N—S
water-insolubilizing/solubilizing groups


Tetradentates, and N—S Hexadentates)
attached. (Must include ortho-thio or mercapto



substituted aryl R derivatives, and beta-thio or



mercapto substituted alkyl R derivatives.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #24:
RR′C═N—R′′, where R, R′, and R′′ represent H,


Schiff Bases with one Imine (C═N) Group
or any organic functional group wherein the


and with ortho- or alpha- or beta-thio or
number of carbon atoms ranges from 0 to 40,


mercapto or thiocarbonyl substitution (N—S
optionally having halogen or polarizing or


Bidentates, N—S Tridentates, N—S
water-insolubilizing/solubilizing groups


Tetradentates, N—S Pentadentates, or N—S
attached. (Must contain ortho- or alpha- or beta-


Hexadentates). Also includes Schiff Bases
thio or mercapto or thiocarbonyl substitution.)


derived from the reaction of carbonyl
Ligand can also contain nonbinding N, O, S, or


compounds with dithiocarbazates, and
P atoms.


hydrazones with ortho-S substitution.


N—S Valence Stabilizer #25:
RR′C═N—R′′—N═CR′′′R′′′′ or R—N═C—R′—C═N—R′


Schiff Bases with two Imine (C═N) Groups
or RC═N—R′—N═CR′′, where R, R′, R′′, R′′′,


and with ortho- or alpha- or beta-thio or
and R′′′′ represent H, or any organic functional


mercapto or thiocarbonyl substitution (N—S
group wherein the number of carbon atoms


Tridentates, N—S Tetradentates, N—S
ranges from 0 to 40, optionally having halogen


Pentadentates, or N—S Hexadentates). Also
or polarizing or water-


includes Schiff Bases derived from the
insolubilizing/solubilizing groups attached.


reaction of carbonyl compounds with
(Must contain ortho- or alpha- or beta-thio or


dithiocarbazates, and hydrazones with
mercapto or thiocarbonyl substitution.) Ligand


ortho-S substitution.
can also contain nonbinding N, O, S, or P



atoms.


N—S Valence Stabilizer #26:
N(—R—N═CR′R′′)3, where R, R′, and R′′


Schiff Bases with three Imine (C═N)
represent H, or any organic functional group


Groups and with ortho- or alpha- or beta-
wherein the number of carbon atoms ranges


thio or mercapto or thiocarbonyl
from 0 to 40, optionally having halogen or


substitution (N—S Tetradentates, N—S
polarizing or water-insolubilizing/solubilizing


Pentadentates, or N—S Hexadentates). Also
groups attached. (Must contain ortho- or alpha-


includes Schiff Bases derived from the
or beta-thio or mercapto or thiocarbonyl


reaction of carbonyl compounds with
substitution.) Ligand can also contain


dithiocarbazates, and hydrazones with
nonbinding N, O, S, or P atoms.


ortho-S substitution.


N—S Valence Stabilizer #27:
[R—CR′(—NR′′R′′′)]x—R′′′′—[C(—SR′′′′′)R′′′′′′R′′′′′′′]y,


Thioalkyl Amines (Aminothiols or
[R—CR′(—NR′′R′′′)]x—R′′′′—[C(—S—S—R′′′′′)R′′′′′′R′′′′′′′]y,


Aminodisulfides) and Thioalkyl Imines
or [R—CR′(—NR′′R′′′)]x—R′′′′—[C(═S)R′′′′′]y


(Iminothiols or Iminodisulfides) (N—S
for thioalkyl


Bidentates, N—S Tridentates, N—S
amines; and [R—C(═NR′)]x —R′′—[C(—SR′′′)R′′′′R′′′′′]y,


Tetradentates, and N—S Hexadentates)
[R—C(═NR′)]x—R′′—[C(—S—SR′′′)R′′′′R′′′′′]y,



or [R—C(═NR′)]x—R′′—[C(═S)R′′′]y



for thioalkyl imines, where R, R′,



R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent



H, NH2, or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached, and x and y = 1–6. Ligand can



also contain nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #28:
[R(—NR′R′′)(—SR′′′)], [R(—NR′R′′)(—S—S—R′′′)],


Thioaryl Amines and Thioaryl Imines (N—S
[R(—NR′R′′)(—C(═S)R′′′], [R(—NR′R′′)x]2S, [R(—NR′R′′)x]2–3R′′′(—SR′′′′)y,


Bidentates, N—S Tridentates, N—S
[R(—SR′)x]2–3R′′(—NR′′′R′′′′)y,


Tetradentates, and N—S Hexadentates)
[R(—NR′R′′)x]2S2, and [R(—NR′R′′)x]2R′′′(C(═S))yR′′′′



for thioaryl amines;



and [R(—SR′)x]2NH or [R(—SR′)x]2NHNH for



thioaryl imines, where R, R′, R′′, and R′′′, R′′′′



represent H, NH2, or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached, and



x = 0–2 and y = 1–4. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #29:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional sulfur-


Nitrogen Atoms at least one additional
containing substituents (usually thiols,


Sulfur Atom Binding Site not in a Ring (N—S
mercaptans, disulfides, or thiocarbonyls) that


Bidentates, N—S Tridentates, N—S
constitute S binding sites. Can include other


Tetradentates, or N—S Hexadentates)
ring systems bound to the heterocyclic ring or to



the S-containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #30:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional sulfur-


Nitrogen Atoms at least one additional
containing substituents (usually thiols,


Sulfur Atom Binding Site not in a Ring (N—S
mercaptans, disulfides, or thiocarbonyls) that


Bidentates, N—S Tridentates, N—S
constitute S binding sites. Can include other


Tetradentates, or N—S Hexadentates)
ring systems bound to the heterocyclic ring or to



the S-containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #31:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional nitrogen-containing


least one additional Nitrogen Atom Binding
substituents (usually amines, imines, or


Site not in a Ring (N—S Bidentates, N—S
hydrazides) that constitute N binding sites. Can


Tridentates, N—S Tetradentates, or N—S
include other ring systems bound to the


Hexadentates)
heterocyclic ring or to the N-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This 5-membered



ring(s) and/or attached, uncoordinating rings



and/or N-containing substituent(s) may or may



not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #32:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional nitrogen-containing


least one additional Nitrogen Atom Binding
substituents (usually amines, imines, or


Site not in a Ring (N—S Bidentates, N—S
hydrazides) that constitute N binding sites. Can


Tridentates, N—S Tetradentates, or N—S
include other ring systems bound to the


Hexadentates)
heterocyclic ring or to the N-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This 6-membered



ring(s) and/or attached, uncoordinating rings



and/or N-containing substituent(s) may or may



not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #33:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional sulfur-


Nitrogen Atoms at least one additional
containing rings that constitute S binding sites.


Sulfur Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N—S Bidentates, N—S Tridentates, N—S
or S-containing heterocyclic rings, but they do


Tetradentates)
not coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



additional S-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #34:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional sulfur-


Nitrogen Atoms at least one additional
containing rings that constitute S binding sites.


Sulfur Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N—S Bidentates, N—S Tridentates, N—S
or S-containing heterocyclic rings, but they do


Tetradentates)
not coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



additional S-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #35:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Six-, Eight-, and Ten-
six, eight, or ten binding sites composed of


Membered Macrocyclics, Macrobicyclics,
nitrogen and sulfur to valence stabilize the


and Macropolycyclics (including
central metal ion. Can include other


Catapinands, Cryptands, Cyclidenes, and
hydrocarbon or ring systems bound to this


Sepulchrates) wherein all Binding Sites are
macrocyclic ligand, but they do not coordinate


composed of Nitrogen (usually amine or
with the stabilized, high valence metal ion. This


imine groups) or Sulfur (usually thiols,
ligand and/or attached, uncoordinating


mercaptans, or thiocarbonyls) and are not
hydrocarbons/rings may or may not have


contained in Component Heterocyclic
halogen or polarizing or water-


Rings (N—S Bidentates, N—S Tridentates, N—S
insolubilizing/solubilizing groups attached.


Tetradentates, and N—S Hexadentates)


N—S Valence Stabilizer #36:
Macrocyclic ligands containing a total of four,


Four-, Six-, Eight-, or Ten-Membered
six, eight, or ten heterocyclic rings containing


Macrocyclics, Macrobicyclics, and
nitrogen or sulfur binding sites. Can include


Macropolycyclics (including Catapinands,
other hydrocarbon/ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Nitrogen or Sulfur and are contained in
ligand and/or attached, uncoordinating


Component Heterocyclic Rings (N—S
hydrocarbon/rings may or may not have halogen


Bidentates, N—S Tridentates, N—S
or polarizing or water-insolubilizing groups


Tetradentates, or N—S Hexadentates)
attached.


N—S Valence Stabilizer #37:
Macrocyclic ligands containing at least one


Four-, Six-, Eight-, or Ten-Membered
heterocyclic ring. These heterocyclic rings


Macrocyclics, Macrobicyclics, and
provide nitrogen or sulfur binding sites to


Macropolycyclics (including Catapinands,
valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine, imine, thiol, mercapto, or thiocarbonyl


wherein all Binding Sites are composed of
binding sites can also be included in the


Nitrogen or Sulfur and are contained in a
macrocyclic ligand, so long as the total number


Combination of Heterocyclic Rings and
of binding sites is four, six, eight, or ten. Can


Amine, Imine, Thiol, Mercapto, or
include other hydrocarbon/ring systems bound


Thiocarbonyl Groups (N—S Bidentates, N—S
to this macrocyclic ligand, but they do not


Tridentates, N—S Tetradentates, or N—S
coordinate with the stabilized, high valence


Hexadentates)
metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


N—O Valence Stabilizer #1:
R′—N(—OH)—C(—R)═2N—R′′, where R, R′, and R′′


N-Hydroxy(or N,N′-dihydroxy)amidines
represent H or any organic functional group


and N-Hydroxy(or N,N′-
wherein the number of carbon atoms ranges


dihydroxy)diamidines (N—O Bidentates, N—O
from 0 to 40, optionally having halogen or


Tridentates, or N—O Tetradentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #2:
RR′—N—C(═NH)—NR′′—CO—NR′′′R′′′′ for


Guanylureas, Guanidinoureas,
guanylureas, and RR′—N—C(═NH)—NR′′—NH—CO—NR′′′R′′′′


Bis(guanylureas), Bis(guanidinoureas),
for guanidinoureas, where R, R′, R′′,


Poly(guanylureas), and
R′′′, and R′′′′ represent H, NH2, or any organic


Poly(guanidinoureas) (N—O Bidentates and
functional group wherein the number of carbon


N—O Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #3:
RR′—N—C(═NH)—NR′′—CO—R′′′ for N-


Amidinoamides, Guanidinoamides,
amidinoamides, or RR′—N—C(═NH)—CR′′R′′′—CO—N—R′′′′R′′′′′


Bis(amidinoamides), Bis(guanidinoamides),
for 2-amidinoacetamides, and


Poly(amidinoamides), and
RR′—N—C(═NH)—NR′′—NH—CO—R′′′ for


Poly(guanidinoamides) (including both N-
guanidinoamides, where R, R′, R′′, R′′′, R′′′′,


amidinoamides and 2-amidinoacetamides)
and R′′′′′ represent H, NH2, or any organic


(N—O Bidentates and N—O Tetradentates)
functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #4:
R—C(═NH)—NR′—CO—R′′, where R, R′, and R′′,


Imidoylamides, Bis(imidoylamides), and
represent H or any organic functional group


Poly(imidoylamides) (N—O Bidentates and
wherein the number of carbon atoms ranges


N—O Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #5:
RR′—N—C(═NH)—O—CO—NR′′R′′′, where R, R′,


O-Amidinocarbamates, Bis(O-
R′′, and R′′′ represent H, NH2, or any organic


amidinocarbamates), and Poly(O-
functional group wherein the number of carbon


amidinocarbamates) (N—O Bidentates and
atoms ranges from 0 to 40, optionally having


N—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #6:
RR′—N—C(═NH)—S—CO—NR′′R′′′, where R, R′,


S-Amidinothiocarbamates, Bis(S-
R′′, and R′′′ represent H, NH2, or any organic


amidinothiocarbamates), and Poly(S-
functional group wherein the number of carbon


amidinothiocarbamates) (N—O Bidentates
atoms ranges from 0 to 40, optionally having


and N—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #7:
(NH═)(NH═)P(OR)(OR′), where R, R′, and R′′


Diimidosulfuric Acid, Bis(diimidosulfuric
represent H, NH2, or any organic functional


acid), and derivatives thereof (N—O
group wherein the number of carbon atoms


Bidentates and N—O Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #8:
(NH═)P(—OR)(—OR′)(—OR′′), where R, R′, and


Phosphorimidic Acid, Bis(phosphorimidic
R′′ represent H, NH2, or any organic functional


acid); and Poly(phosphorimidic acid), and
group wherein the number of carbon atoms


derivatives thereof (N—O Bidentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #9:
(O═)P(—NRR′)(—NR′′R′′′)(—NR′′′′R′′′′′), where R,


Phosphoric Triamides, Bis(phosphoric
R′, R′′, R′′′, R′′′′, and R′′′′′ represent H, NH2, or


triamides), and Poly(phosphoric triamides)
any organic functional group wherein the


(N—O Bidentates and N—O Tetradentates)
number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #10:
(O═)P(—NRR′)(—OR′′)(—OR′′′) for


Phosphoramidic Acid, Phosphorodiamidic
phosphoramidic acid and (O═)P(—NRR′)(—NR′′R′′′)(—OR′′′′)


Acid, Bis(phosphoramidic acid),
for phosphorodiamidic acid,


Bis(phosphorodiamidic acid),
where R, R′, R′′, R′′′, and R′′′′ represent H,


Poly(phosphoramidic acid),
NH2, or any organic functional group wherein


Poly(phosphorodiamidic acid), and
the number of carbon atoms ranges from 0 to


derivatives thereof (N—O Bidentates and N—O
40, optionally having halogen or polarizing or


Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #11:
R′—C(═O)—N═C(—R)(—NHR′′), where R is an


N-Acyl 7-Aminobenzylidenimines (N—O
aromatic derivative (i.e. —C6H5), and R′ and R′′


Bidentates or N—O Tetradentates)
represent H, NH2, or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #12:
R—C(═NOH)—R′ for oximes, and R—C(═NOH)—C(═NOH)—R′


Oximes, Dioximes, and Poly(oximes) (N—O
for dioximes, where R and R′


Bidentates, N—O Tridentates, and N—O
represent H, NH2, or any organic functional


Tetradentates)
group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #13:
R—C(═O)—C(═NOH)—R′, where R and R′


Carbonyl oximes, Bis(carbonyl oximes),
represent H, NH2, or any organic functional


and Poly(carbonyl oximes) (N—O
group wherein the number of carbon atoms


Bidentates, N—O Tridentates, and N—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #14:
R—C(═N—R′′)—C(═NOH)—R′, where R, R′, and


Imine oximes, Bis(imine oximes), and
R′′ represent H, NH2, or any organic functional


Poly(imine oximes) (including 2-nitrogen
group wherein the number of carbon atoms


heterocyclic oximes) (N—O Bidentates, N—O
ranges from 0 to 40, optionally having halogen


Tridentates, N—O Tetradentates, and N—O
or polarizing or water-


Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #15:
R—CH(—OH)—C(═NOH)—R′, where R, R′, and R′′


Hydroxy oximes, Bis(hydroxy oximes), and
represent H, NH2, or any organic functional


Poly(hydroxy oximes) (including 2-oxygen
group wherein the number of carbon atoms


heterocyclic oximes) (N—O Bidentates, N—O
ranges from 0 to 40, optionally having halogen


Tridentates, N—O Tetradentates, and N—O
or polarizing or water-


Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #16:
RR′—C(—NH—R′′)—C(═NOH)—R′′′, where R, R′,


Amino oximes, Bis(amino oximes), and
R′′, and R′′′ represent H, NH2, or any organic


Poly(amino oximes) (N—O Bidentates, N—O
functional group wherein the number of carbon


Tridentates, N—O Tetradentates, and N—O
atoms ranges from 0 to 40, optionally having


Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #17:
RR′—N—C(═NOH)—R′′, where R, R′, and R′′


Amido oximes, Bis(amido oximes), and
represent H, NH2, or any organic functional


Poly(amido oximes) (N—O Bidentates, N—O
group wherein the number of carbon atoms


Tridentates, N—O Tetradentates, and N—O
ranges from 0 to 40, optionally having halogen


Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #18:
R—N═N—C(═NOH)—R′ or RR′C═N—NR′′—C(═NOH)—R′′′,


Azo oximes, Bis(azo oximes), and Poly(azo
where R, R′, R′′, and R′′′


oximes) (N—O Bidentates, N—O Tridentates,
represent H, NH2, or any organic functional


N—O Tetradentates, and N—O Hexadentates).
group wherein the number of carbon atoms


Also includes hydrazone oximes.
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached. (R



is typically an aryl group.) Ligand can also



contain nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #19:
o-(ON—)(HO—)Ar, where Ar represents an


2-Nitrosophenols (o-Quinone monoximes)
aromatic group or heterocyclic wherein the


(N—O Bidentates)
number of carbon atoms ranges from 6 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #20:
o-(O2N—)(HO—)Ar, where Ar represents an


2-Nitrophenols (N—O Bidentates)
aromatic group or heterocyclic wherein the



number of carbon atoms ranges from 6 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #21:
R—C(═O)—NR′—OH or R—C(—OH)═N—OH, where


Hydroxamates (Hydroxylamines),
R and R′ represent H, NH2, or any organic


Bis(hydroxamates), and
functional group wherein the number of carbon


Poly(hydroxamates) (N—O Bidentates, N—O
atoms ranges from 0 to 40, optionally having


Tetradentates, and N—O Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #22:
R—N(—NO)—OH, where R represents any organic


N-Nitrosohydroxylamines, Bis(N-
functional group wherein the number of carbon


nitrosohydroxylamines), and Poly(N-
atoms ranges from 1 to 40, optionally having


nitrosohydroxylamines) (N—O Bidentates,
halogen or polarizing or water-


N—O Tetradentates, and N—O Hexadentates)
insolubilizing/solubilizing groups attached. (R



is typically an aryl or heterocyclic group.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #23:
R—CH(—NHR′)—C(═O)(—OH) for amino acids and


Amino Acids and ortho-Aminocarboxylic
ortho-aminocarboxylic acids, and


Acids, Peptides, Polypeptides, and Proteins
R—CH(—NHR′)—C(═O)—(NR′′—)CH(—R′′′)—C(═O)(—OH)


[N—O Bidentates, N—O Tridentates, and N—O
for peptides, where R, R′, R′′, and R′′′ represent


Tetradentates; possibly S—O dentates for
any organic functional group wherein the


sulfur-contg. examples such as
number of carbon atoms ranges from 1 to 40,


penicillamine and cystine]
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #24:
RCONR′R′′, where R, R′, and R′′ represent H,


Amides, Bis(amides), and Poly(amides),
NH2, or any organic functional group wherein


including lactams (N—O Bidentates, N—O
the number of carbon atoms ranges from 0 to


Tridentates, and N—O Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #25:
RR′—N—C(═O)—NR′′—N═CR′′′R′′′′, where R, R′,


Semicarbazones, Bis(semicarbazones), and
R′′, R′′′, and R′′′′ represent H, or any organic


Poly(semicarbazones) (N—O Bidentates, N—O
functional group wherein the number of carbon


Tetradentates, and N—O Hexadentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #26:
R—C(═O)—NR′—N═CR′′R′′′, where R, R′, R′′, and


Acyl hydrazones, Bis(acyl hydrazones), and
R′′′ represent H, or any organic functional


Poly(acyl hydrazones) (N—O Bidentates, N—O
group wherein the number of carbon atoms


Tetradentates, and N—O Hexadentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #27:
R—N═N—C(═O)—NR′—N—R′′R′′′, where R, R′, R′′,


Carbazones (Diazenecarboxylic
and R′′′ represent H, or any organic functional


hydrazides), Bis(carbazones), and
group wherein the number of carbon atoms


Poly(carbazones) (N—O Bidentates, N—O
ranges from 0 to 40, optionally having halogen


Tetradentates, and N—O Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #28:
R—N═N—R′ for azo compounds, R—N═N—NH—R′


Azo compounds including triazenes with
for triazenes, where R, and R′ represent H or


hydroxyl or carboxy or carbonyl
any organic functional group wherein the


substitution at the ortho- (for aryl) or alpha-
number of carbon atoms ranges from 0 to 40,


or beta- (for alkyl) positions, Bis[o-(HO—)
optionally having halogen or polarizing or


or alpha- or beta-(HO—)azo compounds], or
water-insolubilizing/solubilizing groups


Poly[o-(HO—) or alpha- or beta-(HO—)azo
attached. (Must include ortho-hydroxy or


compounds) (N—O Bidentates, N—O
carboxy or carbonyl substituted aryl azo


Tridentates, N—O Tetradentates, or N—O
compounds, and alpha- or beta-hydroxy or


Hexadentates)
carboxy or carbonyl alkyl azo compounds.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #29:
R—N═N—C(═O)—NR′R′′ for diazeneformamides,


Diazeneformamides, Diazeneacetamides,
and R—N═N—CR′R′′—C(═O)—NR′′′R′′′′ for


Bis(diazeneformamides),
diazeneacetamides, where R, R′, R′′, R′′′, and


Bis(diazeneacetamides),
R′′′′ represent H, NH2, or any organic functional


Poly(diazeneformamides), and
group wherein the number of carbon atoms


Poly(diazeneacetamides) (N—O Bidentates,
ranges from 0 to 40, optionally having halogen


N—O Tetradentates, and N—O Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #30:
R—N═N—C(═O)—O—R′ for diazeneformic acid,


Diazeneformic acids, Diazeneacetic acids,
and R—N═N—CR′R′′—C(═O)—O—R′′′ for


Bis(diazeneformic acids), Bis(diazeneacetic
diazeneacetic acid, where R, R′, R′′, and R′′′


acids), Poly(diazeneformic acids),
represent H, NH2, or any organic functional


Poly(diazeneacetic acids), and derivatives
group wherein the number of carbon atoms


thereof (N—O Bidentates, N—O
ranges from 0 to 40, optionally having halogen


Tetradentates, N—O Hexadentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #31:
R—N═N—C(═O)—R′ for diazeneformaldehydes,


Diazeneformaldehydes,
and R—N═N—CR′R′′—C(═O)—R′′′ for


Diazeneacetaldehydes,
diazeneacetaldehydes, where R, R′, R′′, and R′′′


Bis(diazeneformaldehydes),
represent H, NH2, or any organic functional


Bis(diazeneacetaldehydes),
group wherein the number of carbon atoms


Poly(diazeneformaldehydes), and
ranges from 0 to 40, optionally having halogen


Poly(diazeneacetaldehydes) (N—O
or polarizing or water-


Bidentates, N—O Tetradentates and N—O
insolubilizing/solubilizing groups attached.


Hexadentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #32:
RR′—N—C(═O)—N═N—C(═O)—NR′′R′′′ for


Diazenediformamides,
diazenediformamides, and RR′—N—C(═O)—CR′′R′′′—N═N—CR′′′′R′′′′′—C(═O)—NR′′′′′′R′′′′′′′


Diazenediacetamides,
for diazenediacetamides, where R, R′, R′′, R′′′,


Bis(diazenediformamides),
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2,


Bis(diazenediacetamides),
or any organic functional group wherein the


Poly(diazenediformamides), and
number of carbon atoms ranges from 0 to 40,


Poly(diazenediacetamides) (N—O
optionally having halogen or polarizing or


Tridentates and N—O Hexadentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #33:
R—O—C(═O)—N═N—C(═O)—O—R′ for


Diazenediformic acids, Diazenediacetic
diazenediformic acid, and R—O—C(═O)—CR′R′′—N═N—CR′′′R′′′′—C(═O)—O—R′′′′′


acids, Bis(diazenediformic acids),
for


Bis(diazenediacetic acids),
diazenediacetic acid, where R, R′, R′′, R′′′, R′′′′,


Poly(diazenediformic acids),
and R′′′′′ represent H, NH2, or any organic


Poly(diazenediacetic acids) and derivatives
functional group wherein the number of carbon


thereof (N—O Tridentates and N—O
atoms ranges from 0 to 40, optionally having


Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #34:
RC(═O)—N═N—C(═O)—R′ for


Diazenediformaldehydes,
diazenediformaldehydes, and RC(═O)—CR′R′′—N═N—CR′′′R′′′′—C(═O)—R′′′′′


Diazenediacetaldehydes,
for


Bis(diazenediformaldehydes),
diazenediacetaldehydes, where R, R′, R′′, R′′′,


Bis(diazenediacetaldehydes),
R′′′′, and R′′′′′ represent H, NH2, or any organic


Poly(diazenediformaldehydes), and
functional group wherein the number of carbon


Poly(diazenediacetaldehydes) (N—O
atoms ranges from 0 to 40, optionally having


Tridentates and N—O Hexadentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #35:
R—N═N—CR′—N—NR′′R′′′, where R, R′, R′′, and


Ortho-hydroxy (or -carboxy) Substituted
R′′′ represent H, or any organic functional


Formazans, Bis(o-hydroxy or -carboxy
group wherein the number of carbon atoms


substituted formazans), and Poly(o-hydroxy
ranges from 0 to 40, optionally having halogen


or -carboxy substituted formazans) (N—O
or polarizing or water-


Bidentates, N—O Tridentates, N—O
insolubilizing/solubilizing groups attached.


Tetradentates, and N—O Hexadentates)
(Must include ortho-hydroxy or carboxy



substituted aryl R derivatives, and beta-hydroxy



or carboxy substituted alkyl R derivatives.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #36:
RR′C═N—N═CR′′R′′′ or RR′C═N—NR′′R′′′ (for


Ortho-hydroxy (or -carboxy) Substituted
ketazines), where R, R′, R′′, and R′′′ represent


Azines (including ketazines), Bis(o-
H, or any organic functional group wherein the


hydroxy or carboxy substituted azines), and
number of carbon atoms ranges from 0 to 40,


Poly(o-hydroxy or carboxy substituted
optionally having halogen or polarizing or


azines) (N—O Bidentates, N—O Tridentates,
water-insolubilizing/solubilizing groups


N—O Tetradentates, and N—O Hexadentates)
attached. (Must include ortho-hydroxy or



carboxy substituted aryl R derivatives, and beta-



hydroxy or carboxy substituted alkyl R



derivatives.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #37:
RR′C═N—R”, where R, R′, and R′′ represent H,


Schiff Bases with one Imine (C═N) Group
or any organic functional group wherein the


and with ortho- or alpha- or beta-hydroxy
number of carbon atoms ranges from 0 to 40,


or carboxy or carbonyl substitution (N—O
optionally having halogen or polarizing or


Bidentates, N—O Tridentates, N—O
water-insolubilizing/solubilizing groups


Tetradentates, N—O Pentadentates, or N—O
attached. (Must contain ortho- or alpha- or beta-


Hexadentates). Also includes hydrazones
hydroxy or carboxy or carbonyl substitution.)


with ortho-O substitution.
Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #38:
RR′C═N—R′′—N═CR′′′R′′′′ or R—N═C—R′—C═N—R′


Schiff Bases with two Imine (C═N) Groups
or RC═N—R′—N═CR′′, where R, R′, R′′, R′′′,


and with ortho- or alpha- or beta-hydroxy
and R′′′′ represent H, or any organic functional


or carboxy or carbonyl substitution (N—O
group wherein the number of carbon atoms


Tridentates, N—O Tetradentates, N—O
ranges from 0 to 40, optionally having halogen


Pentadentates, or N—O Hexadentates). Also
or polarizing or water-


includes hydrazones with ortho-O
insolubilizing/solubilizing groups attached.


substitution.
(Must contain ortho- or alpha- or beta-hydroxy



or carboxy or carbonyl substitution.) Ligand



can also contain nonbinding N, O, S, or P



atoms.


N—O Valence Stabilizer #39:
N(—R—N═CR′R′′)3, where R, R′, and R′′


Schiff Bases with three Imine (C═N)
represent H, or any organic functional group


Groups and with ortho- or alpha- or beta-
wherein the number of carbon atoms ranges


hydroxy or carboxy or carbonyl substitution
from 0 to 40, optionally having halogen or


(N—O Tetradentates, N—O Pentadentates, or
polarizing or water-insolubilizing/solubilizing


N—O Hexadentates). Also includes
groups attached. (Must contain ortho- or alpha-


hydrazones with ortho-O substitution.
or beta-hydroxy or carboxy or carbonyl



substitution.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #40:
[R—C(NR′R′′)]x—R′′—[Si(—OR′′′)zR′′′′3−z]y where


Silylaminoalcohols (N—O Bidentates, N—O
R, R′, R′′, R′′′, and R′′′′ represent H, NH2, or


Tridentates, N—O Tetradentates, and N—O
any organic functional group wherein the


Hexadentates)
number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached, and x and y = 1–6, z = 1–3. Ligand can



also contain nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #41:
[R—C(═NR′)]x—R′′—[C(—OR′′′)R′′′′R′′′′′]y or [R—C(═NR′)]x—R′′—[C(═O)R′′′]y,


Hydroxyalkyl Imines (Imino Alcohols) (N—O
where R, R′, R′′,


Bidentates, N—O Tridentates, N—O
R′′′, R′′′′, and R′′′′′ represent H, NH2, or any


Tetradentates, and N—O Hexadentates)
organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached, and



x and y = 1–6. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #42:
[R(—NR′R′′)(—OR′′′)], [R(—NR′R′′)(—C(═O)R′′′],


Hydroxyaryl Amines and Hydroxyaryl
[R(—NR′R′′)x]2O, [R(—NR′R′′)x]2–3R′′′(—OR′′′′)y,


Imines (N—O Bidentates, N—O Tridentates,
[R(—OR′)x]2–3R′′(—NR′′′R′′′′)y, and [R(—NR′R′′)x]2R′′′(C(═O))yR′′′′


N—O Tetradentates, and N—O Hexadentates)
for hydroxyaryl



amines; and [R(—OR′)x]2NH or [R(—OR′)x]2NHNH



for hydroxyaryl imines, where



R, R′, R′′, R′′′, and R′′′′ represent H, NH2, or



any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached, and x = 0–2 and y = 1–4. Ligand can



also contain nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #43:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional oxygen-


Nitrogen Atoms at least one additional
containing substituents (usually hydroxy,


Oxygen Atom Binding Site not in a Ring
carboxy or carbonyl groups) that constitute O


(N—O Bidentates, N—O Tridentates, N—O
binding sites. Can include other ring systems


Tetradentates, or N—O Hexadentates)
bound to the heterocyclic ring or to the O-



containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #44:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional oxygen-


Nitrogen Atoms at least one additional
containing substituents (usually hydroxy,


Oxygen Atom Binding Site not in a Ring
carboxy, or carbonyl groups) that constitute O


(N—O Bidentates, N—O Tridentates, N—O
binding sites. Can include other ring systems


Tetradentates, or N—O Hexadentates)
bound to the heterocyclic ring or to the O-



containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #45:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms at
contains additional nitrogen-containing


least one additional Nitrogen Atom Binding
substituents (usually amines, imines, or


Site not in a Ring (N—O Bidentates, N—O
hydrazides) that constitute N binding sites. Can


Tridentates, N—O Tetradentates, or N—O
include other ring systems bound to the


Hexadentates)
heterocyclic ring or to the N-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This 5-membered



ring(s) and/or attached, uncoordinating rings



and/or N-containing substituent(s) may or may



not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #46:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms at
contains additional nitrogen-containing


least one additional Nitrogen Atom Binding
substituents (usually amines, imines, or


Site not in a Ring (N—O Bidentates, N—O
hydrazides) that constitute N binding sites. Can


Tridentates, N—O Tetradentates, or N—O
include other ring systems bound to the


Hexadentates)
heterocyclic ring or to the N-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This 6-membered



ring(s) and/or attached, uncoordinating rings



and/or N-containing substituent(s) may or may



not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #47:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional oxygen-


Nitrogen Atoms at least one additional
containing rings that constitute O binding sites.


Oxygen Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N—O Bidentates, N—O Tridentates, N—O
or O-containing heterocyclic rings, but they do


Tetradentates)
not coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 5-membered ring(s) and/or



additional O-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #48:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, three, or four nitrogen atoms. In


containing One, Two, Three, or Four
addition, ligand contains additional oxygen-


Nitrogen Atoms at least one additional
containing rings that constitute O binding sites.


Oxygen Atom Binding Site in a Separate
Can include other ring systems bound to the N-


Ring (N—O Bidentates, N—O Tridentates, N—O
or O-containing heterocyclic rings, but they do


Tetradentates)
not coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This 6-membered ring(s) and/or



additional O-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—O Valence Stabilizer #49:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Six-, Eight-, and Ten-
six, eight, or ten binding sites composed of


Membered Macrocyclics, Macrobicyclics,
nitrogen and oxygen to valence stabilize the


and Macropolycyclics (including
central metal ion. Can include other


Catapinands, Cryptands, Cyclidenes, and
hydrocarbon or ring systems bound to this


Sepulchrates) wherein all Binding Sites are
macrocyclic ligand, but they do not coordinate


composed of Nitrogen (usually amine or
with the stabilized, high valence metal ion. This


imine groups) or Oxygen (usually hydroxy,
ligand and/or attached, uncoordinating


carboxy, or carbonyl groupss) and are not
hydrocarbons/rings may or may not have


contained in Component Heterocyclic
halogen or polarizing or water-


Rings (N—O Bidentates, N—O Tridentates,
insolubilizing/solubilizing groups attached.


N—O Tetradentates, and N—O Hexadentates)


N—O Valence Stabilizer #50:
Macrocyclic ligands containing a total of four,


Four-, Six-, Eight-, or Ten-Membered
six, eight, or ten heterocyclic rings containing


Macrocyclics, Macrobicyclics, and
nitrogen or oxygen binding sites. Can include


Macropolycyclics (including Catapinands,
other hydrocarbon/ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Nitrogen or Oxygen and are contained in
ligand and/or attached, uncoordinating


Component Heterocyclic Rings (N—O
hydrocarbon/rings may or may not have halogen


Bidentates, N—O Tridentates, N—O
or polarizing or water-insolubilizing groups


Tetradentates, or N—O Hexadentates)
attached.


N—O Valence Stabilizer #51:
Macrocyclic ligands containing at least one


Four-, Six-, Eight-, or Ten-Membered
heterocyclic ring. These heterocyclic rings


Macrocyclics, Macrobicyclics, and
provide nitrogen or oxygen binding sites to


Macropolycyclics (including Catapinands,
valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine, imine, hydroxy, carboxy, or carbonyl


wherein all Binding Sites are composed of
binding sites can also be included in the


Nitrogen or Oxygen and are contained in a
macrocyclic ligand, so long as the total number


Combination of Heterocyclic Rings and
of binding sites is four, six, eight, or ten. Can


Amine, Imine, Hydroxy, Carboxy, or
include other hydrocarbon/ring systems bound


Carbonyl Groups (N—O Bidentates, N—O
to this macrocyclic ligand, but they do not


Tridentates, N—O Tetradentates, or N—O
coordinate with the stabilized, high valence


Hexadentates)
metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


S—O Valence Stabilizer #1:
R—C(═S)—CR′R′′—C(═O)—R′′′ where R, R′, R′′,


1,3-Monothioketones (Monothio-beta-
and R′′′ represent H, NH2, or any organic


ketonates), 1,3,5-Monothioketones, 1,3,5-
functional group wherein the number of carbon


Dithioketones, Bis(1,3-Monothioketones),
atoms ranges from 0 to 40, optionally having


and Poly(1,3-Monothioketones) (S—O
halogen or polarizing or water-


Bidentates, S—O Tridentates, S—O
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #2:
RR′—N—C(═S)—CR′′R′′′—C(═O)—N—R′′′′R′′′′′


Thiomalonamides (Thiomalonodiamides),
where R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent H,


Bis(thiomalonamides), and
NH2, or any organic functional group wherein


Polythiomalonamides (S—O Bidentates, S—O
the number of carbon atoms ranges from 0 to


Tridentates, S—O Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #3:
RR′—N—C(═O)—CR′′R′′′—C(═S)—R′′′′ for 2-


2-Thioacylacetamides, 2-
thioacylacetamides, and RR′—N—C(═S)—CR′′R′′′—C(═O)—R′′′′


Acylthioacetamides, Bis(2-
for 2-acylthioacetamides, where R,


thioacylacetamides),
R′, R′′, R′′′, and R′′′′ represent H, NH2, or any


Bis(2acylthioacetamides), Poly(2-
organic functional group wherein the number of


thioacylacetamides), and Poly(2-
carbon atoms ranges from 0 to 40, optionally


Acylthioacetamides) (S—O Bidentates, S—O
having halogen or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #4:
RR′—N—C(═S)—S—C(═O)—N—R′′R′′′ where R, R′,


Dithiodicarbonic Diamides,
R′′, and R′′′ represent H, NH2 or any organic


Bis(dithiodicarbonic diamides), and
functional group wherein the number of carbon


Poly(dithiodicarbonic diamides) (S—O
atoms ranges from 0 to 40, optionally having


Bidentates, S—O Tridentates, S—O
halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #5:
(R—O—)(R′—O—)P(═S)—P(═O)(—O—R′′)(—O—R′′′);


Monothiohypophosphoric Acids,
(R—O—)(R′—S—)P(═S)—P(═O)(—S—R′′)(—O—R′′′); or


Bis(monothiohypophosphoric acids), and
(R—S—)(R′—S—)P(═S)—P(═O)(—S—R′′)(—S—R′′′),


Poly(monothiohypophosphoric acids), and
where R, R′, R′′, and R′′′ represent H, NH2 or


derivatives thereof (S—O Bidentates, S—O
any organic functional group wherein the


Tridentates, S—O Tetradentates)
number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms. Note: these ligands are not to



be confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)R′′R′′′P(═O)



which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


S—O Valence Stabilizer #6:
(RR′—N—)(R′′R′′′—N—)P(═S)—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Monothiohypophosphoramides,
where R, R′, R′′, R′′′,


Bis(monothiohypophosphoramides), and
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Poly(monothiohypophosphoramides) (S—O
any organic functional group wherein the


Bidentates, S—O Tridentates, S—O
number of carbon atoms ranges from 0 to 40,


Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms. Note: these ligands are not to



be confused with hypophosphorous acid



derivatives (hypophosphites) (R—O—)



R′′R′′′P(═O) which are very reducing and



therefore unacceptable for stabilization of high



valence states in metal ions.


S—O Valence Stabilizer #7:
(R—O—)(R′—O—)P(═S)—NH—P(═O)(—O—R′′)(—O—R′′′);


Monothioimidodiphosphoric Acids,
(R—O—)(R′—S—)P(═S)—NH—P(═O)(—S—R′′)(—O—R′′′);


Monothiohydrazidodiphosphoric Acids,
or (R—S—)(R′—S—)P(═S)—NH—P(═O)(—S—R′′)(—S—R′′′)


Bis(monothioimidodiphosphoric Acids),
for monothioimidodiphosphoric


Bis(monothiohydrazidodiphosphoric
acids, and —NH—NH—derivatives for


Acids), Poly(monothioimidodiphosphoric
monothiohydrazidodiphosphoric acids, where


Acid),
R, R′, R′′, and R′′′ represent H, NH2 or any


Poly(monothiohydrazidodiphosphoric
organic functional group wherein the number of


Acids), and derivatives thereof (S—O
carbon atoms ranges from 0 to 40, optionally


Bidentates, S—O Tridentates, S—O
having halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #8:
(RR′—N—)(R′′R′′′—N—)P(═S)—NH—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′)


Monothioimidodiphosphoramides,
for


Monothiohydrazidodiphosphoramides,
monothioimidodiphosphoramides, and —NH—NH-


Bis(monothioimidodiphosphoramides),
derivatives for


Bis(monothiohydrazidodiphosphoramides),
monothiohydrazidodiphosphoramides, where R,


Poly(monothioimidodiphosphoramides),
R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′


and
represent H, NH2 or any organic functional


Poly(monothiohydrazidodiphosphoramides)
group wherein the number of carbon atoms


(S—O Bidentates, S—O Tridentates, S—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #9:
(RR′—N—)(R′′R′′′—N—)P(═S)—S—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Monothiodiphosphoramides,
or (RR′—N—)(R′′R′′′—N—)P(═S)—O—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Bis(monothioiphosphoramides), and
where R, R′, R′′, R′′′, R′′′′, R′′′′′,


Poly(monothiodiphosphoramides) (S—O
R′′′′′′, and R′′′′′′′ represent H, NH2 or any


Bidentates, S—O Tridentates, S—O
organic functional group wherein the number of


Tetradentates)
carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #10:
(R—O—)(R′—O—)P(═S)—O—P(═O)(—O—R′′)(—O—R′′′);


Monothiodiphosphoric Acids,
(R—O—)(R′—O—)P(═S)—S—P(═O)(—O—R′′)(—O—R′′′);


Bis(monothioiphosphoric Acids),
(R—O—)(R′—S—)P(═S)—O—P(═O)(—S—R′′)(—O—R′′′);


Poly(monothiodiphosphoric Acids), and
(R—O—)(R′—S—)P(═S)—S—P(═O)(—S—R′′)(—O—R′′′);


derivatives thereof (S—O Bidentates, S—O
or (R—S—)(R′—S—)P(═S)—S—P(═O)(—S—R′′)(—S—R′′′),


Tridentates, S—O Tetradentates)
where R, R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′, and



R′′′′′′′ represent H, NH2 or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #11:
RR′N+═C(OH)(SH), where R and R′ represent


Monothiocarbamates,
H, OH, SH, OR′′ (R′′═C1–C30 alkyl or aryl), SR′′


Bis(monothiocarbamates), and
(R′′═C1–C30 alkyl or aryl), NH2 or any organic


Poly(monothiocarbamates) (including N-
functional group wherein the number of carbon


hydroxymonothiocarbamates and N-
atoms ranges from 0 to 40, optionally having


mercaptomonothiocarbamates) (S—O
halogen or polarizing or water-


Bidentates, S—O Tridentates, and S—O
insolubilizing/solubilizing groups attached.


Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


Miscellaneous Valence Stabilizer #1:
Hydroxo and oxo ligands bound directly to the


Hydroxo and Oxo Ligands
high valence metal ion.









N Valence Stabilizer #1: Examples of monoamines (N monodentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: ammonia; ethylamine; n-dodecylamine; octylamine; phenylamine; cyclohexylamine; diethylamine; dioctylamine; diphenylamine; dicyclohexylamine; azetidine; hexamethylenetetramine (Urotropin); aziridine; azepine; pyrrolidine; benzopyrrolidine; dibenzopyrrolidine; naphthopyrrolidine; piperidine; benzopiperidine; dibenzopiperidine; naphthopiperidine; azacycloheptane (hexamethyleneimine); aminonorbornane; adamantanamine; aniline; benzylamine; toluidine; phenethylamine; xylidine; cumidine; naphthylamine; polyalkylamines; polyanilines; and fluorenediamine.

N Valence Stabilizer #2: Examples of diamines (N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hydrazine; phenylhydrazine; 1,1-diphenylhydrazine; 1,2-diphenylhydrazine (hydrazobenzene); methanediamine; ethylenediamine (1,2-ethanediamine, en); trimethylenediamine (1,3-propanediamine); putrescine (1,4-butanediamine); cadaverine (1,5-pentanediamine); hexamethylenediamine (1,6-hexanediamine); 2,3-diaminobutane; stilbenediamine (1,2-diphenyl-1,2-ethanediamine); cyclohexane-1,2-diamine; cyclopentane-1,2-diamine; 1,3-diazacyclopentane; 1,3-diazacyclohexane; piperazine; benzopiperazine; dibenzopiperazine; naphthopiperazine; diazepine; thiadiazepine; oxodiazepine; sparteine (lupinidine); 2-(aminomethyl)azacyclohexane; 2-(aminomethyl)piperidine; 2-(aminomethyl)pyrrolidine; 2-(aminomethyl)azetidine; 2-(2-aminoethyl)aziridine; 1,2-diaminobenzene; benzidine; bis(2,2′-piperazino)-1,2-ethene; 1,4-diazabicyclo[2.2.2]octane; naphthylethylenediamine; and 1,2-dianilinoethane.

N Valence Stabilizer #3: Examples of triamines (N—N bidentates or N—N tridentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-(2-aminoethyl)-1,2-ethanediamine (dien, 2,2-tri); N-(2-aminoethyl)-1,3-propanediamine (2,3-tri); N-(3aminopropyl)-1,3-propanediamine (3,3-tri, dpt); N-(3-aminopropyl)-1,4-butanediamine (3,4-tri, spermidine); N-(2-aminoethyl)-1,4-butanediamine (2,4-tri); N-(6-hexyl)-1,6-hexanediamine (6,6-tri); 1,3,5-triaminocyclohexane (tach); 2-(aminomethyl)-1,3-propanediamine (tamm); 2-(aminomethyl)-2-methyl-1,3-propanediamine (tame); 2-(aminomethyl)-2-ethyl-1,3-propanediamine (tamp); 1,2,3-triaminopropane (tap); 2,3-(2-aminoethyl)aziridine; 2,4-(aminomethyl)azetidine; 2,5-(aminomethyl)pyrrolidine; 2,6-(aminomethyl)piperidine; di(2-aminobenzyl)amine; hexahydro-1,3,5-triazine; hexahydro-2,4,6-trimethyl-1,3,5-triazine; and 1,3,5-tris(aminomethyl)benzene.

N Valence Stabilizer #4: Examples of tetramines (N—N bidentates, N—N tridentates, or N—N tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-(2-aminoethyl)-1,2-ethanediamine (2,2,2-tet, trien (triethylenetetramine)); N,N′-(2-aminoethyl)-1,3-propanediamine (2,3,2-tet, entnen); N,N′-(3-aminopropyl)-1,2-ethanediamine (3,2,3-tet, tnentn); N-(2-aminoethyl)-N′-(3-aminopropyl)-1,2-ethanediamine (2,2,3-tet); N-(2-aminoethyl)-N′-(3-aminopropyl)-1,3-propanediamine (3,3,2-tet); N,N′-(3-aminopropyl)-1,3-propanediamine (3,3,3-tet); N,N′-(3-aminopropyl)-1,4-butanediamine (3,4,3-tet, spermine); tri(aminomethyl)amine (tren); tri(2-aminoethyl)amine (trtn); tri(3-aminopropyl)amine (trbn); 2,2-aminomethyl-1,3-propanediamine (tam); 1,2,3,4-tetraminobutane (tab); N,N′-(2-aminophenyl)-1,2-ethanediamine; and N,N′-(2-aminophenyl)-1,3-propanediamine.

N Valence Stabilizer #5: Examples of pentamines (N—N bidentates, N—N tridentates, or N—N tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N—[N-(2-aminoethyl)-2-aminoethyl]-N′-(2-aminoethyl)-1,2-ethanediamine (2,2,2,2-pent, tetren); N—[N-(3-aminopropyl)-2-aminoethyl]-N′-(3-aminopropyl)-1,2-ethanediamine (3,2,2,3-pent); N—[N-(3-aminopropyl)-3-aminopropyl]-N′-(3-aminopropyl)-1,3-propanediamine (3,3,3,3-pent, caldopentamine); N—[N-(2-aminobenzyl)-2-aminoethyl]-N′-(2-aminopropyl)-1,2-ethanediamine; N—[N-(2-aminoethyl)-2-aminoethyl]-N,N-(2-aminoethyl)amine (trenen); and N—[N-(2-aminopropyl)-2-aminoethyl]-N,N-(2-aminoethyl)amine (4-Me-trenen).

N Valence Stabilizer #6: Examples of hexamines (N—N bidentates, N—N tridentates, N—N tetradentates, or N—N—N—N—N—N hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-[N-(2-aminoethyl)-2-aminoethyl]-1,2-ethanediamine (2,2,2,2,2-hex, linpen); N,N′-[N-(2-aminoethyl)-3-aminopropyl]-1,2-ethanediamine (2,3,2,3,2-hex); N,N,N′,N′-(2-aminoethyl)-1,2-ethanediamine (penten, ten); N,N,N′,N′-(2-aminoethyl)-1-methyl-1,2-ethanediamine (tpn, R-5-Me-penten); N,N,N′,N′-(2-aminoethyl)-1,3-propanediamine (ttn); N,N,N′,N′-(2-aminoethyl)-1,4-butanediamine (tbn); N,N,N′,N′-(2-aminoethyl)-1,3-dimethyl-1,3-propanediamine (R,R-tptn, R,S-tptn); N-(2-aminoethyl)-2,2-[N-(2-aminoethyl)aminomethyl-1-propaneamine (sen); and N-(3-aminopropyl)-2,2-[N-(3-aminopropyl)aminomethyl-1-propaneamine (stn).

N Valence Stabilizer #7a: Examples of 5-membered heterocyclic rings containing one nitrogen atom (N monodentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1-pyrroline, 2-pyrroline, 3-pyrroline, pyrrole, oxazole, isoxazole, thiazole, isothiazole, azaphosphole, benzopyrroline, benzopyrrole (indole), benzoxazole, benzisoxazole, benzothiazole, benzisothiazole, benzazaphosphole, dibenzopyrroline, dibenzopyrrole (carbazole), dibenzoxazole, dibenzisoxazole, dibenzothiazole, dibenzisothiazole, naphthopyrroline, naphthopyrrole, naphthoxazole, naphthisoxazole, naphthothiazole, naphthisothiazole, naphthazaphosphole, and polypyrroles.

N Valence Stabilizer #7b: Examples of 5-membered heterocyclic rings containing two nitrogen atoms (N monodentates or N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pyrazoline, imidazoline, imidazole (ia), pyrazole, oxadiazole, thiadiazole, diazaphosphole, benzopyrazoline, benzimidazoline, benzimidazole (azindole)(bia)(bz), benzopyrazole (indazole), benzothiadiazole (piazthiole), benzoxadiazole (benzofurazan), naphthopyrazoline, naphthimidazoline, naphthimidazole, naphthopyrazole, naphthoxadiazole, naphthothiadiazole, polybenzimidazole, and polyimidazoles (e.g. polyvinylimidazole (pvi)).

N Valence Stabilizer #7c: Examples of 5-membered heterocyclic rings containing three nitrogen atoms (N monodentates, N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triazole, oxatriazole, thiatriazole, benzotriazole (bta), tolyltriazole (tt), naphthotriazole, and triazolophthalazine.

N Valence Stabilizer #7d: Examples of 5-membered heterocyclic rings containing four nitrogen atoms (N monodentates or N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrazole.

N Valence Stabilizer #8a: Examples of 6-membered heterocyclic rings containing one nitrogen atom (N monodentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pyridine, picoline, lutidine, γ-collidine, oxazine, thiazine, azaphosphorin, quinoline, isoquinoline, benzoxazine, benzothiazine, benzazaphosphorin, acridine, phenanthridine, phenothiazine (dibenzothiazine), dibenzoxazine, dibenzazaphosphorin, benzoquinoline (naphthopyridine), naphthoxazine, naphthothiazine, naphthazaphosphorin, and polypyridines.

N Valence Stabilizer #8b: Examples of 6-membered heterocyclic rings containing two nitrogen atoms (N monodentates or N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pyrazine, pyridazine, pyrimidine, oxadiazine, thiadiazine, diazaphosphorin, quinoxaline (benzopyrazine), cinnoline (benzo[c]pyridazine), quinazoline (benzopyrimidine), phthalazine (benzo[d]pyridazine), benzoxadiazine, benzothiadiazine, phenazine (dibenzopyrazine), dibenzopyridazine, naphthopyrazine, naphthopyridazine, naphthopyrimidine, naphthoxadiazine, naphthothiadiazine, and polyquinoxalines.

N Valence Stabilizer #8c: Examples of 6-membered heterocyclic rings containing three nitrogen atoms (N monodentates or N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3,5-triazine, 1,2,3-triazine, benzo-1,2,3-triazine, naphtho-1,2,3-triazine, oxatriazine, thiatriazine, melamine, and cyanuric acid.

N Valence Stabilizer #8d: Examples of 6-membered heterocyclic rings containing four nitrogen atoms (N monodentates or N—N bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrazine.

N Valence Stabilizer #9a: Examples of 5-membered heterocyclic rings containing one nitrogen atom and having at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(aminomethyl)-3-pyrroline; 2,5-(aminomethyl)-3-pyrroline; 2-(aminomethyl)pyrrole; 2,5-(aminomethyl)pyrrole; 3-(aminomethyl)isoxazole; 2-(aminomethyl)thiazole; 3-(aminomethyl)isothiazole; 2-(aminomethyl)indole; 2-aminobenzoxazole; 2-aminobenzothiazole (abt); 1,8-diaminocarbazole; 2-amino-6-methyl-benzothiazole (amebt); 2-amino-6-methoxybenzothiazole (ameobt), and 1,3-diiminoisoindoline.

N Valence Stabilizer #9b: Examples of 5-membered heterocyclic rings containing two nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminoimidazoline; 1-(3-aminopropyl)imidazoline; 2-aminoimidazole; 1-(3-aminopropyl)imidazole; 4-(2-aminoethyl)imidazole[histamine]; 1-alkyl-4-(2-aminoethyl)imidazole; 3-(2-aminoethyl)pyrazole; 3,5-(2-aminoethyl)pyrazole; 1-(aminomethyl)pyrazole; 2-aminobenzimidazole; 7-(2-aminoethyl)benzimidazole; 1-(3-aminopropyl)benzimidazole; 3-(2-aminoethyl)indazole; 3,7-(2-aminoethyl)indazole; 1-(aminomethyl)indazole; 7-aminobenzothiadiazole; 4-(2-aminoethyl)benzothiadiazole; 7-aminobenzoxadiazole; 4-(2-aminoethyl)benzoxadiazole; ethylenediaminetetra(1-pyrazolylmethane) [edtp]; methylenenitrilotris(2-(1-methyl)benzimidazole) [mntb][tris(1-methyl-2-benzimidazolylmethane)amine]; bis(alkyl-1-pyrazolylmethane)amine; bis(alkyl-2-(1-pyrazolyl)ethane)amine; bis(N,N-(2-benzimidazolyl)-2-aminoethane)(2-benzimidazolylmethane)amine; bis(1-(3,5-dimethyl)pyrazolylmethane)phenylamine; tris(2-(1-(3,5-dimethyl)pyrazolyl)ethane)amine; 5-(dimethylamino)pyrazole; 5-(dimethylaminomethyl)pyrazole; 2-amino-1,3,4-thiadiazole; and 1-(2-aminoethyl)imidazoline.

N Valence Stabilizer #9c: Examples of 5-membered heterocyclic rings containing three nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N—N Tridentates, N—N—N—N Tetradentates, or N—N—N—N—N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-amino-1,2,4-triazole (ata); 3,5-diamino-1,2,4-triazole (dat); 5-amino-1,2,4-triazole; 3-(2-aminoethyl)-1,2,4-triazole; 5-(2-aminoethyl)-1,2,4-triazole; 3,5-(2-aminoethyl)-1,2,4-triazole; 1-(aminomethyl)-1,2,4-triazole; 3,5-(aminomethyl)-4-amino-1,2,4-triazole; 4-(2-aminoethyl)-1,2,3-triazole; 5-(2-aminoethyl)-1,2,3-triazole; 7-aminobenzotriazole; 1-(aminomethyl)-1,2,3-triazole; 1-(2-aminoethyl)-1,2,3-triazole; 4-(3-aminopropyl)benzotriazole; N-(benzotriazolylalkyl)amine; dibenzotriazole-1-ylalkylamine; bis(5-amino-1,2,4-triazol-3-yl); bis(5-amino-1,2,4-triazol-3-yl)alkanes; and 1-(aminomethyl)benzotriazole.

N Valence Stabilizer #9d: Examples of 5-membered heterocyclic rings containing four nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 5-(2-aminoethyl)-1H-tetrazole; 1-(aminomethyl)-1H-tetrazole; and 1-(2-aminoethyl)-1H-tetrazole.

N Valence Stabilizer #10a: Examples of 6-membered heterocyclic rings containing one nitrogen atom and having at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminopyridine; 2,6-diaminopyridine; 2-(aminomethyl)pyridine; 2,6-(aminomethyl)pyridine; 2,6-(aminoethyl)pyridine; 2-amino-4-picoline; 2,6-diamino-4-picoline; 2-amino-3,5-lutidine; 2-aminoquinoline; 8-aminoquinoline; 2-aminoisoquinoline; acriflavine; 4-aminophenanthridine; 4,5-(aminomethyl)phenothiazine; 4,5-(aminomethyl)dibenzoxazine; 10-amino-7,8-benzoquinoline; bis(2-pyridylmethane)amine; tris(2-pyridyl)amine; bis(4-(2-pyridyl)-3-azabutane)amine; bis(N,N-(2-(2-pyridyl)ethane)aminomethane)amine; 4-(N,N-dialkylaminomethyl)morpholine; 6-aminonicotinic acid; 8-aminoacridine; and 2-hydrazinopyridine.

N Valence Stabilizer #10b: Examples of 6-membered heterocyclic rings containing two nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminopyrazine; 2,6-diaminopyrazine; 2-(aminomethyl)pyrazine; 2,6-(aminomethyl)pyrazine; 3-(aminomethyl)pyridazine; 3,6-(aminomethyl)pyridazine; 3,6-(2-aminoethyl)pyridazine; 1-aminopyridazine; 1-(aminomethyl)pyridazine; 2-aminopyrimidine; 1-(2-aminoethyl)pyrimidine; 2-aminoquinoxaline; 2,3-diaminoquinoxaline; 2-aminocinnoline; 3-aminocinnoline; 3-(2-aminoethyl)cinnoline; 3,8-(2-aminoethyl)cinnoline; 2-aminoquinazoline; 1-(2-aminoethyl)quinazoline; 1-aminophthalazine; 1,4-(2-aminoethyl)phthalazine; 1,8-(aminomethyl)phenazine; 2-amino-4,6-dimethylpyrimidine (admp); dihydralazine; and hydralazine.

N Valence Stabilizer #10c: Examples of 6-membered heterocyclic rings containing three nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-amino-1,3,5-triazine; 2-(aminomethyl)-1,3,5-triazine; 2,6-(aminomethyl)-1,3,5-triazine; 1-(3-aminopropyl)-1,3,5-triazine; 1,5-(3-aminopropyl)-1,3,5-triazine, polymelamines; melamine; and altretamine.

N Valence Stabilizer #10d: Examples of 6-membered heterocyclic rings containing four nitrogen atoms at least one additional nitrogen atom binding site not contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3,6-(2-aminoethyl)-1,2,4,5-tetrazine; 3,6-(1,3-diamino-2-propyl)-1,2,4,5-tetrazine; and 4,6-(aminomethyl)-1,2,3,5-tetrazine.

N Valence Stabilizer #11a: Examples of 5-membered heterocyclic rings containing one nitrogen atom and having at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-3-pyrroline; 2,2′-bi-2-pyrroline; 2,2′-bi-1-pyrroline; 2,2′-bipyrrole; 2,2′,2′′-tripyrrole; 3,3′-biisoxazole; 2,2′-bioxazole; 3,3′-biisothiazole; 2,2′-bithiazole; 2,2′-biindole; 2,2′-bibenzoxazole; 2,2′-bibenzothiazole; bilirubin; biliverdine; and 7-azaindole.

N Valence Stabilizer #11b: Examples of 5-membered heterocyclic rings containing two nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2-imidazoline[2,2′-bi-2-imidazolinyl][bimd]; 2,2′-biimidazole[2,2′-biimidazolyl][biimH2]; 5,5′-bipyrazole; 3,3′-bipyrazole; 4,4′-bipyrazole[4,4′-bipyrazolyl][bpz]; 2,2′-bioxadiazole; 2,2′-bithiadiazole; 2,2′-bibenzimidazole; 7,7′-biindazole; 5,5′-bibenzofurazan; 5,5′-bibenzothiadiazole; bis-1,2-(2-benzimidazole)ethane; bis(2-benzimidazole)methane; 1,2-(2-imidazolyl)benzene; 2-(2-thiazolyl)benzimidazole; 2-(2-imidazolyl)benzimidazole; benzimidazotriazine; 4-azabenzimidazole; and 2,6-bis(2-benzimidazolyl)pyridine.

N Valence Stabilizer #11c: Examples of 5-membered heterocyclic rings containing three nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 5,5′-bi-1,2,4-triazole[btrz]; 3,3′-bi-1,2,4-triazole; 1,1′-bi-1,2,4-triazole; 1,1′-bi-1,2,3-triazole; 5,5′-bi-1,2,3-triazole; 7,7′-bibenzotriazole; 1,1′-bibenzotriazole; bis(pyridyl)aminotriazole (pat); and 8-azaadenine.

N Valence Stabilizer #11d: Examples of 5-membered heterocyclic rings containing four nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 5,5′-bi-1H-tetrazole; and 1,1′-bi-1H-tetrazole.

N Valence Stabilizer #12a: Examples of 6-membered heterocyclic rings containing one nitrogen atom and having at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bipyridine [bipy]; 2,2′,2′′-tripyridine [terpyridine][terpy]; 2,2′,2′′,2′′′-tetrapyridine [tetrapy]; 6,6′-bi-2-picoline; 6,6′-bi-3-picoline; 6,6′-bi-4-picoline; 6,6′-bi-2,3-lutidine; 6,6′-bi-2,4-lutidine; 6,6′-bi-3,4-lutidine; 6,6′-bi-2,3,4-collidine; 2,2′-biquinoline; 2,2′-biisoquinoline; 3,3′-bibenzoxazine; 3,3′-bibenzothiazine; 1,10-phenanthroline [phen]; 1,8-naphthyridine; bis-1,2-(6-(2,2′-bipyridyl))ethane; bis-1,3-(6-(2,2′-bipyridyl))propane; 3,5-bis(3-pyridyl)pyrazole; 3,5-bis(2-pyridyl)triazole; 1,3-bis(2-pyridyl)-1,3,5-triazine; 1,3-bis(2-pyridyl)-5-(3-pyridyl)-1,3,5-triazine; 2,7-(N,N′-di-2-pyridyl)diaminobenzopyrroline; 2,7-(N,N′-di-2-pyridyl)diaminophthalazine; 2,6-di-(2-benzothiazolyl)pyridine; triazolopyrimidine; 2-(2-pyridyl)imidazoline; 7-azaindole; 1-(2-pyridyl)pyrazole; (1-imidazolyl)(2-pyridyl)methane; 4,5-bis(N,N′-(2-(2-pyridyl)ethyl)iminomethyl)imidazole; bathophenanthroline; 4-(2-benzimidazolyl)quinoline; 1,2-bis(2-pyridyl)ethane; 4,4′-diphenyl-2,2′-dipyridyl; neocuproine; nicotine; and nornicotine.

N Valence Stabilizer #12b: Examples of 6-membered heterocyclic rings containing two nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bipyrazine; 2,2′,2′′-tripyrazine; 6,6′-bipyridazine; bis(3-pyridazinyl)methane; 1,2-bis(3-pyridazinyl)ethane; 2,2′-bipyrimidine; 2,2′-biquinoxaline; 8,8′-biquinoxaline; bis(3-cinnolinyl)methane; bis(3-cinnolinyl)ethane; 8,8′-bicinnoline; 2,2′-biquinazoline; 4,4′-biquinazoline; 8,8′-biquinazoline; 2,2′-biphthalazine; 1,1′-biphthalazine; 2-(2-pyridyl)benzimidazole; 8-azapurine; purine; adenine; guanine; hypoxanthine; 2,6-bis(N,N′-(2-(4-imidazolyl)ethyl)iminomethyl)pyridine; 2-(N-(2-(4-imidazolyl)ethyl)iminomethyl)pyridine; adenine (aminopurine); purine; and 2,3-bis(2-pyridyl)pyrazine.

N Valence Stabilizer #12c: Examples of 6-membered heterocyclic rings containing three nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3,5-triazine; 2,2′, 2′′-tri-1,3,5-triazine; 4,4′-bi-1,2,3-triazine; and 4,4′-bibenzo-1,2,3-triazine; 2,4,6-tris(2-pyridyl)-1,3,5-triazine; and benzimidazotriazines.

N Valence Stabilizer #12d: Examples of 6-membered heterocyclic rings containing four nitrogen atoms at least one additional nitrogen atom binding site contained in a ring (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3,3′-bi-1,2,4,5-tetrazine; and 4,4′-bi-1,2,3,5-tetrazine.

N Valence Stabilizer #13a: Examples of two-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein both binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclobutane ([4]aneN2); diazacyclopentane ([5]aneN2); diazacyclohexane ([6]aneN2); diazacycloheptane ([7]aneN2); diazacyclooctane ([8]aneN2); piperazine; benzopiperazine; diazacyclobutene ([4]eneN2); diazacyclopentene ([5]eneN2); diazacyclohexene ([6]eneN2); diazacycloheptene ([7]eneN2); diazacyclooctene ([8]eneN2); diazacyclobutadiene ([4]dieneN2); diazacyclopentadiene ([5]dieneN2); diazacyclohexadiene ([6]dieneN2); diazacycloheptadiene ([7]dieneN2); and diazacyclooctadiene ([8]dieneN2)

N Valence Stabilizer #13b: Examples of three-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triazacyclohexane (including hexahydro-1,3,5-triazine)([6]aneN3); triazacycloheptane ([7]aneN3); triazacyclooctane ([8]aneN3); triazacyclononane ([9]aneN3); triazacyclodecane ([10]aneN3); triazacycloundecane ([11]aneN3); triazacyclododecane ([12]aneN3); triazacyclohexene ([6]eneN3); triazacycloheptene ([7]eneN3); triazacyclooctene ([8]eneN3); triazacyclononene ([9]eneN3); triazacyclodecene ([10]eneN3); triazacycloundecene ([11]eneN3); triazacyclododecene ([12]eneN3); triazacyclohexatriene ([6]trieneN3); triazacycloheptatriene ([7]trieneN3); triazacyclooctatriene ([8]trieneN3); triazacyclononatriene ([9]trieneN3); triazacyclodecatriene ([10]trieneN3); triazacycloundecatriene ([11]trieneN3); and triazacyclododecatriene ([12]trieneN3).

N Valence Stabilizer #13c: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraazacyclooctane ([8]aneN4); tetraazacyclononane ([9]aneN4); tetraazacyclodecane ([10]aneN4); tetraazacycloundecane ([11]aneN4); tetraazacyclododecane ([12]aneN4); tetraazacyclotridecane ([13]aneN4); tetraazacyclotetradecane ([14]aneN4); tetraazacyclopentadecane ([15]aneN4); tetraazacyclohexadecane ([16]aneN4); tetraazacycloheptadecane ([17]aneN4); tetraazacyclooctadecane ([18]aneN4); tetraazacyclononadecane ([19]aneN4); tetraazacycloeicosane ([20]aneN4); tetraazacyclooctadiene ([8]dieneN4); tetraazacyclononadiene ([9]dieneN4); tetraazacyclodecadiene ([10]dieneN4); tetraazacycloundecadiene ([11]dieneN4); tetraazacyclododecadiene ([12]dieneN4); tetraazacyclotridecadiene ([13]dieneN4); tetraazacyclotetradecadiene ([14]dieneN4); tetraazacyclopentadecadiene ([15]dieneN4); tetraazacyclohexadecadiene ([16]dieneN4); tetraazacycloheptadecadiene ([17]dieneN4); tetraazacyclooctadecadiene ([18]dieneN4); tetraazacyclononadecadiene ([19]dieneN4); tetraazacycloeicosadiene ([20]dieneN4); tetraazacyclooctatetradiene ([8]tetradieneN4); tetraazacyclononatetradiene ([9]tetradieneN4); tetraazacyclodecatetradiene ([10]tetradieneN4); tetraazacycloundecatetradiene ([11]tetradieneN4); tetraazacyclododecatetradiene ([12]tetradieneN4); tetraazacyclotridecatetradiene ([13]tetradieneN4); tetraazacyclotetradecatetradiene ([14]tetradieneN4); tetraazacyclopentadecatetradiene ([15]tetradieneN4); tetraazacyclohexadecatetradiene ([16]tetradieneN4); tetraazacycloheptadecatetradiene ([17]tetradieneN4); tetraazacyclooctadecatetradiene ([18]tetradieneN4); tetraazacyclononadecatetradiene ([19]tetradieneN4); and tetraazacycloeicosatetradiene ([20]tetradieneN4).

N Valence Stabilizer #13d: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaazacyclododecane ([12]aneN6); hexaazacyclotridecane ([13]aneN6); hexaazacyclotetradecane ([14]aneN6); hexaazacyclopentadecane ([15]aneN6); hexaazacyclohexadecane ([16]aneN6); hexaazacycloheptadecane ([17]aneN6); hexaazacyclooctadecane ([18]aneN6); hexaazacyclononadecane ([19]aneN6); hexaazacycloeicosane ([20]aneN6); hexaazacycloheneicosane ([21]aneN6); hexaazacyclodocosane ([22]aneN6); hexaazacyclotricosane ([23]aneN6); hexaazacyclotetracosane ([24]aneN6); hexaazacyclododecatriene ([12]trieneN6); hexaazacyclotridecatriene ([13]trieneN6); hexaazacyclotetradecatriene ([14]trieneN6); hexaazacyclopentadecatriene ([15]trieneN6); hexaazacyclohexadecatriene ([16]trieneN6); hexaazacycloheptadecatriene ([17]trieneN6); hexaazacyclooctadecatriene ([18]trieneN6); hexaazacyclononadecatriene ([19]trieneN6); hexaazacycloeicosatriene ([20]trieneN6); hexaazacycloheneicosatriene ([21]trieneN6); hexaazacyclodocosatriene ([22]trieneN6); hexaazacyclotricosatriene ([23]trieneN6); and hexaazacyclotetracosatriene ([24]trieneN6).

N Valence Stabilizer #13e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octaazacyclohexadecane ([16]aneN8); octaazacycloheptadecane ([17]aneN8); octaazacyclooctadecane ([18]aneN8); octaazacyclononadecane ([19]aneN8); octaazacycloeicosane ([20]aneN8); octaazacycloheneicosane ([21]aneN8); octaazacyclodocosane ([22]aneN8); octaazacyclotricosane ([23]aneN8); octaazacyclotetracosane ([24]aneN8); octaazacyclohexadecatetradiene ([16]tetradieneN8); octaazacycloheptadecatetradiene ([17]tetradieneN8); octaazacyclooctadecatetradiene ([18]tetradieneN8); octaazacyclononadecatetradiene ([19]tetradieneN8); octaazacycloeicosatetradiene ([20]tetradieneN8); octaazacycloheneicosatetradiene ([21]tetradieneN8); octaazacyclodocosatetradiene ([22]tetradieneN8); octaazacyclotricosatetradiene ([23]tetradieneN8); and octaazacyclotetracosatetradiene ([24]tetradieneN8).

N Valence Stabilizer #13f: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: decaazacycloeicosane ([20]aneN10); decaazacycloheneicosane ([21]aneN10); decaazacyclodocosane ([22]aneN10); decaazacyclotricosane ([23]aneN10); decaazacyclotetracosane ([24]aneN10); decaazacyclopentacosane ([25]aneN10); decaazacyclohexacosane ([26]aneN10); decaazacycloheptacosane ([27]aneN10); decaazacyclooctacosane ([28]aneN10); decaazacyclononacosane ([29]aneN10); decaazacyclotriacontane ([30]aneN10); decaazacycloeicosapentadiene ([20]pentadieneN10); decaazacycloheneicosapentadiene ([21]pentadieneN10); decaazacyclodocosapentadiene ([22]pentadieneN10); decaazacyclotricosapentadiene ([23]pentadieneN10); decaazacyclotetracosapentadiene ([24]pentadieneN10); decaazacyclopentacosapentadiene ([25]pentadieneN10); decaazacyclohexacosapentadiene ([26]pentadieneN10); decaazacycloheptacosapentadiene ([27]pentadieneN10); decaazacyclooctacosapentadiene ([28]pentadieneN10); decaazacyclononacosapentadiene ([29]pentadieneN10); and decaazacyclotriacontapentadiene ([30]pentadieneN10).

N Valence Stabilizer #14a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: porphyrins (including tetraphenylporphine (tpp); “picket fence” porphyrins, “picket tail” porphyrins, “bispocket” porphyrins, “capped” porphyrins, cyclophane porphyrins, “pagoda” porphyrins, “pocket” porphyrins, “pocket tail” porphyrins, cofacial diporphyrins, “strapped” porphyrins, “hanging base” porphyrins, bridged porphyrins, chelated mesoporphyrins, homoporphyrins, chlorophylls, and pheophytins); porphodimethanes; porphyrinogens; chlorins; bacteriochlorins; isobacteriochlorins; corroles; corrins and corrinoids; didehydrocorrins; tetradehydrocorrins; hexadehydrocorrins; octadehydrocorrins; tetraoxazoles; tetraisooxazoles; tetrathiazoles; tetraisothiazoles; tetraazaphospholes; tetraimidazoles; tetrapyrazoles; tetraoxadiazoles; tetrathiadiazoles; tetradiazaphospholes; tetratriazoles; tetraoxatriazoles; tetrathiatriazoles; coproporphyrin; etioporphyrin; and hematoporphyrin.

N Valence Stabilizer #14b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaphyrins (hexapyrroles); hexaoxazoles; hexaisooxazoles; hexathiazoles; hexaisothiazoles; hexaazaphospholes; hexaimidazoles; hexapyrazoles; hexaoxadiazoles; hexathiadiazoles; hexadiazaphospholes; hexatriazoles; hexaoxatriazoles; and hexathiatriazoles.

N Valence Stabilizer #14c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octaphyrins (octapyrroles); octaoxazoles; octaisooxazoles; octathiazoles; octaisothiazoles; octaazaphospholes; octaimidazoles; octapyrazoles; octaoxadiazoles; octathiadiazoles; octadiazaphospholes; octatriazoles; octaoxatriazoles; and octathiatriazoles.

N Valence Stabilizer #14d: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: decaphyrins (decapyrroles); decaoxazoles; decaisooxazoles; decathiazoles; decaisothiazoles; decaazaphospholes; decaimidazoles; decapyrazoles; decaoxadiazoles; decathiadiazoles; decadiazaphospholes; decatriazoles; decaoxatriazoles; and decathiatriazoles.

N Valence Stabilizer #15a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: porphyrazines; octahydrodiazaporphyrins; phthalocyanines; naphthalocyanines; anthracocyanines; and tetraazaporphyrins

N Valence Stabilizer #15b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazahexaphyrins; tetraazahexaphyrins; hexaazahexaphyrins; diazahexapyrazoles; tetraazahexapyrazoles; hexaazahexapyrazoles; diazahexaimidazoles; tetraazahexaimidazoles; and hexaazahexaimidazoles.

N Valence Stabilizer #15c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazaoctaphyrins; tetraazaoctaphyrins; hexaazaoctaphyrins; octaazaoctaphyrins; diazaoctapyrazoles; tetraazaoctapyrazoles; hexaazaoctapyrazoles; octaazaoctapyrazoles; diazaoctaimidazoles; tetraazaoctaimidazoles; hexaazaoctaimidazoles; and octaazaoctaimidazoles.

N Valence Stabilizer #15d: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazadecaphyrins; tetraazadecaphyrins; hexaazadecaphyrins; octaazadecaphyrins; decaazadecaphyrins; diazadecapyrazoles; tetraazadecapyrazoles; hexaazadecapyrazoles; octaazadecapyrazoles; decaazadecapyrazoles; diazadecaimidazoles; tetraazadecaimidazoles; hexaazadecaimidazoles; octaazadecaimidazoles; and decaazadecaimidazoles.

N Valence Stabilizer #16a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclotetrapyridines; cyclotetraoxazines; cyclotetrathiazines; cyclotetraphosphorins; cyclotetraquinolines; cyclotetrapyrazines; cyclotetrapyridazines; cyclotetrapyrimidines; cyclotetraoxadiazines; cyclotetrathiadiazines; cyclotetradiazaphosphorins; cyclotetraquinoxalines; cyclotetratriazines; cyclotetrathiatriazines; and cyclotetraoxatriazines.

N Valence Stabilizer #16b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclosexipyridines; cyclosexioxazines; cyclosexithiazines; cyclosexiphosphorins; cyclosexiquinolines; cyclosexipyrazines; cyclosexipyridazines; cyclosexipyrimidines; cyclosexioxadiazines; cyclosexithiadiazines; cyclosexidiazaphosphorins cyclosexiquinoxalines; cyclosexitriazines; cyclosexithiatriazines; and cyclosexioxatriazines.

N Valence Stabilizer #16c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclooctapyridines; cyclooctaoxazines; cyclooctathiazines; cyclooctaphosphorins; cyclooctaquinolines; cyclooctapyrazines; cyclooctapyridazines; cyclooctapyrimidines; cyclooctaoxadiazines; cyclooctathiadiazines; cyclooctadiazaphosphorins; cyclooctaquinoxalines; cyclooctatriazines; cyclooctathiatriazines; and cyclooctaoxatriazines.

N Valence Stabilizer #16d: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclodecapyridines; cyclodecaoxazines; cyclodecathiazines; cyclodecaphosphorins; cyclodecaquinolines; cyclodecapyrazines; cyclodecapyridazines; cyclodecapyrimidines; cyclodecaoxadiazines; cyclodecathiadiazines; cyclodecadiazaphosphorins; cyclodecaquinoxalines; cyclodecatriazines; cyclodecathiatriazines; and cyclodecaoxatriazines.

N Valence Stabilizer #17a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclotetrapyridines; tetraazacyclotetrapyridines; diazacyclotetraquinolines; tetraazacyclotetraquinolines; diazacyclotetrapyrazines; tetraazacyclotetrapyrazines; diazacyclotetrapyridazines; tetraazacyclotetrapyridazines; diazacyclotetrapyrimidines; tetraazacyclotetrapyrimidines; diazacyclotetratriazines; and tetraazacyclotetratriazines.

N Valence Stabilizer #17b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclosexipyridines; triazacyclosexipyridines; diazacyclosexiquinolines; triazacyclosexiquinolines; diazacyclosexipyrazines; triazacyclosexipyrazines; diazacyclosexipyridazines; triazacyclosexipyridazines; diazacyclosexipyrimidines; triazacyclosexipyrimidines; diazacyclosexitriazines; and triazacyclosexitriazines.

N Valence Stabilizer #17c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclooctapyridines; tetraazacyclooctapyridines; diazacyclooctaquinolines; tetraazacyclooctaquinolines; diazacyclooctapyrazines; tetraazacyclooctapyrazines; diazacyclooctapyridazines; tetraazacyclooctapyridazines; diazacyclooctapyrimidines; tetraazacyclooctapyrimidines; diazacyclooctatriazines; and tetraazacyclooctatriazines.

N Valence Stabilizer #17d: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclodecapyridines; pentaazacyclodecapyridines; diazacyclodecaquinolines; pentaazacyclodecaquinolines; diazacyclodecapyrazines; pentaazacyclodecapyrazines; diazacyclodecapyridazines; pentaazacyclodecapyridazines; diazacyclodecapyrimidines; pentaazacyclodecapyrimidines; diazacyclodecatriazines; and pentaazacyclodecatriazines.

N Valence Stabilizer #18: Examples of amidines and diamidines (N—N bidentates or N—N Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-dimethylformamidine; N,N′-diethylformamidine; N,N′-diisopropylformamidine; N,N′-dibutylformamidine; N,N′-diphenylformamidine; N,N′-dibenzylformamidine; N,N′-dinaphthylformamidine; N,N′-dicyclohexylformamidine; N,N′-dinorbornylformamidine; N,N′-diadamantylformamidine; N,N′-dianthraquinonylformamidine; N,N′-dimethylacetamidine; N,N′-diethylacetamidine; N,N′-diisopropylacetamidine; N,N′-dibutylacetamidine; N,N′-diphenylacetamidine; N,N′-dibenzylacetamidine; N,N′-dinaphthylacetamidine; N,N′-dicyclohexylacetamidine; N,N′-dinorbornylacetamidine; N,N′-diadamantylacetamidine; N,N′-dimethylbenzamidine; N,N′-diethylbenzamidine; N,N′-diisopropylbenzamidine; N,N′-dibutylbenzamidine; N,N′-diphenylbenzamidine; N,N′-dibenzylbenzamidine; N,N′-dinaphthylbenzamidine; N,N′-dicyclohexylbenzamidine; N,N′-dinorbornylbenzamidine; N,N′-diadamantylbenzamidine; N,N′-dimethyltoluamidine; N,N′-diethyltoluamidine; N,N′-diisopropyltoluamidine; N,N′-dibutyltoluamidine; N,N′-diphenyltoluamidine; N,N′-dibenzyltoluamidine; N,N′-dinaphthyltoluamidine; N,N′-dicyclohexyltoluamidine; N,N′-dinorbornyltoluamidine; N,N′-diadamantyltoluamidine; oxalic diamidine; malonic diamidine; succinic diamidine; glutaric diamidine; adipic diamidine; pimelic diamidine; suberic diamidine; phthalic diamidine; terephthalic diamidine; isophthalic diamidine; piperazine diamidine; 2-iminopyrrolidine; 2-iminopiperidine; amidinobenzamide; benzamidine; chloroazodin; and debrisoquin.

N Valence Stabilizer #19: Examples of biguanides (imidodicarbonimidic diamides), biguanidines, imidotricarbonimidic diamides, imidotetracarbonimidic diamides, dibiguanides, bis(biguanidines), polybiguanides, and poly(biguanidines) (N—N bidentates, N—N tridentates, N—N tetradentates, and N—N hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: biguanide (bigH); biguanidine, methylbiguanide; ethylbiguanide; isopropylbiguanide; butylbiguanide; benzylbiguanide; phenylbiguanide; tolylbiguanide; naphthylbiguanide; cyclohexylbiguanide; norbornylbiguanide; adamantylbiguanide; dimethylbiguanide; diethylbiguanide; diisopropylbiguanide; dibutylbiguanide; dibenzylbiguanide; diphenylbiguanide; ditolylbiguanide; dinaphthylbiguanide; dicyclohexylbiguanide; dinorbornylbiguanide; diadamantylbiguanide; ethylenedibiguanide; propylenedibiguanide; tetramethylenedibiguanide; pentamethylenedibiguanide; hexamethylenedibiguanide; heptamethylenedibiguanide; octamethylenedibiguanide; phenylenedibiguanide; piperazinedibiguanide; oxalyldibiguanide; malonyldibiguanide; succinyldibiguanide; glutaryldibiguanide; adipyldibiguanide; pimelyldibiguanide; suberyldibiguanide; phthalyldibiguanide; paludrine; polyhexamethylene biguanide; 2-guanidinothiazole; 2-guanidinooxazole; 2-guanidinoimidazole; 3-guanidinopyrazole; 3-guanidino-1,2,4-triazole; 5-guanidinotetrazole; alexidine; buformin; and moroxydine.

N Valence Stabilizer #20: Examples of diamidinomethanes, bis(diamidinomethanes), and poly(diamidinomethanes) (N—N bidentates, N—N tridentates, N—N tetradentates, and N—N hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diamidinomethane; N-methyldiamidinomethane; N-ethyldiamidinomethane; N-isopropyldiamidinomethane; N-butyldiamidinomethane; N-benzyldiamidinomethane; N-phenyldiamidinomethane; N-tolyldiamidinomethane; N-naphthyldiamidinomethane; N-cyclohexyldiamidinomethane; N-norbornyldiamidinomethane; N-adamantyldiamidinomethane; dimethyldiamidinomethane; diethyldiamidinomethane; diisopropyldiamidinomethane; dibutyldiamidinomethane; dibenzyldiamidinomethane; diphenyldiamidinomethane; ditolyldiamidinomethane; dinaphthyldiamidinomethane; dicyclohexyldiamidinomethane; dinorbornyldiamidinomethane; diadamantyldiamidinomethane; ethylenebisdiamidinomethane; propylenebisdiamidinomethane; tetramethylenebisdiamidinomethane; pentamethylenebisdiamidinomethane; hexamethylenebisdiamidinomethane; heptamethylenebisdiamidinomethane; octamethylenebisdiamidinomethane; phenylenebisdiamidinomethane; piperazinebisdiamidinomethane; oxalylbisdiamidinomethane; malonylbisdiamidinomethane; succinylbisdiamidinomethane; glutarylbisdiamidinomethane; phthalylbisdiamidinomethane; 2-amidinomethylthiazole; 2-amidinomethyloxazole; 2-amidinomethylimidazole; 3-amidinomethylpyrazole; 3-amidinomethyl-1,2,4-triazole; and 5-amidinomethyltetrazole.

N Valence Stabilizer #21: Examples of imidoylguanidines, amidinoguanidines, bis(imidoylguanidines), bis(amidinoguanidines), poly(imidoylguanidines), and poly(amidinoguanidines) (N—N bidentates, N—N tridentates, N—N tetradentates, and N—N hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetimidoylguanidine; amidinoguanidine, benzimidoylguanidine; cyclohexylimidoylguanidine; pentafluorobenzimidoylguanidine; 2-N-imidoylaminothiazole; 2-N-imidoylaminooxazole; 2-N-imidoylaminoimidazole; 3-N-imidoylaminopyrazole; 3-N-imidoylamino-1,2,4-triazole; and 5-N-imidoylaminotetrazole.

N Valence Stabilizer #22: Examples of diformamidine oxides (dicarbonimidic diamides), tricarbonimidic diamides, tetracarbonimidic diamides, bis(diformamidine oxides), and poly(diformamidine oxides) (N—N bidentates, N—N tridentates, or N—N tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diformamidine oxide; methyldiformamidine oxide; ethyldiformamidine oxide; isopropyldiformamidine oxide; butyldiformamidine oxide; benzyldiformamidine oxide; phenyldiformamidine oxide; tolyldiformamidine oxide; naphthyldiformamidine oxide; cyclohexyldiformamidine oxide; norbornyldiformamidine oxide; adamantyldiformamidine oxide; dimethyldiformamidine oxide; diethyldiformamidine oxide; diisopropyldiformamidine oxide; dibutyldiformamidine oxide; dibenzyldiformamidine oxide; diphenyldiformamidine oxide; ditolyldiformamidine oxide; dinaphthyldiformamidine oxide; dicyclohexyldiformamidine oxide; dinorbornyldiformamidine oxide; diadamantyldiformamidine oxide; 2-O-amidinohydroxythiazole; 2-O-amidinohydroxyoxazole; 2-O-amidinohydroxyimidazole; 3-O-amidinohydroxypyrazole; 3-O-amidinohydroxy-1,2,4-triazole; and 5-O-amidinohydroxytetrazole.

N Valence Stabilizer #23: Examples of diformamidine sulfides (thiodicarbonimidic diamides), thiotricarbonimidic diamides, thiotetracarbonimidic diamides, bis(diformamidine sulfides), and poly(diformamidine sulfides) (N—N bidentates, N—N tridentates, or N—N tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diformamidine sulfide; methyldiformamidine sulfide; ethyldiformamidine sulfide; isopropyldiformamidine sulfide; butyldiformamidine sulfide; benzyldiformamidine sulfide; phenyldiformamidine sulfide; tolyldiformamidine sulfide; naphthyldiformamidine sulfide; cyclohexyldiformamidine sulfide; norbornyldiformamidine sulfide; adamantyldiformamidine sulfide; dimethyldiformamidine sulfide; diethyldiformamidine sulfide; diisopropyldiformamidine sulfide; dibutyldiformamidine sulfide; dibenzyldiformamidine sulfide; diphenyldiformamidine sulfide; ditolyldiformamidine sulfide; dinaphthyldiformamidine sulfide; dicyclohexyldiformamidine sulfide; dinorbornyldiformamidine sulfide; diadamantyldiformamidine sulfide; phenylthiobisformamidine; 2-S-amidinomercaptothiazole; 2-S-amidinomercaptooxazole; 2-S-amidinomercaptoimidazole; 3-S-amidinomercaptopyrazole; 3-S-amidinomercapto-1,2,4-triazole; and 5-S-amidinomercaptotetrazole.

N Valence Stabilizer #24: Examples of imidodicarbonimidic acids, diimidodicarbonimidic acids, imidotricarbonimidic acids, imidotetracarbonimidic acids, and derivatives thereof (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodicarbonimidic acid, diimidodicarbonimidic acid, imidotricarbonimidic acid, imidotetracarbonimidic acid; O-methylimidodicarbonimidic acid; O-ethylimidodicarbonimidic acid; O-isopropylimidodicarbonimidic acid; O-phenylimidodicarbonimidic acid; O-benzylimidodicarbonimidic acid; O-cyclohexylimidodicarbonimidic acid; O-naphthylimidodicarbonimidic acid; O-norbornylimidodicarbonimidic acid; O-adamantylimidodicarbonimidic acid; O,O′-dimethylimidodicarbonimidic acid; O,O′-diethylimidodicarbonimidic acid; O,O′-diisopropylimidodicarbonimidic acid; O,O′-diphenylimidodicarbonimidic acid; O,O′-dibenzylimidodicarbonimidic acid; O,O′-dicyclohexylimidodicarbonimidic acid; O,O′-dinaphthylimidodicarbonimidic acid; O,O′-dinorbornylimidodicarbonimidic acid; and O,O′-diadamantylimidodicarbonimidic acid.

N Valence Stabilizer #25: Examples of thioimidodicarbonimidic acids, thiodiimidodicarbonimidic acids, thioimidotricarbonimidic acids, thioimidotetracarbonimidic acids, and derivatives thereof (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioimidodicarbonimidic acid, thiodiimidodicarbonimidic acid, thioimidotricarbonimidic acid, thioimidotetracarbonimidic acid; O-methylthioimidodicarbonimidic acid; O-ethylthioimidodicarbonimidic acid; O-isopropylthioimidodicarbonimidic acid; O-phenylthioimidodicarbonimidic acid; O-benzylthioimidodicarbonimidic acid; O-cyclohexylthioimidodicarbonimidic acid; O-naphthylthioimidodicarbonimidic acid; O-norbornylthioimidodicarbonimidic acid; O-adamantylthioimidodicarbonimidic acid; O,O′-dimethylthioimidodicarbonimidic acid; O,O′-diethylthioimidodicarbonimidic acid; O,O′-diisopropylthioimidodicarbonimidic acid; O,O′-diphenylthioimidodicarbonimidic acid; O,O′-dibenzylthioimidodicarbonimidic acid; O,O′-dicyclohexylthioimidodicarbonimidic acid; O,O′-dinaphthylthioimidodicarbonimidic acid; O,O′-dinorbornylthioimidodicarbonimidic acid; and O,O′-diadamantylthioimidodicarbonimidic acid.

N Valence Stabilizer #26: Examples of diimidoylimines, diimidoylhydrazides, bis(diimidoylimines), bis(diimidoylhydrazides), poly(diimidoylimines), and poly(diimidoylhydrazides) (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diacetimidoylimine; dibenzimidoylimine; and dicyclohexylimidoylimine.

N Valence Stabilizer #27: Examples of imidosulfamides, diimidosulfamides, bis(imidosulfamides), bis(diimidosulfamides), poly(imidosulfamides), and poly(diimidosulfamides) (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidosulfamidic acid, diimidosulfamidic acid; O-phenylimidosulfamide; O-benzylimidosulfamide; N-phenylimidosulfamide; N-benzylimidosulfamide; O-phenyldiimidosulfamide; O-benzyldiimidosulfamide; N-phenyldiimidosulfamide; and N-benzyldiimidosulfamide.

N Valence Stabilizer #28: Examples of phosphoramidimidic triamides, bis(phosphoramidimidic triamides), and poly(phosphoramidimidic triamides) and derivatives thereof (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidimidic triamide; N-phenylphosphoramidimidic triamide; N-benzylphosphoramidimidic triamide; N-naphthylphosphoramidimidic triamide; N-cyclohexylphosphoramidimidic triamide; N-norbornylphosphoramidimidic triamide; N,N′-diphenylphosphoramidimidic triamide; N,N′-dibenzylphosphoramidimidic triamide; N,N′-dinaphthylphosphoramidimidic triamide; N,N′-dicyclohexylphosphoramidimidic triamide; and N,N′-dinorbornylphosphoramidimidic triamide.

N Valence Stabilizer #29: Examples of phosphoramidimidic acid, phosphorodiamidimidic acid, bis(phosphoramidimidic acid), bis(phosphorodiamidimidic acid), poly(phosphoramidimidic acid), poly(phosphorodiamidimidic acid), and derivatives thereof (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidimidic acid, phosphorodiamidimidic acid, O-phenylphosphoramidimidic acid; O-benzylphosphoramidimidic acid; O-naphthylphosphoramidimidic acid; O-cyclohexylphosphoramidimidic acid; O-norbornylphosphoramidimidic acid; O,O′-diphenylphosphoramidimidic acid; O,O′-dibenzylphosphoramidimidic acid; O,O′-dinaphthylphosphoramidimidic acid; O,O′-dicyclohexylphosphoramidimidic acid; and O,O′-dinorbornylphosphoramidimidic acid.

N Valence Stabilizer #30: Examples of phosphoramidimidodithioic acid, phosphorodiamidimidothioic acid, bis(phosphoramidimidodithioic acid), bis(phosphorodiamidimidothioic acid), poly(phosphoramidimidodithioic acid), poly(phosphorodiamidimidothioic acid), and derivatives thereof (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidimidodithioic acid, phosphorodiamidimidothioic acid, S-phenylphosphoramidimidodithioic acid; S-benzylphosphoramidimidodithoic acid; S-naphthylphosphoramidimidodithioic acid; S-cyclohexylphosphoramidimidodithioic acid; S-norbornylphosphoramidimidodithioic acid; S,S′-diphenylphosphoramidimidodithioic acid; S,S′-dibenzylphosphoramidimidodithioic acid; S,S′-dinaphthylphosphoramidimidodithioic acid; S,S′-dicyclohexylphosphoramidimidodithioic acid; and S,S′-dinorbornylphosphoramidimidodithioic acid.

N Valence Stabilizer #31: Examples of azo compounds with amino, imino, oximo, diazeno, or hydrazido substitution at the ortho- (for aryl) or alpha- or beta- (for alkyl) positions, bis[o-(H2N—) or alpha- or beta-(H2N-)azo compounds], or poly[o-(H2N—) or alpha- or beta-(H2N-)azo compounds) (N—N Bidentates, N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: o-aminoazobenzene; o,o′-diaminoazobenzene; (2-pyridine)azobenzene; 1-phenylazo-2-naphthylamine; pyridineazo-2-naphthol (PAN); pyridineazoresorcinol (PAR); o-hydroxy-o′-(beta-aminoethylamino)azobenzene; Benzopurpurin 4B; Congo Red; Fat Brown RR; benzopurpurin; Congo Red; Direct Red 75; Mordant Brown 48; Nitro Red; 2-imidazolylazobenzene; 2-benzimidazolylazobenzene; 3-pyrazolylazobenzene; 3-(1,2,4-triazolyl)azobenzene; 2-pyridylazobenzene; 2-pyrazinylazobenzene; and 2-pyrimidinylazobenzene.

N Valence Stabilizer #32: Examples of diazeneformimidamides (diazeneamidines), diazeneacetimidamides (diazene-alpha-amidinoalkanes(alkenes)), bis(diazeneformimidamides), bis(diazeneacetimidamides), poly(diazeneformimidamides), and poly(diazeneacetimidamides) (N—N Bidentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformimidamide (diazeneamidine); diazeneacetimidamide (diazene-alpha-amidinomethane); phenyldiazeneformimidamide; triphenyldiazeneformimidamide; phenyldiazeneacetimidamide; and triphenyldiazeneacetimidamide.

N Valence Stabilizer #33: Examples of diazeneformimidic acid, diazeneacetimidic acid, bis(diazeneformimidic acid), bis(diazeneacetimidic acid), poly(diazeneformimidic acid), poly(diazeneacetimidic acid), and derivatives thereof (N—N Bidentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformimidic acid, diazeneacetimidic acid, phenyldiazeneformimidic acid, diphenyldiazeneformimidic acid, phenyldiazeneacetimidic acid, and diphenyldiazeneacetimidic acid.

N Valence Stabilizer #34: Examples of diazeneformimidothioic acid, diazeneacetimidothioic acid, bis(diazeneformimidothioic acid), bis(diazeneacetimidothioic acid), poly(diazeneformimidothioic acid), poly(diazeneacetimidothioic acid), and derivatives thereof (N—N Bidentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformimidothioic acid, diazeneacetimidothioic acid, phenyldiazeneformimidothioic acid, diphenyldiazeneformimidothioic acid, phenyldiazeneacetimidothioic acid, and diphenyldiazeneacetimidothioic acid.

N Valence Stabilizer #35: Examples of imidoyldiazenes, bis(imidoyldiazenes), and poly(imidoyldiazenes), (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetimidoyldiazene; benzimidoyldiazene; and cyclohexylimidoyldiazene.

N Valence Stabilizer #36: Examples of diazenediformimidamides (1,2-diazenediamidines), diazenediacetimidamides (1,2-diazene-di-alpha-amidinoalkanes(alkenes)), bis(diazenediformimidamides), bis(diazenediacetimidamides), poly(diazenediformimidamides), and poly(diazenediacetimidamides) (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformimidamide (1,2-diazenediamidine), diazenediacetimidamide (1,2-diazene-di-alpha-amidinomethane); diphenyldiazenediformimidamide; tetraphenyldiazenediformimidamide; diphenyldiazenediacetimidamide; and tetraphenyldiazenediacetimidamide.

N Valence Stabilizer #37: Examples of diazenediformimidic acid, diazenediacetimidic acid, bis(diazenediformimidic acid), bis(diazenediacetimidic acid), poly(diazenediformimidic acid), and poly(diazenediacetimidic acid), and derivatives thereof (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformimidic acid, diazenediacetimidic acid, diphenyldiazenediformimidic acid, and diphenyldiazenediacetimidic acid.

N Valence Stabilizer #38: Examples of diazenediformimidothioic acid, diazenediacetimidothioic acid, bis(diazenediformimidothioic acid), bis(diazenediacetimidothioic acid), poly(diazenediformimidothioic acid), and poly(diazenediacetimidothioic acid), and derivatives thereof (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformimidothioic acid, diazenediacetimidothioic acid, diphenyldiazenediformimidothioic acid, and diphenyldiazenediacetimidothioic acid.

N Valence Stabilizer #39: Examples of diimidoyldiazenes, bis(diimidoyldiazenes), and poly(diimidoyldiazenes), (N—N Tridentates and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diacetimidoyldiazene; dibenzimidoyldiazene; and dicyclohexylimidoyldiazene.

N Valence Stabilizer #40: Examples of ortho-amino (or -hydrazido) substituted formazans, bis(o-amino or -hydrazido substituted formazans), and poly(o-amino or -hydrazido substituted formazans) (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1-(2-aminophenyl)-3,5-diphenylformazan; and 1,5-bis(2-aminophenyl)-3-phenylformazan.

N Valence Stabilizer #41: Examples of ortho-amino (or -hydrazido) substituted azines (including ketazines), bis(o-amino or hydrazido substituted azines), and poly(o-amino or hydrazido substituted azines) (N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-amino-1-benzalazine; 2-amino-1-naphthalazine; and 2-amino-1-cyclohexanonazine.

N Valence Stabilizer #42: Examples of Schiff Bases with one Imine (C═N) Group and with ortho- or alpha- or beta-amino or imino or oximo or diazeno or hydrazido substitution (N—N Bidentates, N—N Tridentates, N—N Tetradentates, N—N Pentadentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-(2-Aminobenzaldehydo)isopropylamine; N-(2-Pyridinecarboxaldehydo)isopropylamine; N-(2-Pyrrolecarboxaldehydo)isopropylamine; N-(2-Acetylpyridino)isopropylamine; N-(2-Acetylpyrrolo)isopropylamine; N-(2-Aminoacetophenono)isopropylamine; N-(2-Aminobenzaldehydo)cyclohexylamine; N-(2-Pyridinecarboxaldehydo)cyclohexylamine; N-(2-Pyrrolecarboxaldehydo)cyclohexylamine; N-(2-Acetylpyridino)cyclohexylamine; N-(2-Acetylpyrrolo)cyclohexylamine; N-(2-Aminoacetophenono)cyclohexylamine; N-(2-Aminobenzaldehydo)aniline; N-(2-Pyridinecarboxaldehydo)aniline; N-(2-Pyrrolecarboxaldehydo)aniline; N-(2-Acetylpyridino)aniline; N-(2-Acetylpyrrolo)aniline; N-(2-Aminoacetophenono)aniline; N-(2-Aminobenzaldehydo)aminonorbornane; N-(2-Pyridinecarboxaldehydo)aminonorbornane; N-(2-Pyrrolecarboxaldehydo)aminonorbornane; N-(2-Acetylpyridino)aminonorbornane; N-(2-Acetylpyrrolo)aminonorbornane; N-(2-Aminoacetophenono)aminonorbornane; 2-pyrrolecarboxaldehyde phenylhydrazone; 2-pyrrolecarboxaldehyde 2-pyridyl hydrazone; 2-aminobenzaldehyde phenylhydrazone (nitrin); and 2-aminobenzaldehyde 2-pyridyl hydrazone. Also includes hydrazones with ortho-N substitution.

N Valence Stabilizer #43: Examples of Schiff Bases with two Imine (C═N) Groups and without ortho- (for aryl constituents) or alpha- or beta- (for alkyl constituents) hydroxy, carboxy, carbonyl, thiol, mercapto, thiocarbonyl, amino, imino, oximo, diazeno, or hydrazido substitution (N—N Bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-(Glyoxalo)diisopropylamine; N,N′-(Glyoxalo)dicyclohexylamine; N,N′-(Glyoxalo)dianiline; N,N′-(Glyoxalo)di-aminonorbornane; N,N′-(Malondialdehydo)diisopropylamine; N,N′-(Malondialdehydo)dicyclohexylamine; N,N′-(Malondialdehydo)dianiline; N,N′-(Malondialdehydo)di-aminonorbornane; N,N′-(Phthalicdialdehydo)diisopropylamine; N,N′-(Phthalicdialdehydo)dicyclohexylamine; N,N′-(Phthalicdialdehydo)dianiline; N,N′-(Phthalicdialdehydo)di-aminonorbornane; N,N′-(Formylcamphoro)diisopropylamine; N,N′-(Formylcamphoro)dicyclohexylamine; N,N′-(Formylcamphoro)dianiline; N,N′-(Formylcamphoro)di-aminonorbornane; N,N′-(Acetylacetonato)diisopropylamine; N,N′-(Acetylacetonato)dicyclohexylamine; N,N′-(Acetylacetonato)dianiline; N,N′-(Acetylacetonato)di-aminonorbornane; N,N′-(Diacetylbenzeno)diisopropylamine; N,N′-(Diacetylbenzeno)dicyclohexylamine; N,N′-(Diacetylbenzeno)dianiline; N,N′-(Diacetylbenzeno)di-aminonorbornane; N,N′-(1,2-Cyclohexanono)diisopropylamine; N,N′-(1,2-Cyclohexanono)dicyclohexylamine; N,N′-(1,2-Cyclohexanono)dianiline; N,N′-(1,2-Cyclohexanono)di-aminonorbornane; N,N′-(Camphorquinono)diisopropylamine; N,N′-(Camphorquinono)dicyclohexylamine; N,N′-(Camphorquinono)dianiline; N,N′-(Camphorquinono)di-aminonorbornane; N,N′-(Benzaldehydo)ethylenediamine; N,N′-(Naphthaldehydo)ethylenediamine; N,N′-(Acetophenono)ethylenediamine; N,N′-(Benzaldehydo)trimethylenediamine; N,N′-(Naphthaldehydo)trimethylenediamine; N,N′-(Acetophenono)trimethylenediamine; N,N′-(Benzaldehydo)cyclohexane-1,2-diamine; N,N′-(Naphthaldehydo)cyclohexane-1,2-diamine; N,N′-(Acetophenono)cyclohexane-1,2-diamine; N,N′-(Benzaldehydo)-1,2-diaminobenzene; N,N′-(Naphthaldehydo)-1,2-diaminobenzene; N,N′-(Acetophenono)-1,2-diaminobenzene; N,N′-(Acetylacetonato)ethylenediamine; N,N′-(Acetylacetonato)-1,2-cyclohexylenediamine; N,N′-(Acetylacetonato)-1,2-propylenediamine; N,N′-(Glyoxalo)-o-phenylenediamine; and N,N′-(Glyoxalo)ethylenediamine. Also includes dihydrazones.

N Valence Stabilizer #44: Examples of Schiff Bases with two Imine (C═N) Groups and with ortho- or alpha- or beta-amino or imino or oximo or diazeno or hydrazido substitution (N—N Bidentates, N—N Tridentates, N—N Tetradentates, N—N Pentadentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-(2,6-Pyridinedicarboxaldehydo)diisopropylamine; N,N′-(2,6-Pyridinedicarboxaldehydo)dicyclohexylamine; N,N′-(2,6-Pyridinedicarboxaldehydo)dianiline; N,N′-(2,6-Pyridinedicarboxaldehydo)di-aminonorbornane; N,N′-(2,5-Pyrroledicarboxaldehydo)diisopropylamine; N,N′-(2,5-Pyrroledicarboxaldehydo)dicyclohexylamine; N,N′-(2,5-Pyrroledicarboxaldehydo)dianiline; N,N′-(2,5-Pyrroledicarboxaldehydo)di-aminonorbornane; N,N′-(o-Aminophthalicdialdehydo)diisopropylamine; N,N′-(o-Aminophthalicdialdehydo)dicyclohexylamine; N,N′-(o-Aminophthalicdialdehydo)dianiline; N,N′-(o-Aminophthalicdialdehydo)di-aminonorbornane; N,N′-(o-Aminoformylcamphoro)diisopropylamine; N,N′-(o-Aminoformylcamphoro)dicyclohexylamine; N,N′-(o-Aminoformylcamphoro)dianiline; N,N′-(o-Aminoformylcamphoro)di-aminonorbornane; N,N′-(2,6-Diacetylpyridino)diisopropylamine; N,N′-(2,6-Diacetylpyridino)dicyclohexylamine; N,N′-(2,6-Diacetylpyridino)dianiline; N,N′-(2,6-Diacetylpyridino)di-aminonorbornane; N,N′-(o-Aminodiacetylbenzeno)diisopropylamine; N,N′-(o-Aminodiacetylbenzeno)dicyclohexylamine; N,N′-(o-Aminodiacetylbenzeno)dianiline; N,N′-(o-Aminodiacetylbenzeno)di-aminonorbornane; N,N′-(3,6-Diamino-1,2-cyclohexanono)diisopropylamine; N,N′-(3,6-Diamino-1,2-cyclohexanono)dicyclohexylamine; N,N′-(3,6-Diamino-1,2-cyclohexanono)dianiline; N,N′-(3,6-Diamino-1,2-cyclohexanono)di-aminonorbornane; N,N′-(2,5-Diacetylpyrrolo)diisopropylamine; N,N′-(2,5-Diacetylpyrrolo)dicyclohexylamine; N,N′-(2,5-Diacetylpyrrolo)dianiline; N,N′-(2,5-Diacetylpyrrolo)di-aminonorbornane; N,N′-(o-Aminobenzaldehydo)ethylenediamine; N,N′-(o-Aminonaphthaldehydo)ethylenediamine; N,N′-(o-Aminoacetophenono)ethylenediamine; N,N′-(o-Aminobenzaldehydo)trimethylenediamine; N,N′-(o-Aminonaphthaldehydo)trimethylenediamine; N,N′-(o-Aminoacetophenono)trimethylenediamine; N,N′-(o-Aminobenzaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Aminonaphthaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Aminoacetophenono)cyclohexane-1,2-diamine; N,N′-(o-Aminobenzaldehydo)-1,2-diaminobenzene; N,N′-(o-Aminonaphthaldehydo)-1,2-diaminobenzene; and N,N′-(o-Aminoacetophenono)-1,2-diaminobenzene. Also includes hydrazones with ortho-N substitution.

N Valence Stabilizer #45: Examples of Schiff Bases with three Imine (C═N) Groups and without ortho- (for aryl constituents) or alpha- or beta- (for alkyl constituents) hydroxy, carboxy, carbonyl, thiol, mercapto, thiocarbonyl, amino, imino, oximo, diazeno, or hydrazido substitution (N—N Tridentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′,N′′-(Benzaldehydo)tris(2-aminoethyl)amine; N,N′,N′′-(Naphthaldehydo)tris(2-aminoethyl)amine; and N,N′,N′′-(Acetophenono)tris(2-aminoethyl)amine. Also includes trihydrazones.

N Valence Stabilizer #46: Examples of Schiff Bases with three Imine (C═N) Groups and with ortho- or alpha- or beta-amino or imino or oximo or diazeno or hydrazido substitution (N—N Tridentates, N—N Tetradentates, N—N Pentadentates, or N—N Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′,N′′-(o-Aminobenzaldehydo)tris(2-aminoethyl)amine; N,N′,N′′-(o-Aminonaphthaldehydo)tris(2-aminoethyl)amine; and N,N′,N′′-(o-Aminoacetophenono)tris(2-aminoethyl)amine.

S Valence Stabilizer #1: Examples of macrocyclic, macrobicyclic, and macropolycyclic oligothioketones (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of thioketones (especially in the beta position) (S—S Bidentates, S—S Tetradentates, and S—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathioketocyclotetracosane ([24]ane(═S)6); hexathioketocycloheneicosane ([21]ane(═S)6); hexathioketocyclooctadecane ([18]ane(═S)6); hexathioketocyclopentadecane ([15]ane(═S)6); tetrathioketocycloeicosane ([20]ane(═S)4); tetrathioketocyclooctadecane ([18]ane(═S)4); tetrathioketocyclohexadecane ([16]ane(═S)4); tetrathioketocyclotetradecane ([14]ane(═S)4); tetrathioketocyclododecane ([12]ane(═S)4); dithioketocyclohexadecane ([16]ane(═S)2); dithioketocyclotetraadecane ([14]ane(═S)2); dithioketocyclododecane ([12]ane(═S)2); dithioketocyclodecane ([10]ane(═S)2); and dithioketocyclooctane ([8]ane(═S)2).

S Valence Stabilizer #2: Examples of macrocyclic, macrobicyclic, and macropolycyclic dithiolenes (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of alpha-, alpha-dithiolenes (meaning two thiol groups on a single carbon atom in the ring) (S—S Bidentates, S—S Tetradentates, and S—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathiolocyclotetracosane ([24]ane(—SH)6); hexathiolocycloheneicosane ([21]ane(—SH)6); hexathiolocyclooctadecane ([18]ane(—SH)6); hexathiolocyclopentadecane ([15]ane(—SH)6); tetrathiolocycloeicosane ([20]ane(—SH)4); tetrathiolocyclooctadecane ([18]ane(—SH)4); tetrathiolocyclohexadecane ([16]ane(—SH)4); tetrathiolocyclotetradecane ([14]ane(—SH)4); tetrathiolocyclododecane ([12]ane(—SH)4); dithiolocyclohexadecane ([16]ane(—SH)2); dithiolocyclotetraadecane ([14]ane(—SH)2); dithiolocyclododecane ([12]ane(—SH)2); dithiolocyclodecane ([10]ane(—SH)2); and dithiolocyclooctane ([8]ane(—SH)2).

S Valence Stabilizer #3: Examples of dithioimidodialdehydes, dithiohydrazidodialdehydes (thioacyl thiohydrazides), bis(dithioimidodialdehydes), bis(dithiohydrazidodialdehydes), poly(dithioimidodialdehydes), and poly(dithiohydrazidodialdehydes) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiacetamide, dithiodipropanamide, dithiodibutanamide, dithiodibenzamide, and dithiodicyclohexamide.

S Valence Stabilizer #4: Examples of dithioimidodicarbonic acids, dithiohydrazidodicarbonic acids, bis(dithioimidodicarbonic acids), bis(dithiohydrazidodicarbonic acids), poly(dithioimidodicarbonic acids), poly(dithiohydrazidodicarbonic acids) and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioimidodicarbonic acid, dithiohydrazidodicarbonic acid, O-phenyldithioimidodicarbonic acid, O-benzyldithioimidodicarbonic acid, O-cyclohexyldithioimidodicarbonic acid, O-norbornyldithioimidodicarbonic acid, O,O′-diphenyldithioimidodicarbonic acid, O,O′-dibenzyldithioimidodicarbonic acid, O,O′-dicyclohexyldithioimidodicarbonic acid, and O,O′-norbornyldithioimidodicarbonic acid.

S Valence Stabilizer #5: Examples of 1,3-dithioketones (dithio-beta-ketonates), 1,3,5-trithioketones, bis(1,3-dithioketones), and poly(1,3-dithioketones) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexafluoropentanedithione; 1,3-diphenyl-1,3-propanedithione; thiobenzoylthiopinacolone; dithiocyclohexoylmethane; diphenylpentanetrithionate; tetramethylnonanetrithionate; hexafluoroheptanetrithionate; trifluoroheptanetrithionate; 1-(2-thienyl)-1,3-butanedithione, 1-(2-naphthyl)-1,3-butanedithione, trifluorothioacetylthiocamphor; and 1,3-indandithione.

S Valence Stabilizer #6: Examples of 1,2-dithioketones (dithiolenes, dithio-alpha-ketonates), 1,2,3-trithioketones, dithiotropolonates, o-dithioquinones, bis(1,2-dithioketones), and poly(1,2-dithioketones) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiotropolone; 1,2-dithiobenzoquinone (o-dithioquinone)(o-benzenedithiolate)(bdt); di-tert-butyl-1,2-dithiobenzoquinone; hexafluoro-1,2-dithiobenzoquinone; 1,2-dithionaphthoquinone; 9,10-dithiophenanthroquinone; ethylenedithiolene (edt); maleonitriledithiolene (mnt); trifluoromethyldithiolene (tfd); carbomethoxydithiolene (cmt); trithionedithiolene (dmit); toluenedithiolate (tdt); dithiomanaldehyde (propenethionethiolate)(ptt); dithioacetylacetonate (SacSac); dijulolidinedithiolene; 2,3-piperazinedithiolate; di(4-aminophenyl)dithiolene; dimercaptoisotrithione (dmit); (4-octylphenyl)dithiolene; benzenetetrathiol; tetrathiosquaric acid; trithiodeltic acid; pentathiocroconic acid; dithiocroconic acid; hexathiorhodizonic acid; dithiorhodizonic acid; ethylenetetrathiol; trans-butadienetetrathiolate; tetrathiooxalic acid; 1,2-indandithione; naphthothioquinone; acenapthenethioquinone; aceanthrenethioquinone; and indole-2,3-dithione (thioisatin).

S Valence Stabilizer #7: Examples of dithiomalonamides (dithiomalonodiamides), bis(dithiomalonamides), and polydithiomalonamides (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiomalonamide, N-phenyldithiomalonamide, N-benzyldithiomalonamide, N-pentafluorophenyldithiomalonamide, N-cyclohexyldithiomalonamide, N-norbornyldithiomalonamide, N,N′-diphenyldithiomalonamide, N,N′-dibenzyldithiomalonamide, N,N′-dipentafluorophenyldithiomalonamide, N,N′-dicyclohexyldithiomalonamide, and N,N′-norbornyldithiomalonamide.

S Valence Stabilizer #8: Examples of 2-thioacylthioacetamides, bis(2-thioacylthioacetamides), and poly(2-thioacylthioacetamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-thioacetothioacetamide, N-phenyl-2-thioacetothioacetamide, N-pentafluorophenyl-2-thioacetothioacetamide, N-benzyl-2-thioacetothioacetamide, N-cyclohexyl-2-thioacetothioacetamide, N-norbornyl-2-thioacetothioacetamide, N-phenyl-2-thiobenzothioacetamide, N-pentafluorophenyl-2-pentafluorothiobenzothioacetamide, and N-cyclohexyl-2-thiocyclohexothioacetamide.

S Valence Stabilizer #9: Examples of dithioacyl sulfides, bis(dithioacyl sulfides), and poly(dithioacyl sulfides), (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioacetyl sulfide; dithiopropanoyl sulfide; dithiobenzoyl sulfide; and dithiopentafluorobenzoyl sulfide.

S Valence Stabilizer #10: Examples of trithiodicarbonic diamides, bis(trithiodicarbonic diamides), and poly(trithiodicarbonic diamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithiodicarbonic diamide; N-phenyltrithiodicarbonic diamide; N-pentafluorophenyltrithiodicarbonic diamide; N-benzyltrithiodicarbonic diamide; N-cyclohexyltrithiodicarbonic diamide; N-norbornyltrithiodicarbonic diamide; N,N′-diphenyltrithiodicarbonic diamide; N,N′-dipentafluorophenyltrithiodicarbonic diamide; N,N′-dibenzyltrithiodicarbonic diamide; N,N′-dicyclohexyltrithiodicarbonic diamide; and N,N′-dinorbornyltrithiodicarbonic diamide.

S Valence Stabilizer #11: Examples of pentathio-, tetrathio-, or trithiodicarbonic acids, bis(pentathio-, tetrathio-, or trithiodicarbonic acids), poly(pentathio-, tetrathio-, or trithiodicarbonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentathiodicarbonic acid, tetrathiodicarbonic acid, trithiodicarbonic acid, O-phenyltrithiodicarbonic acid, O-benzyltrithiodicarbonic acid, O-cyclohexyltrithiodicarbonic acid, O-norbornyltrithiodicarbonic acid, O,O′-diphenyltrithiodicarbonic acid, O,O′-dibenzyltrithiodicarbonic acid, O,O′-dicyclohexyltrithiodicarbonic acid, and O,O′-dinorbornyltrithiodicarbonic acid.

S Valence Stabilizer #12: Examples of dithiohypophosphoric acids, bis(dithiohypophosphoric acids), poly(dithiohypophosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiohypophosphoric acid, methyldithiohypophosphoric acid, isopropyldithiohypophosphoric acid, tert-butyldithiohypophosphoric acid, phenyldithiohypophosphoric acid, pentafluorophenyldithiohypophosphoric acid, benzyldithiohypophosphoric acid, cyclohexyldithiohypophosphoric acid, norbornyldithiohypophosphoric acid, dimethyldithiohypophosphoric acid, diisopropyldiothiohypophosphoric acid, di-tert-butyldithiohypophosphoric acid, diphenyldithiohypophosphoric acid, di-pentafluorophenyldithiohypophosphoric acid, dibenzyldithiohypophosphoric acid, dicyclohexyldithiohypophosphoric acid, and dinorbornyldithiohypophosphoric acid.

S Valence Stabilizer #13: Examples of dithiohypophosphoramides, bis(dithiohypophosphoramides), and poly(dithiohypophosphoramides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiohypophosphoramide, N-methyldithiohypophosphoramide, N-isopropyldithiohypophosphoramide, N-tert-butyldithiohypophosphoramide, N-phenyldithiohypophosphoramide, N-pentafluorophenyldithiohypophosphoramide, N-benzyldithiohypophosphoramide, N-cyclohexyldithiohypophosphoramide, N-norbornyldithiohypophosphoramide, N,N′′′-dimethyldithiohypophosphoramide, N,N′′′-diisopropyldithiohypophosphoramide, N,N′′′-di-tert-butyldithiohypophosphoramide, N,N′′′-diphenyldithiohypophosphoramide, N,N′′′-di-pentafluorophenyldithiohypophosphoramide, N,N′′′-dibenzyldithiohypophosphoramide, N,N′′′-dicyclohexyldithiohypophosphoramide, and N,N′′′-dinorbornyldithiohypophosphoramide.
S Valence Stabilizer #14: Examples of dithioimidodiphosphoric acids, dithiohydrazidodiphosphoric acids, bis(dithioimidodiphosphoric acids), bis(dithiohydrazidodiphosphoric acids), poly(dithioimidodiphosphoric acids), poly(dithiohydrazidodiphosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioimidodiphosphoric acid, methyldithioimidodiphosphoric acid, isopropyldithioimidodiphosphoric acid, tert-butyldithioimidodiphosphoric acid, phenyldithioimidodiphosphoric acid, pentafluorophenyldithioimidodiphosphoric acid, benzyldithioimidodiphosphoric acid, cyclohexyldithioimidodiphosphoric acid, norbornyldithioimidodiphosphoric acid, dimethyldithioimidodiphosphoric acid, diisopropyldiothioimidodiphosphoric acid, di-tert-butyldithioimidodiphosphoric acid, diphenyldithioimidodiphosphoric acid, di-pentafluorophenyldithioimidodiphosphoric acid, dibenzyldithioimidodiphosphoric acid, dicyclohexyldithioimidodiphosphoric acid, and dinorbornyldithioimidodiphosphoric acid.

S Valence Stabilizer #15: Examples of dithioimidodiphosphoramides, dithiohydrazidodiphosphoramides, bis(dithioimidodiphosphoramides), bis(dithiohydrazidodiphosphoramides), poly(dithioimidodiphosphoramides), and poly(dithiohydrazidodiphosphoramides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioimidodiphosphoramide, N-methyldithioimidodiphosphoramide, N-isopropyldithioimidodiphosphoramide, N-tert-butyldithioimidodiphosphoramide, N-phenyldithioimidodiphosphoramide, N-pentafluorophenyldithioimidodiphosphoramide, N-benzyldithioimidodiphosphoramide, N-cyclohexyldithioimidodiphosphoramide, N-norbornyldithioimidodiphosphoramide, N,N′′′-dimethyldithioimidodiphosphoramide, N,N′′′-diisopropyldithioimidodiphosphoramide, N,N′′′-di-tert-butyldithioimidodiphosphoramide, N,N′′′-diphenyldithioimidodiphosphoramide, N,N′′′-di-pentafluorophenyldithioimidodiphosphoramide, N,N′′′-dibenzyldithioimidodiphosphoramide, N,N′′′-dicyclohexyldithioimidodiphosphoramide, and N,N′′′-dinorbornyldithioimidodiphosphoramide.

S Valence Stabilizer #16: Examples of dithiodiphosphoramides, bis(dithiodiphosphoramides), and poly(dithiodiphosphoramides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphoramide, N-methyldithiodiphosphoramide, N-isopropyldithiodiphosphoramide, N-tert-butyldithiodiphosphoramide, N-phenyldithiodiphosphoramide, N-pentafluorophenyldithiodiphosphoramide, N-benzyldithiodiphosphoramide, N-cyclohexyldithiodiphosphoramide, N-norbornyldithiodiphosphoramide, N,N′′′-dimethyldithiodiphosphoramide, N,N′′′-diisopropyldithiodiphosphoramide, N,N′′′-di-tert-butyldithiodiphosphoramide, N,N′′′-diphenyldithiodiphosphoramide, N,N′′′-di-pentafluorophenyldithiodiphosphoramide, N,N′′′-dibenzyldithiodiphosphoramide, N,N′′′-dicyclohexyldithiodiphosphoramide, and N,N′′′-dinorbornyldithiodiphosphoramide.

S Valence Stabilizer #17: Examples of dithiodiphosphoric acids, bis(dithiodiphosphoric acids), poly(dithiodiphosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphoric acid, methyldithiodiphosphoric acid, isopropyldithiodiphosphoric acid, tert-butyldithiodiphosphoric acid, phenyldithiodiphosphoric acid, pentafluorophenyldithiodiphosphoric acid, benzyldithiodiphosphoric acid, cyclohexyldithiodiphosphoric acid, norbornyldithiodiphosphoric acid, dimethyldithiodiphosphoric acid, diisopropyldiothiodiphosphoric acid, di-tert-butyldithiodiphosphoric acid, diphenyldithiodiphosphoric acid, di-pentafluorophenyldithiodiphosphoric acid, dibenzyldithiodiphosphoric acid, dicyclohexyldithiodiphosphoric acid, and dinorbornyldithiodiphosphoric acid.

S Valence Stabilizer #18: Examples of trithiophosphoric acids (phosphorotrithioic acids), bis(trithiophosphoric acids), poly(trithiophosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithiophosphoric acid, O-phenyltrithiophosphoric acid, O-benzyltrithiophosphoric acid, O-cyclohexyltrithiophosphoric acid, O-norbornyltrithiophosphoric acid, O,S-diphenyltrithiophosphoric acid, O,S-dibenzyltrithiophosphoric acid, O,S-dicyclohexyltrithiophosphoric acid, and O,S-dinorbornyltrithiophosphoric acid.

S Valence Stabilizer #19: Examples of dithiophosphoric acids (phosphorodithioic acids), bis(dithiophosphoric acids), poly(dithiophosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiophosphoric acid, O-phenyldithiophosphoric acid, O-benzyldithiophosphoric acid, O-cyclohexyldithiophosphoric acid, O-norbornyldithiophosphoric acid, O,O-diphenyldithiophosphoric acid, O,O-dibenzyldithiophosphoric acid, O,O-dicyclohexyldithiophosphoric acid, and O,O-dinorbornyldithiophosphoric acid.

S Valence Stabilizer #20: Examples of tetrathiophosphoric acids (phosphorotetrathioic acids), bis(tetrathiophosphoric acids), poly(tetrathiophosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrathiophosphoric acid, S-phenyltetrathiophosphoric acid, S-benzyltetrathiophosphoric acid, S-cyclohexyltetrathiophosphoric acid, S-norbornyltetrathiophosphoric acid, S,S-diphenyltetrathiophosphoric acid, S,S-dibenzyltetrathiophosphoric acid, S,S-dicyclohexyltetrathiophosphoric acid, and S,S-dinorbornyltetrathiophosphoric acid.

S Valence Stabilizer #21: Examples of phosphoro(dithioperoxo)dithioic acids, bis[phosphoro(dithioperoxo)dithioic acids], poly[phosphoro(dithioperoxo)dithioic acids], and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoro(dithioperoxo)dithioic acid, O-phenylphosphoro(dithioperoxo)dithioic acid, O-benzylphosphoro(dithioperoxo)dithioic acid, O-cyclohexylphosphoro(dithioperoxo)dithioic acid, O-norbornylphosphoro(dithioperoxo)dithioic acid, O,S-diphenylphosphoro(dithioperoxo)dithioic acid, O,S-dibenzylphosphoro(dithioperoxo)dithioic acid, O,S-dicyclohexylphosphoro(dithioperoxo)dithioic acid, and O,S-dinorbornylphosphoro(dithioperoxo)dithioic acid.

S Valence Stabilizer #22: Examples of phosphoro(dithioperoxo)thioic acids, bis[phosphoro(dithioperoxo)thioic acids], poly[phosphoro(dithioperoxo)thioic acids], and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoro(dithioperoxo)thioic acid, O-phenylphosphoro(dithioperoxo)thioic acid, O-benzylphosphoro(dithioperoxo)thioic acid, O-cyclohexylphosphoro(dithioperoxo)thioic acid, O-norbornylphosphoro(dithioperoxo)thioic acid, O,S-diphenylphosphoro(dithioperoxo)thioic acid, O,S-dibenzylphosphoro(dithioperoxo)thioic acid, O,S-dicyclohexylphosphoro(dithioperoxo)thioic acid, and O,S-dinorbornylphosphoro(dithioperoxo)thioic acid.

S Valence Stabilizer #23: Examples of phosphoro(dithioperoxo)trithioic acids, bis[phosphoro(dithioperoxo)trithioic acids], poly[phosphoro(dithioperoxo)trithioic acids], and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoro(dithioperoxo)trithioic acid, O-phenylphosphoro(dithioperoxo)trithioic acid, O-benzylphosphoro(dithioperoxo)trithioic acid, O-cyclohexylphosphoro(dithioperoxo)trithioic acid, O-norbornylphosphoro(dithioperoxo)trithioic acid, O,S-diphenylphosphoro(dithioperoxo)trithioic acid, O,S-dibenzylphosphoro(dithioperoxo)trithioic acid, O,S-dicyclohexylphosphoro(dithioperoxo)trithioic acid, and O,S-dinorbornylphosphoro(dithioperoxo)trithioic acid.

S Valence Stabilizer #24: Examples of beta-mercaptothioketones, beta-mercaptothioaldehydes, bis(beta-mercaptothioketones), bis(beta-mercaptothioaldehydes), poly(beta-mercaptothioketones), and poly(beta-mercaptothioaldehydes) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-mercaptopentan-2-thione; 1,3-diphenyl-3-mercaptopropanethioaldehyde; 1,3-dibenzyl-3-mercaptopropanethioaldehyde; 1,3-dicyclohexyl-3-mercaptopropanethioaldehyde; 1,3-dinorbornyl-3-mercaptopropanethioaldehyde; 1,3-di(2-thienyl)-3-mercaptopropanethioaldehyde; 1,3-di(2-furyl)-3-mercaptopropanethioaldehyde; o-mercaptothioacetophenone; 5-mercapto-1,4-dithionaphthoquinone; 1-mercaptothioacridone; 1-mercaptodithioanthraquinone; 1,8-dimercaptodithioanthraquinone; and beta-mercaptothiobenzophenone.

S Valence Stabilizer #25: Examples of N-(aminomethylthiol)thioureas[N-(aminomercaptomethyl)thioureas], bis[N-(aminomethylthiol)thioureas], and poly[N-(aminomethylthiol)thioureas] (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N′-(aminomercaptomethyl)thiourea; N,N′′-dimethyl-N′-(aminomercaptomethyl)thiourea; N,N′-diethyl-N′-(aminomercaptomethyl)thiourea; N,N′′-isopropyl-N′-(aminomercaptomethyl)thiourea; N,N′′-diphenyl-N′-(aminomercaptomethyl)thiourea; N,N′′-dibenzyl-N′-(aminonercaptomethyl)thiourea; N,N′′-dicyclohexyl-N′-(aminomercaptomethyl)thiourea; and N,N′′-dinorbornyl-N′-(aminomercaptomethyl)thiourea.

S Valence Stabilizer #26: Examples of dithiooxamides, bis(dithiooxamides), and poly(dithiooxamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiooxamide (rubeanic acid), N-methyldithiooxamide; N-ethyldithiooxamide; N-isopropyldithiooxamide; N-phenyldithiooxamide; N-benzyldithiooxamide; N-cyclohexyldithiooxamide; N-norbornyldithiooxamide; N,N′-dimethyldithiooxamide; N,N′-diethyldithiooxamide; N,N′-diisopropyldithiooxamide; N,N′-diphenyldithiooxamide; N,N′-dibenzyldithiooxamide; N,N′-dicyclohexyldithiooxamide; and N,N′-dinorbornyldithiooxamide.

S Valence Stabilizer #27: Examples of 1,1-dithiolates, bis(1,1-dithiolates), and poly(1,1-dithiolates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,1-dicyano-2,2-ethylene dithiolate (i-mnt); 1,1-dicarboalkoxy-2,2-ethylene dithiolate (DED); 1,1-di(trifluoromethyl)-2,2-ethylene dithiolate; 1,1-di(pentafluorophenyl)-2,2-ethylene dithiolate; 1-pentamethylene-2,2-ethylene dithiolate; and 1-nitroethylene dithiolate.

S Valence Stabilizer #28: Examples of dithiomonocarboxylic acids, tri- and tetrathiodicarboxylic Acids, bis(dithiomonocarboxylic acids), bis(tri- and tetrathiodicarboxylic acids), poly(dithiomonocarboxylic acids), poly(tri- and tetrathiodicarboxylic acids), and derivatives thereof (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioacetic acid; dithiopropionic acid; dithiobenzoic acid (dtb); dithiophenylacetic acid (dtpa); dithiocyclohexanoic acid; dithiofuroic acid; dithionaphthoic acid; phenyl dithioacetate; phenyl dithiopropionate; phenyl dithiobenzoate; phenyl dithiocyclohexanoate; phenyl dithiofuroate; phenyl dithionaphthoate; tetrathiooxalic acid; tetrathiomalonic acid; tetrathiosuccinic acid; trithiooxalic acid; trithiomalonic acid; trithiosuccinic acid; diphenyl tetrathiooxalate; diphenyl tetrathiomalonate; diphenyl tetrathiosuccinate; diphenyl trithiooxalate; diphenyl trithiomalonate; diphenyl trithiosuccinate; pyridine dithiocarboxylic acid; pyrrole dithiocarboxylic acid; thiophene dithiocarboxylic acid; dithionaphthoic acid; and tetrathiocamphonic acid.

S Valence Stabilizer #29: Examples of perthiomonocarboxylic acids, perthiodicarboxylic acids, bis(perthiomonocarboxylic acids), bis(perthiodicarboxylic acids), poly(perthiomonocarboxylic acids), poly(perthiodicarboxylic acids), and derivatives thereof (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: perthioacetic acid; perthiopropionic acid; perthiobenzoic acid; perthiophenylacetic acid; perthiocyclohexanoic acid; perthiofuroic acid; perthionaphthoic acid; phenyl perthioacetate; phenyl perthiopropionate; phenyl perthiobenzoate; phenyl perthiocyclohexanoate; phenyl perthiofuroate; phenyl perthionaphthoate; perthiooxalic acid; perthiomalonic acid; perthiosuccinic acid; diphenyl perthiooxalate; diphenyl perthiomalonate; diphenyl perthiosuccinate; dithiole-3-thione (dithione-3-thione); and benzodithiole-3-thione (benzodithione-3-thione).

S Valence Stabilizer #30: Examples of dithiocarbonates, trithiocarbonates, perthiocarbonates, bis(dithiocarbonates), bis (trithiocarbonates), and bis (perthiocarbonates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S,S-diethyldithiocarbonate; S,S-diisopropyldithiocarbonate; S,S-diphenyldithiocarbonate; S,S-dibenzyldithiocarbonate; S,S-dicyclohexyldithiocarbonate; S,S-dinorbornyldithiocarbonate; diethyltrithiocarbonate; diisopropyltrithiocarbonate; diphenyltrithiocarbonate; dibenzyltrithiocarbonate; dicyclohexyltrithiocarbonate; and dinorbornyltrithiocarbonate.

S Valence Stabilizer #31: Examples of dithiocarbamates, bis(dithiocarbamates), and poly(dithiocarbamates) (including N-hydroxydithiocarbamates and N-mercaptodithiocarbamates) (S—S Bidentates, S—S Tridentates, and S—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethyldithiocarbamate (dmdtc); di(trifluorodimethyl)dithiocarbamate; diethyldithiocarbamate (dedtc); dipropyldithiocarbamate; diisopropyldithiocarbamate; dibutyldithiocarbamate; ditertbutyldithiocarbamate; dicyanamidodithiocarbamate; azidothioformates; diphenyldithiocarbamate; di(pentafluorophenyl)dithiocarbamate; dibenzyldithiocarbamate; dinaphthyldithiocarbamate; dicyclohexyldithiocarbamate; dinorbornyldithiocarbamate; diadamantyldithiocarbamate; pyrrolidinodithiocarbamate (pyrdtc); piperidinodithiocarbamate (pipdtc); morpholinodithiocarbamate (mordtc); thiamorpholinodithiocarbamate; 3-pyrrolinodithiocarbamate; pyrrolodithiocarbamate; oxazolodithiocarbamate; isoxazolodithiocarbamate; thiazolodithiocarbamate; isothiazolodithiocarbamate; indolodithiocarbamate; carbazolodithiocarbamate; pyrazolinodithiocarbamate; imidazolinodithiocarbamate; pyrazolodithiocarbamate; imidazolodithiocarbamate; indazolodithiocarbamate; and triazolodithiocarbamate.

S Valence Stabilizer #32: Examples of dithiocarbazates (dithiocarbazides), bis(dithiocarbazates), and poly(dithiocarbazates) (S—S Bidentates, S—S Tridentates, and S—S Tetradentates; or possibly N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-dimethyldithiocarbazate; N,N′-di(trifluoromethyl)dithiocarbazate; N,N′-diethyldithiocarbazate; N,N′-diphenyldithiocarbazate; N,N′-dibenzyldithiocarbazate; N,N′-di(pentafluorophenyl)dithiocarbazate; N,N′-dicyclohexyldithiocarbazate; and N,N′-dinorbornyldithiocarbazate.

S Valence Stabilizer #33: Examples of thiocyanate ligands (S monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiocyanate (—SCN).

O Valence Stabilizer #1: Examples of biurets (imidodicarbonic diamides), isobiurets, biureas, triurets, triureas, bis(biurets), bis(isobiurets), bis(biureas), poly(biurets), poly(isobiurets), and poly(biureas) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: biuret, isobiuret, biurea, triuret, triurea, nitrobiuret, dinitrobiuret, aminobiuret, diaminobiuret, oxybiuret, dioxybiuret, cyanobiuret, methylbiuret, ethylbiuret, isopropylbiuret, phenylbiuret, benzylbiuret, cyclohexylbiuret, norbornylbiuret, adamantylbiuret, dimethylbiuret, diethylbiuret, diisopropylbiuret, diphenylbiuret, dibenzylbiuret, dicyclohexylbiuret, dinorbornylbiuret, and diadamantylbiuret.

O Valence Stabilizer #2: Examples of acylureas, aroylureas, bis(acylureas), bis(aroylureas), poly(acylureas), and poly(aroylureas) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: formylurea, acetylurea, benzoylurea, cyclohexoylurea, pentafluorobenzoylurea, N-methylacetylurea, N-phenylbenzoylurea, and N-cyclohexylcyclohexoylurea.

O Valence Stabilizer #3: Examples of imidodialdehydes, hydrazidodialdehydes (acyl hydrazides), bis(imidodialdehydes), bis(hydrazidodialdehydes), poly(imidodialdehydes), and poly(hydrazidodialdehydes) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diacetamide, dipropanamide, dibutanamide, dibenzamide, and dicyclohexamide.

O Valence Stabilizer #4: Examples of imidodicarbonic acids, hydrazidodicarbonic acids, bis(imidodicarbonic acids), bis(hydrazidodicarbonic acids), poly(imidodicarbonic acids), poly(hydrazidodicarbonic acids) and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodicarbonic acid, hydrazidodicarbonic acid, O-phenylimidodicarbonic acid, O-benzylimidodicarbonic acid, O-cyclohexylimidodicarbonic acid, O-norbornylimidodicarbonic acid, O,O′-diphenylimidodicarbonic acid, O,O′-dibenzylimidodicarbonic acid, O,O′-dicyclohexylimidodicarbonic acid, and O,O′-dinorbornylimidodicarbonic acid.

O Valence Stabilizer #5: Examples of imidodisulfamic acid, imidodisulfuric acid, bis(imidodisulfamic acid), bis(imidodisulfuric acid), poly(imidodisulfamic acid), and poly(imidodisulfuric acid) and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodisulfamic acid, imidodisulfuric acid, N-phenylimidodisulfamic acid, N-benzylimidodisulfamic acid, N-cyclohexylimidodisulfamic acid, N-norbornylimidodisulfamic acid, N,N′-diphenylimidodisulfamic acid, N,N′-dibenzylimidodisulfamic acid, N,N′-dicyclohexylimidodisulfamic acid, and N,N′-norbornylimidodisulfamic acid.

O Valence Stabilizer #6: Examples of 1,3-diketones (beta-diketonates), 1,3,5-triketones, bis(1,3-diketones), and poly(1,3-diketones), all with a molecular weight greater than 125 (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexafluoropentanedione; dibenzoylmethane (1,3-diphenyl-1,3-propanedione); benzoylpinacolone; dicyclohexoylmethane; diphenylpentanetrionate; dibenzoylacetone; benzoylacetylacetone; dibenzoylacetylacetone; tetramethylnonanetrionate; hexafluoroheptanetrionate; trifluoroheptanetrionate; trifluoroacetylcamphor (facam); and 1,3-indandione.

O Valence Stabilizer #7: Examples of 1,2-diketones (alpha-diketonates), 1,2,3-triketones, tropolonates, o-quinones, bis(1,2-diketones), and poly(1,2-diketones), all with a molecular weight greater than 100 (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tropolone; 1,2-benzoquinone (o-quinone); di-tert-butyl-1,2-benzoquinone; hexafluoro-1,2-benzoquinone; 1,2-naphthoquinone; 9,10-phenanthroquinone; and 1,2-indandione.

O Valence Stabilizer #8: Examples of malonamides (malonodiamides), bis(malonamides), and polymalonamides (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: malonamide, N-phenylmalonamide, N-benzylmalonamide, N-pentafluorophenylmalonamide, N-cyclohexylmalonamide, N-norbornylmalonamide, N,N′-diphenylmalonamide, N,N′-dibenzylmalonamide, N,N′-dipentafluorophenylmalonamide, N,N′-dicyclohexylmalonamide, and N,N′-norbornylmalonamide.

O Valence Stabilizer #9: Examples of 2-acylacetamides, bis(2-acylacetamides), and poly(2-acylacetamides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-acetoacetamide, N-phenyl-2-acetoacetamide, N-pentafluorophenyl-2-acetoacetamide, N-benzyl-2-acetoacetamide, N-cyclohexyl-2-acetoacetamide, N-norbornyl-2-acetoacetamide, N-phenyl-2-benzoacetamide, N-pentafluorophenyl-2-pentafluorobenzoacetamide, and N-cyclohexyl-2-cyclohexoacetamide.

O Valence Stabilizer #10: Examples of monothiodicarbonic diamides, bis(monothiodicarbonic diamides), and poly(monothiodicarbonic diamides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiodicarbonic diamide; N-phenylmonothiodicarbonic diamide; N-pentafluorophenylmonothiodicarbonic diamide; N-benzylmonothiodicarbonic diamide; N-cyclohexylmonothiodicarbonic diamide; N-norbornylmonothiodicarbonic diamide; N,N′-diphenylmonothiodicarbonic diamide; N,N′-dipentafluorophenylmonothiodicarbonic diamide; N,N′-dibenzylmonothiodicarbonic diamide; N,N′-dicyclohexylmonothiodicarbonic diamide; and N,N′-dinorbornylmonothiodicarbonic diamide.

O Valence Stabilizer #11: Examples of monothiodicarbonic acids, bis(monothiodicarbonic acids), poly(monothiodicarbonic acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiodicarbonic acid, O-phenylmonothiodicarbonic acid, O-benzylmonothiodicarbonic acid, O-cyclohexylmonothiodicarbonic acid, O-norbornylmonothiodicarbonic acid, O,O′-diphenylmonothiodicarbonic acid, O,O′-dibenzylmonothiodicarbonic acid, O,O′-dicyclohexylmonothiodicarbonic acid, and O,O′-dinorbornylmonothiodicarbonic acid.

O Valence Stabilizer #12: Examples of trithionic acid, bis(trithionic acid), poly(trithionic acid), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphenyl trithionate, dipentafluorodiphenyl trithionate, dicyclohexyl trithionate, and dinorbornyl trithionate.

O Valence Stabilizer #13: Examples of hypophosphoric acids, bis(hypophosphoric acids), and poly(hypophosphoric acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hypophosphoric acid, O-methylhypophosphoric acid, O-isopropylhypophosphoric acid, O-tert-butylhypophosphoric acid, O-phenylhypophosphoric acid, O-pentafluorophenylhypophosphoric acid, O-benzylhypophosphoric acid, O-cyclohexylhypophosphoric acid, O-norbornylhypophosphoric acid, O,O′′-dimethylhypophosphoric acid, O,O′′-diisopropylhypophosphoric acid, O,O′′-di-tert-butylhypophosphoric acid, O,O′′-diphenylhypophosphoric acid, O,O′′-di-pentafluorophenylhypophosphoric acid, O,O′′-dibenzylhypophosphoric acid, O,O′′-dicyclohexylhypophosphoric acid, and O,O′′-dinorbornylhypophosphoric acid.

O Valence Stabilizer #14: Examples of hypophosphoramides, bis(hypophosphoramides), and poly(hypophosphoramides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hypophosphoramide, N-methylhypophosphoramide, N-isopropylhypophosphoramide, N-tert-butylhypophosphoramide, N-phenylhypophosphoramide, N-pentafluorophenylhypophosphoramide, N-benzylhypophosphoramide, N-cyclohexylhypophosphoramide, N-norbornylhypophosphoramide, N,N′′′-dimethylhypophosphoramide, N,N′′′-diisopropylhypophosphoramide, N,N′′′-di-tert-butylhypophosphoramide, N,N′′′-diphenylhypophosphoramide, N,N′′′-di-pentafluorophenylhypophosphoramide, N,N′′′-dibenzylhypophosphoramide, N,N′′′-dicyclohexylhypophosphoramide, and N,N′′′-dinorbornylhypophosphoramide.

O Valence Stabilizer #15: Examples of imidodiphosphoric acids, hydrazidodiphosphoric acids, bis(imidodiphosphoric acids), bis(hydrazidodiphosphoric acids), poly(imidodiphosphoric acids), poly(hydrazidodiphosphoric acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodiphosphoric acid, methylimidodiphosphoric acid, isopropylimidodiphosphoric acid, tert-butylimidodiphosphoric acid, phenylimidodiphosphoric acid, pentafluorophenylimidodiphosphoric acid, benzylimidodiphosphoric acid, cyclohexylimidodiphosphoric acid, norbornylimidodiphosphoric acid, dimethylimidodiphosphoric acid, diisopropylimidodiphosphoric acid, di-tert-butylimidodiphosphoric acid, diphenylimidodiphosphoric acid, di-pentafluorophenylimidodiphosphoric acid, dibenzylimidodiphosphoric acid, dicyclohexylimidodiphosphoric acid, and dinorbornylimidodiphosphoric acid.

O Valence Stabilizer #16: Examples of imidodiphosphoramides, hydrazidodiphosphoramides, bis(imidodiphosphoramides), bis(hydrazidodiphosphoramides), poly(imidodiphosphoramides), and poly(hydrazidodiphosphoramides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodiphosphoramide, N-methylimidodiphosphoramide, N-isopropylimidodiphosphoramide, N-tert-butylimidodiphosphoramide, N-phenylimidodiphosphoramide, N-pentafluorophenylimidodiphosphoramide, N-benzylimidodiphosphoramide, N-cyclohexylimidodiphosphoramide, N-norbornylimidodiphosphoramide, N,N′′′-dimethylimidodiphosphoramide, N,N′′′-diisopropylimidodiphosphoramide, N,N′′′-di-tert-butylimidodiphosphoramide, N,N′′′-diphenylimidodiphosphoramide, N,N′′′-di-pentafluorophenylimidodiphosphoramide, N,N′′′-dibenzylimidodiphosphoramide, N,N′′′-dicyclohexylimidodiphosphoramide, and N,N′′′-dinorbornylimidodiphosphoramide.

O Valence Stabilizer #17: Examples of diphosphoramides, bis(diphosphoramides), and poly(diphosphoramides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphoramide, N-methyldiphosphoramide, N-isopropyldiphosphoramide, N-tert-butyldiphosphoramide, N-phenyldiphosphoramide, N-pentafluorophenyldiphosphoramide, N-benzyldiphosphoramide, N-cyclohexyldiphosphoramide, N-norbornyldiphosphoramide, N,N′′′-dimethyldiphosphoramide, N,N′′′-diisopropyldiphosphoramide, N,N′′′-di-tert-butyldiphosphoramide, N,N′′′-diphenyldiphosphoramide, N,N′′′-di-pentafluorophenyldiphosphoramide, N,N′′′-dibenzyldiphosphoramide, N,N′′′-dicyclohexyldiphosphoramide, and N,N′′′-dinorbornyldiphosphoramide.

O Valence Stabilizer #18: Examples of beta-hydroxyketones, beta-hydroxyaldehydes, bis(beta-hydroxyketones), bis(beta-hydroxyaldehydes), poly(beta-hydroxyketones), and poly(beta-hydroxyaldehydes) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-hydroxypentan-2-one; 1,3-diphenyl-3-hydroxypropanal; 1,3-dibenzyl-3-hydroxypropanal; 1,3-dicyclohexyl-3-hydroxypropanal; 1,3-dinorbornyl-3-hydroxypropanal; 1,3-di(2-thienyl)-3-hydroxypropanal; 1,3-di(2-furyl)-3-hydroxypropanal; o-hydroxyacetophenone; juglone; alizarin; 1-hydroxyanthraquinone; 1,8-hydroxyanthraquinone; 1-hydroxyacridone; and beta-hydroxybenzophenone.

O Valence Stabilizer #19: Examples of N-(aminomethylol)ureas[N-(aminohydroxymethyl)ureas], bis[N-(aminomethylol)ureas], and poly[N-(aminomethylol)ureas](O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N′-(aminohydroxymethyl)urea; N,N′′-dimethyl-N′-(aminohydroxymethyl)urea; N,N′-diethyl-N′-(aminohydroxymethyl)urea; N,N′′-isopropyl-N′-(aminohydroxymethyl)urea; N,N′′-diphenyl-N′-(aminohydroxymethyl)urea; N,N′′-dibenzyl-N′-(aminohydroxymethyl)urea; N,N′′-dicyclohexyl-N′-(aminohydroxymethyl)urea; and N,N′′-dinorbornyl-N′-(aminohydroxymethyl)urea.

O Valence Stabilizer #20: Examples of oxamides, bis(oxamides), and poly(oxamides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: oxamide, N-methyloxamide; N-ethyloxamide; N-isopropyloxamide; N-phenyloxamide; N-benzyloxamide; N-cyclohexyloxamide; N-norbornyloxamide; N,N′-dimethyloxamide; N,N′-diethyloxamide; N,N′-diisopropyloxamide; N,N′-diphenyloxamide; N,N′-dibenzyloxamide; N,N′-dicyclohexyloxamide; and N,N′-dinorbornyloxamide.

O Valence Stabilizer #21: Examples of squaric acids and derivatives thereof (O—O Bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: deltic acid; squaric acid; croconic acid; and rhodizonic acid.

O Valence Stabilizer #22: Examples of dicarboxylic acids, bis(dicarboxylic acids), poly(dicarboxylic acids), and derivatives thereof (O—O Bidentates and O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: oxalic acid; malonic acid; succinic acid; diphenyl oxalate; diphenyl malonate; and diphenyl succinate.

O Valence Stabilizer #23: Examples of carbamates, bis(carbamates), and poly(carbamates) (including N-hydroxycarbamates and N-mercaptocarbamates) (O—O Bidentates, O—O Tridentates, and O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethylcarbamate (dmc); di(trifluorodimethyl)carbamate; ethyl carbamate; diethylcarbamate (dec); dipropylcarbamate; diisopropylcarbamate; dibutylcarbamate; ditertbutylcarbamate; dicyanamidocarbamate; diphenylcarbamate; di(pentafluorophenyl)carbamate; dibenzylcarbamate; dinaphthylcarbamate; dicyclohexylcarbamate; dinorbornylcarbamate; diadamantylcarbamate; pyrrolidinocarbamate (pyrc); piperidinocarbamate (pipc); morpholinocarbamate (morc); thiamorpholinocarbamate; 3-pyrrolinocarbamate; pyrrolocarbamate; oxazolocarbamate; isoxazolocarbamate; thiazolocarbamate; isothiazolocarbamate; indolocarbamate; carbazolocarbamate; pyrazolinocarbamate; imidazolinocarbamate; pyrazolocarbamate; imidazolocarbamate; indazolocarbamate; and triazolocarbamate.

O Valence Stabilizer #24: Examples of carbimates, bis(carbimates), and poly(carbimates) (O—O Bidentates, O—O Tridentates, and O—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methylcarbimate; trifluoromethylcarbimate; ethylcarbimate; propylcarbimate; isopropylcarbimate; butylcarbimate; tertbutylcarbimate; cyanocarbimate; cyanamidocarbimate; azidocarbimate; phenylcarbimate; pentafluorophenylcarbimate; benzylcarbimate; naphthylcarbimate; cyclohexylcarbimate; norbornylcarbimate; and adamantylcarbimate. [Note: Carbimates tend to stabilize lower oxidation states in metal ions.]

O Valence Stabilizer #25: Examples of cyanate ligands (O monodentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyanate (—OCN).

N—S Valence Stabilizer #1: Examples of diformamidine disulfides (thioperoxydicarbonimidic diamides), thioperoxytricarbonimidic diamides, thioperoxytetracarbonimidic diamides, bis(diformamidine disulfides), and poly(diformamidine disulfides) (N—S bidentates, N—N—S tridentates, or N—S tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diformamidine disulfide; methyldiformamidine disulfide; ethyldiformamidine disulfide; isopropyldiformamidine disulfide; butyldiformamidine disulfide; benzyldiformamidine disulfide; phenyldiformamidine disulfide; tolyldiformamidine disulfide; naphthyldiformamidine disulfide; cyclohexyldiformamidine disulfide; norbornyldiformamidine disulfide; adamantyldiformamidine disulfide; dimethyldiformamidine disulfide; diethyldiformamidine disulfide; diisopropyldiformamidine disulfide; dibutyldiformamidine disulfide; dibenzyldiformamidine disulfide; diphenyldiformamidine disulfide; ditolyldiformamidine disulfide; dinaphthyldiformamidine disulfide; dicyclohexyldiformamidine disulfide; dinorbornyldiformamidine disulfide; diadamantyldiformamidine disulfide; 2-S-amidinodisulfidothiazole; 2-S-amidinodisulfidooxazole; 2-S-amidinodisulfidoimidazole; 3-S-amidinodisulfidopyrazole; 3-S-amidinodisulfido-1,2,4-triazole; and 5-S-amidinodisulfidotetrazole.

N—S Valence Stabilizer #2: Examples of S-amidinodithiocarbamates, bis(S-amidinodithiocarbamates), and poly(S-amidinodithiocarbamates) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S-amidinodithiocarbamate; N-methyl-S-amidinodithiocarbamate; N-ethyl-S-amidinodithiocarbamate; N-isopropyl-S-amidinodithiocarbamate; N-butyl-S-amidinodithiocarbamate; N-benzyl-S-amidinodithiocarbamate; N-phenyl-S-amidinodithiocarbamate; N-tolyl-S-amidinodithiocarbamate; N-naphthyl-S-amidinodithiocarbamate; N-cyclohexyl-S-amidinodithiocarbamate; N-norbornyl-S-amidinodithiocarbamate; N-adamantyl-S-amidinodithiocarbamate; N,N′-dimethyl-S-amidinodithiocarbamate; N,N′-diethyl-S-amidinodithiocarbamate; N,N′-diisopropyl-S-amidinodithiocarbamate; N,N′-dibutyl-S-amidinodithiocarbamate; N,N′-dibenzyl-S-amidinodithiocarbamate; N,N′-diphenyl-S-amidinodithiocarbamate; N,N′-ditolyl-S-amidinodithiocarbamate; N,N′-dinaphthyl-S-amidinodithiocarbamate; N,N′-dicyclohexyl-S-amidinodithiocarbamate; N,N′-dinorbornyl-S-amidinodithiocarbamate; N,N′-diadamantyl-S-amidinodithiocarbamate; ethylenebis(S-amidinodithiocarbamate); propylenebis(S-amidinodithiocarbamate); phenylenebis(S-amidinodithiocarbamate); piperazinebis(S-amidinodithiocarbamate); oxalylbis(S-amidinodithiocarbamate); malonylbis(S-amidinodithiocarbamate); succinylbis(S-amidinodithiocarbamate); phthalylbis(S-amidinodithiocarbamate); 2-S-dithiocarbamatothiazole; 2-S-dithiocarbamatooxazole; 2-S-dithiocarbamatoimidazole; 3-S-dithiocarbamatopyrazole; 3-S-dithiocarbamato-1,2,4-triazole; and 5-S-dithiocarbamatotetrazole.

N—S Valence Stabilizer #3: Examples of O-amidinothiocarbamates, bis(O-amidinothiocarbamates), and poly(O-amidinothiocarbamates) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: O-amidinothiocarbamate; N-methyl-O-amidinothiocarbamate; N-ethyl-O-amidinothiocarbamate; N-isopropyl-O-amidinothiocarbamate; N-butyl-O-amidinothiocarbamate; N-benzyl-O-amidinothiocarbamate; N-phenyl-O-amidinothiocarbamate; N-tolyl-O-amidinothiocarbamate; N-naphthyl-O-amidinothiocarbamate; N-cyclohexyl-O-amidinothiocarbamate; N-norbornyl-O-amidinothiocarbamate; N-adamantyl-O-amidinothiocarbamate; N,N′-dimethyl-O-amidinothiocarbamate; N,N′-diethyl-O-amidinothiocarbamate; N,N′-diisopropyl-O-amidinothiocarbamate; N,N′-dibutyl-O-amidinothiocarbamate; N,N′-dibenzyl-O-amidinothiocarbamate; N,N′-diphenyl-O-amidinothiocarbamate; N,N′-ditolyl-O-amidinothiocarbamate; N,N′-dinaphthyl-O-amidinothiocarbamate; N,N′-dicyclohexyl-O-amidinothiocarbamate; N,N′-dinorbornyl-O-amidinothiocarbamate; N,N′-diadamantyl-O-amidinothiocarbamate; ethylenebis(O-amidinothiocarbamate); propylenebis(O-amidinothiocarbamate); phenylenebis(O-amidinothiocarbamate); piperazinebis(O-amidinothiocarbamate); oxalylbis(O-amidinothiocarbamate); malonylbis(O-amidinothiocarbamate); succinylbis(O-amidinothiocarbamate); phthalylbis(O-amidinothiocarbamate); 2-O-monothiocarbamatothiazole; 2-O-monothiocarbamatooxazole; 2-O-monothiocarbamatoimidazole; 3-O-monothiocarbamatopyrazole; 3-O-monothiocarbamato-1,2,4-triazole; and 5-O-monothiocarbamatotetrazole.

N—S Valence Stabilizer #4: Examples of S-amidinoperoxythiocarbamates, bis(S-amidinoperoxythiocarbamates), and poly(S-amidinoperoxythiocarbamates) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S-amidinoperoxythiocarbamate; N-methyl-S-amidinoperoxythiocarbamate; N-ethyl-S-amidinoperoxythiocarbamate; N-isopropyl-S-amidinoperoxythiocarbamate; N-butyl-S-amidinoperoxythiocarbamate; N-benzyl-S-amidinoperoxythiocarbamate; N-phenyl-S-amidinoperoxythiocarbamate; N-tolyl-S-amidinoperoxythiocarbamate; N-naphthyl-S-amidinoperoxythiocarbamate; N-cyclohexyl-S-amidinoperoxythiocarbamate; N-norbornyl-S-amidinoperoxythiocarbamate; N-adamantyl-S-amidinoperoxythiocarbamate; N,N′-dimethyl-S-amidinoperoxythiocarbamate; N,N′-diethyl-S-amidinoperoxythiocarbamate; N,N′-diisopropyl-S-amidinoperoxythiocarbamate; N,N′-dibutyl-S-amidinoperoxythiocarbamate; N,N′-dibenzyl-S-amidinoperoxythiocarbamate; N,N′-diphenyl-S-amidinoperoxythiocarbamate; N,N′-ditolyl-S-amidinoperoxythiocarbamate; N,N′-dinaphthyl-S-amidinoperoxythiocarbamate; N,N′-dicyclohexyl-S-amidinoperoxythiocarbamate; N,N′-dinorbornyl-S-amidinoperoxythiocarbamate; N,N′-diadamantyl-S-amidinoperoxythiocarbamate; ethylenebis(S-amidinoperoxythiocarbamate); propylenebis(S-amidinoperoxythiocarbamate); phenylenebis(S-amidinoperoxythiocarbamate); piperazinebis(S-amidinoperoxythiocarbamate); oxalylbis (S-amidinoperoxythiocarbamate); malonylbis (S-amidinoperoxythiocarbamate); succinylbis(S-amidinoperoxythiocarbamate); and phthalylbis(S-amidinoperoxythiocarbamate).

N—S Valence Stabilizer #5: Examples of phosphorimidothioic acid; phosphorimidodithioic acid; phosphorimidotrithioic acid; bis(phosphorimidothioic acid); bis(phosphorimidodithioic acid); bis(phosphorimidotrithioic acid); poly(phosphorimidothioic acid); poly(phosphorimidodithioic acid); poly(phosphorimidotrithioic acid); and derivatives thereof (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphorimidothioic acid; phosphorimidodithioic acid; phosphorimidotrithioic acid; O-phenylphosphorimidothioic acid; O-benzylphosphorimidothioic acid; O-cyclohexylphosphorimidothioic acid; O-norbornylphosphorimidothioic acid; O,O′-diphenylphosphorimidothioic acid; O,O′-dibenzylphosphorimidothioic acid; O,O′-dicyclohexylphosphorimidothioic acid; and O,O′-dinorbornylphosphorimidothioic acid.

N—S Valence Stabilizer #6: Examples of phosphorothioic triamides, bis(phosphorothioic triamides), and poly(phosphorothioic triamides) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphorothioic triamide; phosphorothioic trihydrazide; phosphoramidothioic dihydrazide; N-phenylphosphorothioic triamide; N-benzylphosphorothioic triamide; N-cyclohexylphosphorothioic triamide; N-norbornylphosphorothioic triamide; N,N′-diphenylphosphorothioic triamide; N,N′-dibenzylphosphorothioic triamide; N,N′-dicyclohexylphosphorothioic triamide; and N,N′-dinorbornylphosphorothioic triamide.

N—S Valence Stabilizer #7: Examples of phosphoramidotrithioic acid, phosphorodiamidodithioic acid, bis(phosphoramidotrithioic acid), bis(phosphorodiamidodithioic acid), poly(phosphoramidotrithioic acid), poly(phosphorodiamidodithioic acid), and derivatives thereof (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidotrithioic acid, phosphorodiamidodithioic acid, S-phenylphosphoramidotrithioic acid, S-benzylphosphoramidotrithioic acid, S-cyclohexylphosphoramidotrithioic acid, S-norbornylphosphoramidotrithioic acid, S,S′-diphenylphosphoramidotrithioic acid, S,S′-dibenzylphosphoramidotrithioic acid, S,S′-dicyclohexylphosphoramidotrithioic acid, and S,S′-dinorbornylphosphoramidotrithioic acid.

N—S Valence Stabilizer #8: Examples of phosphoramidothioic acid, phosphoramidodithioic acid, phosphorodiamidothioic acid, bis(phosphoramidothioic acid), bis(phosphoramidodithioic acid), bis(phosphorodiamidothioic acid), poly(phosphoramidothioic acid), poly(phosphoramidodithioic acid), and poly(phosphorodiamidothioic acid) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidothioic acid, phosphoramidodithioic acid, phosphorodiamidothioic acid, phosphorohydrazidothioic acid, phosphorohydrazidodithioic acid, phosphorodihydrazidothioic acid, phosphoramidohydrazidothioic acid, O-phenylphosphoramidothioic acid, O-benzylphosphoramidothioic acid, O-cyclohexylphosphoramidothioic acid, O-norbornylphosphoramidothioic acid, S-phenylphosphoramidodithioic acid, S-benzylphosphoramidodithioic acid, S-cyclohexylphosphoramidodithioic acid, and S-norbornylphosphoramidodithioic acid.

N—S Valence Stabilizer #9: Examples of N-thioacyl 7-aminobenzylidenimines (N—S Bidentates or N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-thioacetyl 7-methylaminobenzylidenimine; N-thioacetyl 7-phenylaminobenzylidenimine; N-thiobenzoyl 7-methylaminobenzylidenimine; and N-thiobenzoyl 7-phenylaminobenzylidenimine.

N—S Valence Stabilizer #10: Examples of thiohydroxamates (thiohydroxylamines), bis(thiohydroxamates), and poly(thiohydroxamates) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetothiohydroxamic acid; propianothiohydroxamic acid; butyrothiohydroxamic acid; crotonothiohydroxamic acid; sorbothiohydroxamic acid; benzothiohydroxamic acid; toluicthiohydroxamic acid; salicylthiohydroxamic acid; phenylacetothiohydroxamic acid; anthranilthiohydroxamic acid; nicotinethiohydroxamic acid; picolinethiohydroxamic acid; cyclohexanethiohydroxamic acid; quinoline 8-thiohydroxamic acid; cinnamylthiohydroxamic acid; oxaldithiohydroxamic acid; succinylbis-N-phenylthiohydroxamic acid; adipylbis-N-phenylthiohydroxamic acid; glyoxalthiohydroxamic acid; 2-thiophenethiocarbohydroxamic acid; thenoylthiohydroxamic acid; N-phenylbenzothiohydroxamic acid; N-tolylbenzothiohydroxamic acid; N-phenylacetothiohydroxamic acid; N-phenyl-2-thenoylthiohydroxamic acid; and N-tolyl-2-thenoylthiohydroxamic acid.

N—S Valence Stabilizer #11: Examples of alpha- or ortho-aminothiocarboxylic acids, and alpha- or ortho-aminothiodicarboxylic acids, and derivatives thereof (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-pyridinethiocarboxylic acid (thiopicolinic acid); 2-pyrazinethiocarboxylic acid; o-aminothiobenzoic acid; o-aminothionaphthoic acid; and 3,6-diaminothiophthalic acid.

N—S Valence Stabilizer #12: Examples of thiosemicarbazones, bis(thiosemicarbazones), and poly(thiosemicarbazones) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde thiosemicarbazone; acetone thiosemicarbazone; pinacolone thiosemicarbazone; benzaldehyde thiosemicarbazone; naphthaldehyde thiosemicarbazone; norbornanone thiosemicarbazone; camphor thiosemicarbazone; nopinone thiosemicarbazone; 2-pyridinaldehyde thiosemicarbazone; salicylaldehyde thiosemicarbazone; quinolinaldehyde thiosemicarbazone; isatin dithiosemicarbazone; camphorquinone dithiosemicarbazone; camphorquinone dithiosemicarbazone; picolinaldehyde thiosemicarbazone; dipyridyl glyoxal dithiosemicarbazone; di-2-pyridyl ketone thiosemicarbazone; methyl-2-pyridyl ketone thiosemicarbazone; glyoxal dithiosemicarbazone; acetophenone thiosemicarbazone; biacetyl monoxime thiosemicarbazone; acetamidobenzaldehyde thiosemicarbazone; thymolaldothiosemicarbazone; thiophene-2-aldehyde thiosemicarbazone; phthalaldehyde dithiosemicarbazone; phthalimide dithiosemicarbazone; furaldehyde thiosemicarbazone; naphthoquinone thiosemicarbazone; phenanthrequinone thiosemicarbazone; cyclohexanedione dithiosemicarbazone; ionone thiosemicarbazone; bisthiosemicarbazone of diethyl-3,4-dioxadioate; pyridoxal alkylthiosemicarbazones; benzylidene phenylthiosemicarbazones; lawsone thiosemicarbazone; and 1-benzoin-4-phenylthiosemicarbazone (bps).

N—S Valence Stabilizer #13: Examples of thioacyl hydrazones, bis(thioacyl hydrazones), and poly(thioacyl hydrazones) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde N-thioformylhydrazone; acetaldehyde N-thiobenzoylhydrazone; acetone N-thioformylhydrazone; acetone N-thiobenzoylhydrazone; pinacolone N-thioformylhydrazone; pinacolone N-thiobenzoylhydrazone; benzaldehyde N-thioformylhydrazone; benzaldehyde N-thiobenzoylhydrazone; naphthaldehyde N-thioformylhydrazone; naphthaldehyde N-thiobenzoylhydrazone; norbornanone N-thioformylhydrazone; norbornanone N-thiobenzoylhydrazone; camphor N-thioformylhydrazone; camphor N-thiobenzoylhydrazone; nopinone N-thioformylhydrazone; nopinone N-thiobenzoylhydrazone; 2-pyridinaldehyde N-thioformylhydrazone; 2-pyridinaldehyde N-thiobenzoylhydrazone; salicylaldehyde N-thioformylhydrazone; salicylaldehyde N-thiobenzoylhydrazone; quinolinaldehyde N-thioformylhydrazone; quinolinaldehyde N-thiobenzoylhydrazone; thiophene-2-aldehyde N-thioformylhydrazone; thiophene-2-aldehyde N-thiobenzoylhydrazone; naphthoquinone N-thioformylhydrazone; naphthoquinone N-thiobenzoylhydrazone; ionone N-thioformylhydrazone; ionone N-thiobenzoylhydrazone; benzaldehyde benzothiazolehydrazone; lawsone N-thioformylhydrazone; and lawsone N-thiobenzoylhydrazone.

N—S Valence Stabilizer #14: Examples of thiocarbazones (diazenecarbothioic hydrazides), bis(thiocarbazones), and poly(thiocarbazones) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphenylthiocarbazone (dithizone); 2-phenylthiocarbazone; dinaphthylthiocarbazone; 2-naphthylthiocarbazone; and ambazone.

N—S Valence Stabilizer #15: Examples of azo compounds with thiol or mercapto or thiocarbonyl substitution at the ortho- (for aryl) or alpha- or beta- (for alkyl) positions, Bis[o-(HS—) or alpha- or beta-(HS-)azo compounds], or Poly[o-(HS—) or alpha- or beta-(HS-)azo compounds) (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-thiolazobenzene[1-(phenylazo)-2-thiophenol]; 2,2′-dithioazobenzene; (2-thiophene)azobenzene; 1-(4-nitrophenylazo)-2-thionaphthol; 2-thiazolylazobenzene; and 2-benzothiazolylazobenzene.

N—S Valence Stabilizer #16: Examples of diazeneformothioamides, diazeneacetothioamides, bis(diazeneformothioamides), bis(diazeneacetothioamides), poly(diazeneformothioamides), and poly(diazeneacetothioamides) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformothioamide, diazeneacetothioamide, phenyldiazeneformothioamide, diphenyldiazeneformothioamide, phenyldiazeneacetothioamide, and diphenyldiazeneacetothioamide.

N—S Valence Stabilizer #17: Examples of diazenecarbothioic acids, diazenecarbodithioic acids, bis(diazenecarbothioic acids), bis(diazenecarbodithioic acids), poly(diazenecarbothioic acids), poly(diazenecarbodithioic acids) and derivatives thereof (N—S Bidentates, N—S Tetradentates, N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformothioic acid, diazeneacetothioic acid, phenyldiazeneformothioic acid, diphenyldiazeneformothioic acid, phenyldiazeneacetothioic acid, and diphenyldiazeneacetothioic acid.

N—S Valence Stabilizer #18: Examples of diazeneformothioaldehydes, diazeneacetothioaldehydes, bis(diazeneformothioaldehydes), bis(diazeneacetothioaldehydes), poly(diazeneformothioaldehydes), and poly(diazeneacetothioaldehydes) (N—S Bidentates, N—S Tetradentates and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformothioaldehyde, diazeneacetothioaldehyde, phenyldiazeneformothioaldehyde, diphenyldiazeneformothioaldehyde, phenyldiazeneacetothioaldehyde, and diphenyldiazeneacetothioaldehyde.

N—S Valence Stabilizer #19: Examples of diazenediformothioamides, diazenediacetothioamides, bis(diazenediformothioamides), bis(diazenediacetothioamides), poly(diazenediformothioamides), and poly(diazenediacetothioamides) (N—S Tridentates and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformodithioamide, diazenediacetodithioamide, diphenydiazenediformodithioamide, tetraphenyldiazenediformodithioamide, diphenyldiazenediacetodithioamide, and tetraphenyldiazenediacetodithioamide.

N—S Valence Stabilizer #20: Examples of diazenedicarbothioic acids, diazenedicarbodithioic acids, bis(diazenedicarbothioic acids), bis(diazenedicarbodithioic acids), poly(diazenedicarbothioic acids), poly(diazenedicarbodithioic acids) and derivatives thereof (N—S Tridentates and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformothioic acid, diazenediacetodithioic acid, phenyldiazenediformothioic acid, diphenyldiazenediformothioic acid, phenyldiazenediacetodithioic acid, and diphenyldiazenediacetodithioic acid.

N—S Valence Stabilizer #21: Examples of diazenediformothioaldehydes, diazenediacetothioaldehydes, bis(diazenediformothioaldehydes), bis(diazenediacetothioaldehydes), poly(diazenediformothioaldehydes), and poly(diazenediacetothioaldehydes) (N—S Tridentates and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformothioaldehyde, diazenediacetothioaldehyde, diphenyldiazenediformothioaldehyde, and diphenyldiazenediacetothioaldehyde.

N—S Valence Stabilizer #22: Examples of ortho-thio (or -mercapto) substituted formazans, bis(o-thio or -mercapto substituted formazans), and poly(o-thio or -mercapto substituted formazans) (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1-(2-thiophenyl)-3,5-diphenylformazan; 1-(2-methylmercaptophenyl)-3,5-diphenylformazan; 1,5-bis(2-thiophenyl)-3-phenylformazan; and 5-bis(2-methylmercaptophenyl)-3-phenylformazan.

N—S Valence Stabilizer #23: Examples of ortho-thio (or -mercapto) substituted azines (including ketazines), bis(o-thio or mercapto substituted azines), and poly(o-thio or mercapto substituted azines) (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercapto-1-benzalazine; 2-mercapto-1-naphthalazine; and 2-mercapto-1-cyclohexanonazine.

N—S Valence Stabilizer #24: Examples of Schiff Bases with one Imine (C═N) Group and with ortho- or alpha- or beta-thio or mercapto or thiocarbonyl substitution (N—S Bidentates, N—S Tridentates, N—S Tetradentates, N—S Pentadentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-(Thiosalicylaldehydo)isopropylamine; N-(2-thiophenecarboxaldehydo)isopropylamine; N-(2-Acetylthiopheno)isopropylamine; N-(2-Thioacetophenono)isopropylamine; N-(Thiosalicylaldehydo)cyclohexylamine; N-(2-Thiophenecarboxaldehydo)cyclohexylamine; N-(2-Acetylthiopheno)cyclohexylamine; N-(2-Thioacetophenono)cyclohexylamine; N-(Thiosalicylaldehydo)aniline; N-(2-Thiophenecarboxaldehydo)aniline; N-(2-Acetylthiopheno)aniline; N-(2-Thioacetophenono)aniline; N-(Thiosalicylaldehydo)aminonorbornane; N-(2-Thiocarboxaldehydo)aminonorbornane; N-(2-Acetylthiopheno)aminonorbornane; N-(2-Thioacetophenono)aminonorbornane; 4-aminobenzylidene-3-propyl-5-mercapto-1,2,4-triazole; 4-aminocinnamalidene-3-propyl-5-mercapto-1,2,4-triazole (acpmt); 4-aminosalicylidene-3-propyl-5-mercapto-1,2,4-triazole (aspmt); 4-aminovanillidene-3-propyl-5-mercapto-1,2,4-triazole; 4-aminodimethylaminobenzylidene-3-propyl-5-mercapto-1,2,4-triazole (adpmt); cinnamylideneaminophenylthiazole; N-(2-mercaptophenyl)salicylidenimine; 2-thiophenecarboxaldehyde phenylhydrazone; 2-thiophenecarboxaldehyde 2-pyridyl hydrazone; 2-mercaptobenzaldehyde phenylhydrazone; and 2-mercaptobenzaldehyde 2-pyridyl hydrazone. Also includes Schiff Bases derived from the reaction of carbonyl compounds with dithiocarbazates, and hydrazones with ortho-S substitution.

N—S Valence Stabilizer #25: Examples of Schiff Bases with two Imine (C═N) Groups and with ortho- or alpha- or beta-thio or mercapto or thiocarbonyl substitution (N—S Tridentates, N—S Tetradentates, N—S Pentadentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-(2,5-Thiophenedicarboxaldehydo)diisopropylamine; N,N′-(2,5-Thiophenedicarboxaldehydo)dicyclohexylamine; N,N′-(2,5-Thiophenedicarboxaldehydo)dianiline; N,N′-(2,5-Thiophenedicarboxaldehydo)di-aminonorbornane; N,N′-(o-Thiophthalicdialdehydo)diisopropylamine; N,N′-(o-Thiophthalicdialdehydo)dicyclohexylamine; N,N′-(o-Thiophthalicdialdehydo)dianiline; N,N′-(o-Thiophthalicdialdehydo)di-aminonorbornane; N,N′-(o-Thioformylcamphoro)diisopropylamine; N,N′-(o-Thioformylcamphoro)dicyclohexylamine; N,N′-(o-Thioformylcamphoro)dianiline; N,N′-(o-Thioformylcamphoro)di-aminonorbornane; N,N′-(o-Thiodiacetylbenzeno)diisopropylamine; N,N′-(o-Thiodiacetylbenzeno)dicyclohexylamine; N,N′-(o-Thiodiacetylbenzeno)dianiline; N,N′-(o-Thiodiacetylbenzeno)di-aminonorbornane; N,N′-(3,6-Dithio-1,2-cyclohexanono)diisopropylamine; N,N′-(3,6-Dithio-1,2-cyclohexanono)dicyclohexylamine; N,N′-(3,6-Dithio-1,2-cyclohexanono)dianiline; N,N′-(3,6-Dithio-1,2-cyclohexanono)di-aminonorbornane; N,N′-(2,5-Diacetylthiopheno)diisopropylamine; N,N′-(2,5-Diacetylthiopheno)dicyclohexylamine; N,N′-(2,5-Diacetylthiopheno)dianiline; N,N′-(2,5-Diacetylthiopheno)di-aminonorbornane; N,N′-(Thiosalicylaldehydo)ethylenediamine; N,N′-(o-Thionaphthaldehydo)ethylenediamine; N,N′-(o-Thioacetophenono)ethylenediamine; N,N′-(Thiosalicylaldehydo)trimethylenediamine; N,N′-(o-Thionaphthaldehydo)trimethylenediamine; N,N′-(o-Thioacetophenono)trimethylenediamine; N,N′-(Thiosalicylaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Thionaphthaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Thioacetophenono)cyclohexane-1,2-diamine; N,N′-(Thiosalicylaldehydo)-1,2-diaminobenzene; N,N′-(o-Thionaphthaldehydo)-1,2-diaminobenzene; and N,N′-(o-Thioacetophenono)-1,2-diaminobenzene. Also includes Schiff Bases derived from the reaction of carbonyl compounds with dithiocarbazates, and hydrazones with ortho-S substitution.
N—S Valence Stabilizer #26: Examples of Schiff Bases with three Imine (C═N) Groups and with ortho- or alpha- or beta-thio or mercapto or thiocarbonyl substitution (N—S Tetradentates, N—S Pentadentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′,N′′-(Thiosalicylaldehydo)tris(2-aminoethyl)amine; N,N′,N′′-(o-Thionaphthaldehydo)tris(2-aminoethyl)amine; and N,N′,N′′-(o-Thioacetophenono)tris(2-aminoethyl)amine. Also includes Schiff Bases derived from the reaction of carbonyl compounds with dithiocarbazates, and hydrazones with ortho-S substitution.

N—S Valence Stabilizer #27: Examples of thioalkyl amines (aminothiols or aminodisulfides) and thioalkyl imines (iminothiols or iminodisulfides) (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercapto-1-aminoethane; 2-methylmercapto-1-aminoethane; 3-mercapto-1-aminopropane; 1-mercapto-2-amino-2-methylpropane; 2-mercaptocyclohexylamine; 3-mercapto-2-aminonorbornane; 1,3-dimercapto-2-aminopropane; 1,5-dimercapto-3-aminopentane; 2,2′-diaminodiethyl sulfide; 3,3′-diaminodipropyl sulfide; 2,2′-diaminodicyclohexyl sulfide; 1,6-dimercapto-3,4-diaminohexane; 1,7-dimercapto-3,5-diaminoheptane; 1,6-diamino-3,4-dimercaptohexane; 1,7-diamino-3,5-dimercaptoheptane; tri(mercaptomethyl)amine; tri(2-mercaptoethyl)amine; dithiooxamide (rubeanic acid); 2,2′-diaminodiethyl disulfide; 3,3′-diaminodipropyl disulfide; 2,2′-diaminodicyclohexyl disulfide; 3-amino-1,5-pentanedithiodialdehyde; 3,4-diamino-1,6-hexanedithiodialdehyde; 3,5-diamino-1,7-heptanedithiodialdehyde; iminobisacetic acid; iminobispropionic acid; and bis(hydroxyethyl)aminoalkyl sulfide.

N—S Valence Stabilizer #28: Examples of thioaryl amines and thioaryl imines (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminothiophenol (2-aminobenzenethiol); 2-aminothiobenzoic acid (thioanthranilic acid); 2-aminothioanisole; 2-(methanamine)benzyl mercaptan [(2-aminomethyl)-alpha-toluenethiol][(2-mercaptomethyl)-alpha-aminotoluene]; 1-amino-2-naphthalenethiol; 2-amino-1-naphthalenethiol; 2-amino-1-(methyldisulfido)benzene; 2,2′-di(aminomethyl)diphenylthioketone; di(2-amino)phenyl sulfide; di(2-amino)phenyl disulfide (di-ortho-aminophenyl disulfide (doapd)); 1,3-di(2-amino)phenyl-2-mercaptopropane; 1,3-di(3-amino)phenyl-2-mercaptopropane; 1,3-di(2-mercapto)phenyl-2-aminopropane; 1,3-di(3-mercapto)phenyl-2-aminopropane; 2,2′-dimercaptoiminodibenzyl; 2,2′-iminodibenzothioic acid; 2,2′-dimercaptoiminostilbene; and poly(o-aminothiophenol).

N—S Valence Stabilizer #29: Examples of five-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional sulfur atom binding site not in a ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercaptopyrrole; 2-(methylthio)methylpyrrole; 2,5-(thiomethyl)pyrrole; 2,5-(methylthiomethyl)pyrrole; 2,6-(methyldisulfidomethyl)pyrrole; imidazoline-2-thione (2-mercaptoimidazole); 2-mercaptothiazoline; 2-mercaptobenzimidazole; 2-mercaptobenzothiazole; 2-mercaptobenzoxazole; 2-thiohydantoin; di-2-pyridylthioglyoxal (2,2′-thiopyridil); bis((1-pyrazolyl)methane)sulfide; bis((1-pyrazolyl)methane)disulfide; bis(2-(1-pyrazolyl)ethane)sulfide; bis(2-(1-pyrazolyl)ethane)disulfide; bis(benzimidazolylmethane)sulfide; bis(benzimidazolylethane)sulfide; bis(benzimidazolylmethane)disulfide; bis(benzimidazolylethane)disulfide; tris(imidazolyl)methanethiol; tris(imidazolylmethane)methanethiol; N-thiomethyl-N,N-(benzimidazolylmethane)amine; N-(2-thioethyl)-N,N-(benzimidazolylmethane)amine; N,N′-di(benzimidazolylmethane)-1,3-diamino-2-mercaptopropane; N,N,N′,N′-tetrakis(benzimidazolylmethane)-1,3-diamino-2-mercaptopropane; bis(N,N-((4-imidazolyl)methane)-2-aminoethane)sulfide; bis(N,N-((4-imidazolyl)methane)-2-aminoethane)disulfide; 2-aminobenzothiazole (abt); 2-phenylaminothiazole; thiohydantoin; thioxohydropyrazole; 2-mercaptobenzothiazole (mbt); 2-mercapto-1,3,4-thiadiazole; 2,5-dimercapto-1,3,4-thiadiazole (bismuthiol); 2,5-bis(alkylthio)-1,3,4-thiadiazole; 2-amino-5-mercapto-1,3,4-thiadiazole (amt); 5-mercaptotetrazole; 1-phenyl-5-mercaptotetrazole (pmt)(5-mptt); 5-mercaptotriazole; 3-mercaptotriazole; (2-benzothiazolyl)thioacetic acid; (2-benzothiazolyl)thiopropionic acid; (alkylthio)benzotriazoles; (arylthio)benzotriazoles; 2-mercaptopyrimidine; bis(5-mercapto-1,2,4-triazol-3-yl); bis(5-mercapto-1,2,4-triazol-3-yl)alkanes; 2-aminothiazolidine; thiazolidine-2-thione; 2-mercaptothiazolidine; 1-(2-mercaptoethyl)imidazoline; imidazolidine-2-thione; 4,5-dihydroxyimidazolidine-2-thione; 4-amino-5-mercapto-1,2,4-triazole; (2-benzimidazolylthio)carboxylic acids; (2-benzoxazolylthio)carboxylic acids; (2-benzothiazolylthio)carboxylic acids; (2-benzimidazolylthio)hydroxyalkyl(aryl)s; (2-benzoxazolylthio)hydroxyalkyl(aryl)s; (2-benzothiazolylthio)hydroxyalkyl(aryl)s; 2-(phenylmethylthio)benzothiazole; 2,5-bis(hydrocarbyldithio)-1,3,4-thiadiazoles; 2-(hydrocarbyldithio)-5-mercapto-1,3,4-thiadiazoles; bis(dithiobisthiadiazole); benzothiazolethione; 3-hydrazino-5-thio-1,2,4-triazole; imidazolidine-2,4-dithione; dimercaptobenzothiazole; 2-aminothiazole (atz); thiadiazole-2-thione; 5-mercaptothiadiazole-2-thione; 1,1-thiocarbonyldiimidazole; phosphosphonomethylenethio-1,3-benzothiazole (pmtbt); 4,5-dihydroxyimidazolidine-2-thione; imidazolidine-2-thione; 1,1′-thiocarbonyldiimidazole; 2,2′-dithiobis(benzothiazole); and 5,5′-dithiobis(tetrazole).

N—S Valence Stabilizer #30: Examples of six-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional sulfur atom binding site not in a ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-aminomethyl-3-pyridinemethanethiol (including thiopyridoxamine); 2-mercaptopyridine; 2-(methylthio)methylpyridine; 2-(2-(methylthio)ethyl)pyridine; 2,6-(thiomethyl)pyridine; 2,6-(methylthiomethyl)pyridine; 2,6-(methyldisulfidomethyl)pyridine; 2-mercaptopyrimidine; 2-dithiomethylpyrimidine; 2-mercaptoquinoline; 8-mercaptoquinoline (thioxine); 8-methylthioquinoline; 2-mercaptoquinazoline; thioorotic acid (1,2,3,6-tetrahydro-2,6-dithiono-4-pyrimidinecarboxylic acid) (6-thiouracilcarboxylic acid); 1-methylpyrimidine-2-thione; 2-thiouracil; 2,4-dithiouracil; 6-mercaptopurine; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminomethane)sulfide; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminomethane)disulfide; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminoethane)sulfide; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminoethane)disulfide; 1,3,5-triazine-6-thione; 2-benzylmercapto-1,3,5-triazine; triazine dithiols [i.e. 6-(phenylamino)-1,3,5-triazine-2,4-dithiol (ptd); 6-aniline-1,3,5-triazine-2,4-dithiol (atd); and 2-(N,N-dialkylamino)-1,3,5-triazine-4,6-dithiol]; 2-thioquinazoline; 2-thioquinazolin-4-one; thiomorpholin-3-thione; [2-(aminomethyl)thio]pyridine; 6-mercaptopurine; dithiouracil; and 2,2′-dithiodipyridine (2,2′-dipyridyl disulfide).

N—S Valence Stabilizer #31: Examples of five-membered heterocyclic rings containing one or two sulfur atoms at least one additional nitrogen atom binding site not in a ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminothiophene; 2,5-diaminothiophene; 2-aminomethylthiophene; 2,5-di(aminomethyl)thiophene; 2-aminobenzothiophene; and 2-iminothiolane.

N—S Valence Stabilizer #32: Examples of six-membered heterocyclic rings containing one or two sulfur atoms at least one additional nitrogen atom binding site not in a ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminothiopyran; 2,6-diaminothiopyran; 2-aminomethylthiopyran; 2,6-di(aminomethyl)thiopyran; and 2-aminobenzothiopyran.

N—S Valence Stabilizer #33: Examples of five-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional sulfur atom binding site in a separate ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-thiophene)pyrrole; 2,5-di(2-thiophene)pyrrole; 2-(2-thiopyran)pyrrole; 2,5-di(2-thiopyran)pyrrole; 2,5-di(2-pyrrole)thiophene; 2,6-di(2-pyrrole)thiopyran; and 3,5-bis(2-thienyl)-4-amino-1,2,4-triazole (2-tat).

N—S Valence Stabilizer #34: Examples of six-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional sulfur atom binding site in a separate ring (N—S Bidentates, N—S Tridentates, N—S Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-thiadiazolyl)benzimidazole; 2-(2-thiophene)pyridine; 2,6-di(2-thiophene)pyridine; 2-(2-thiopyran)pyridine; 2,6-di(2-thiopyran)pyridine; 2,5-di(2-pyridyl)thiophene; 2,6-di(2-pyridyl)thiopyran; and 2-(4-thiazolyl)benzimidazole.

N—S Valence Stabilizer #35: Examples of two-, three-, four-, six-, eight-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) or sulfur (usually thiols, mercaptans, or thiocarbonyls) and are not contained in component heterocyclic rings (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azathiacyclobutane ([4]aneNS); azathiacyclopentane ([5]aneNS); azathiacyclohexane ([6]aneNS); azathiacycloheptane ([7]aneNS); azathiacyclooctane ([8]aneNS); azathiacyclobutene ([4]eneNS); azathiacyclopentene ([5]eneNS); azathiacyclohexene ([6]eneNS); azathiacycloheptene ([7]eneNS); azathiacyclooctene ([8]eneNS); azathiacyclobutadiene ([4]dieneNS); azathiacyclopentadiene ([5]dieneNS); azathiacyclohexadiene ([6]dieneNS); azathiacycloheptadiene ([7]dieneNS); azathiacyclooctadiene ([8]dieneNS); diazathiacyclohexane ([6]aneSN2); diazathiacycloheptane ([7]aneSN2); diazathiacyclooctane ([8]aneSN2); diazathiacyclononane ([9]aneSN2); diazathiacyclodecane ([10]aneSN2); diazathiacycloundecane ([11]aneSN2); diazathiacyclododecane ([12]aneSN2); diazathiacyclohexene ([6]eneSN2); diazathiacycloheptene ([7]eneSN2); diazathiacyclooctene ([8]eneSN2); diazathiacyclononene ([9]eneSN2); diazathiacyclodecene ([10]eneSN2); diazathiacycloundecene ([11]eneSN2); diazathiacyclododecene ([12]eneSN2); diazadithiacyclooctane ([8]aneS2N2); diazadithiacyclononane ([9]aneS2N2); diazadithiacyclodecane ([10]aneS2N2); diazadithiacycloundecane ([11]aneS2N2); diazadithiacyclododecane ([12]aneS2N2); diazadithiacyclotridecane ([13]aneS2N2); diazadithiacyclotetradecane ([14]aneS2N2); diazadithiacyclopentadecane ([15]aneS2N2); diazadithiacyclohexadecane ([16]aneS2N2); diazadithiacycloheptadecane ([17]aneS2N2); diazadithiacyclooctadecane ([18]aneS2N2); diazadithiacyclononadecane ([19]aneS2N2); diazadithiacycloeicosane ([20]aneS2N2); diazadithiacyclooctadiene ([8]dieneS2N2); diazadithiacyclononadiene ([9]dieneS2N2); diazadithiacyclodecadiene ([10]dieneS2N2); diazadithiacycloundecadiene ([11]dieneS2N2); diazadithiacyclododecadiene ([12]dieneS2N2); diazadithiacyclotridecadiene ([13]dieneS2N2); diazadithiacyclotetradecadiene ([14]dieneS2N2); diazadithiacyclopentadecadiene ([15]dieneS2N2); diazadithiacyclohexadecadiene ([16]dieneS2N2); diazadithiacycloheptadecadiene ([17]dieneS2N2); diazadithiacyclooctadecadiene ([18]dieneS2N2); diazadithiacyclononadecadiene ([19]dieneS2N2); diazadithiacycloeicosadiene ([20]dieneS2N2); and tetramethyldithiahexaazacyclobidecanehexaene (mtab).

N—S Valence Stabilizer #36: Examples of four-, six-, eight-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or sulfur and are contained in component heterocyclic rings (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiopyrandipyridines; dithiophenedipyrroles; trithiopyrantripyridines; trithiophenetripyrroles; tetrathiopyrantetrapyridines; and tetrathiophenetetrapyrroles.

N—S Valence Stabilizer #37: Examples of four-, six-, eight-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or sulfur and are contained in a combination of heterocyclic rings and amine, imine, thiol, mercapto, or thiocarbonyl groups (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azathiatetraphyrins; diazadithiatetraphyrins; azathiahexaphyrins; diazadithiahexaphyrins; and triazatrithiahexaphyrins.

N—O Valence Stabilizer #1: Examples of N-hydroxy(or N,N′-dihydroxy)amidines and N-hydroxy(or N,N′-dihydroxy)diamidines (N—O bidentates, N—O tridentates, or N—O tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-hydroxy-N,N′-dimethylformamidine; N-hydroxy-N,N′-diethylformamidine; N-hydroxy-N,N′-diisopropylformamidine; N-hydroxy-N,N′-dibutylformamidine; N-hydroxy-N,N′-diphenylformamidine; N-hydroxy-N,N′-dibenzylformamidine; N-hydroxy-N,N′-dinaphthylformamidine; N-hydroxy-N,N′-dicyclohexylformamidine; N-hydroxy-N,N′-dinorbornylformamidine; N-hydroxy-N,N′-diadamantylformamidine; N-hydroxy-N,N′-dianthraquinonylformamidine; N-hydroxy-N,N′-dimethylacetamidine; N-hydroxy-N,N′-diethylacetamidine; N-hydroxy-N,N′-diisopropylacetamidine; N-hydroxy-N,N′-dibutylacetamidine; N-hydroxy-N,N′-diphenylacetamidine; N-hydroxy-N,N′-dibenzylacetamidine; N-hydroxy-N,N′-dinaphthylacetamidine; N-hydroxy-N,N′-dicyclohexylacetamidine; N-hydroxy-N,N′-dinorbornylacetamidine; N-hydroxy-N,N′-diadamantylacetamidine; N-hydroxy-N,N′-dimethylbenzamidine; N-hydroxy-N,N′-diethylbenzamidine; N-hydroxy-N,N′-diisopropylbenzamidine; N-hydroxy-N,N′-dibutylbenzamidine; N-hydroxy-N,N′-diphenylbenzamidine; N-hydroxy-N,N′-dibenzylbenzamidine; N-hydroxy-N,N′-dinaphthylbenzamidine; N-hydroxy-N,N′-dicyclohexylbenzamidine; N-hydroxy-N,N′-dinorbornylbenzamidine; N-hydroxy-N,N′-diadamantylbenzamidine; N-hydroxy-N,N′dimethyltoluamidine; N-hydroxy-N,N′-diethyltoluamidine; N-hydroxy-N,N′-diisopropyltoluamidine; N-hydroxy-N,N′-dibutyltoluamidine; N-hydroxy-N,N′-diphenyltoluamidine; N-hydroxy-N,N′-dibenzyltoluamidine; N-hydroxy-N,N′-dinaphthyltoluamidine; N-hydroxy-N,N′-dicyclohexyltoluamidine; N-hydroxy-N,N′-dinorbornyltoluamidine; N-hydroxy-N,N′-diadamantyltoluamidine; N,N-dihydroxyoxalic diamidine; N,N′-dihydroxymalonic diamidine; N,N′-dihydroxysuccinic diamidine; N,N′-dihydroxyglutaric diamidine; N,N′-dihydroxyadipic diamidine; N,N′-dihydroxypimelic diamidine; N,N′-dihydroxysuberic diamidine; N,N′-dihydroxyphthalic diamidine; N,N′-dihydroxyterephthalic diamidine; N,N′-dihydroxyisophthalic diamidine; N,N′-dihydroxypiperazine diamidine.

N—O Valence Stabilizer #2: Examples of guanylureas, guanidinoureas, bis(guanylureas), bis(guanidinoureas), poly(guanylureas), and poly(guanidinoureas) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: guanylurea (amidinourea)(dicyandiamidine); guanidinourea; methylguanylurea; ethylguanylurea; isopropylguanylurea; butylguanylurea; benzylguanylurea; phenylguanylurea; tolylguanylurea; naphthylguanylurea; cyclohexylguanylurea; norbornylguanylurea; adamantylguanylurea; dimethylguanylurea; diethylguanylurea; diisopropylguanylurea; dibutylguanylurea; dibenzylguanylurea; diphenylguanylurea; ditolylguanylurea; dinaphthylguanylurea; dicyclohexylguanylurea; dinorbornylguanylurea; diadamantylguanylurea; ethylenebis(guanylurea); propylenebis(guanylurea); phenylenebis(guanylurea); piperazinebis(guanylurea); oxalylbis(guanylurea); malonylbis(guanylurea); succinylbis(guanylurea); phthalylbis(guanylurea); 2-ureidothiazole; 2-ureidooxazole; 2-ureidoimidazole; 3-ureidopyrazole; 3-ureido-1,2,4-triazole; and 5-ureidotetrazole.

N—O Valence Stabilizer #3: Examples of amidinoamides, guanidinoamides, bis(amidinoamides), bis(guanidinoamides), poly(amidinoamides), and poly(guanidinoamides) (including both N-amidinoamides and 2-amidinoacetamides) (N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: amidinoacetamide (1-acetylguanidine); guanidinoacetamide; amidinopropanamide; amidinobutanamide; amidinobenzamide; amidinotoluamide; amidinocyclohexamide; N-methylamidinoacetamide; N-ethylamidinopropanamide; N-propylamidinobutanamide; N-phenylamidinobenzamide; N-tolylamidinotoluamide; N-cyclohexylamidinocyclohexamide; bis(amidinooxamide); bis(amidinomalonamide); bis(amidinosuccinamide); bis(amidinophthalamide); 2-amidinoacetamide (malonamamidine); N-methyl-2-amidinoacetamide; N-ethyl-2-amidinoacetamide; N-phenyl-2-amidinoacetamide; N-benzyl-2-amidinoacetamide; N-cyclohexyl-2-amidinoacetamide; N,N′-dimethyl-2-amidinoacetamide; N,N′-diethyl-2-amidinoacetamide; N,N′-diphenyl-2-amidinoacetamide; N,N′-dibenzyl-2-amidinoacetamide; N,N′-dicyclohexyl-2-amidinoacetamide; 2-N-acylaminothiazole; 2-N-acylaminooxazole; 2-N-acylaminoimidazole; 3-N-acylaminopyrazole; 3-N-acylamino-1,2,4-triazole; and 5-N-acylaminotetrazole.

N—O Valence Stabilizer #4: Examples of imidoylamides, bis(imidoylamides), and poly(imidoylamides) (N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetimidoylacetamide; acetimidoylpropanamide; acetimidoylbutanamide; acetimidoylbenzamide; acetimidolytoluamide; acetimidoylcyclohexamide; propimidoylpropanamide; butimidoylbutanamide; benzimidoylbenzamide; ethylenebis(acetimidoylacetamide); propylenebis(acetimidoylacetamide); and phenylenebis(acetimidoylacetamide).

N—O Valence Stabilizer #5: Examples of O-amidinocarbamates, bis(O-amidinocarbamates), and poly(O-amidinocarbamates) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: O-amidinocarbamate; N-methyl-O-amidinocarbamate; N-ethyl-O-amidinocarbamate; N-isopropyl-O-amidinocarbamate; N-butyl-O-amidinocarbamate; N-benzyl-O-amidinocarbamate; N-phenyl-O-amidinocarbamate; N-tolyl-O-amidinocarbamate; N-naphthyl-O-amidinocarbamate; N-cyclohexyl-O-amidinocarbamate; N-norbornyl-O-amidinocarbamate; N-adamantyl-O-amidinocarbamate; N,N′-dimethyl-O-amidinocarbamate; N,N′-diethyl-O-amidinocarbamate; N,N′-diisopropyl-O-amidinocarbamate; N,N′-dibutyl-O-amidinocarbamate; N,N′-dibenzyl-O-amidinocarbamate; N,N′-diphenyl-O-amidinocarbamate; N,N′-ditolyl-O-amidinocarbamate; N,N′-dinaphthyl-O-amidinocarbamate; N,N′-dicyclohexyl-O-amidinocarbamate; N,N′-dinorbornyl-O-amidinocarbamate; N,N′-diadamantyl-O-amidinocarbamate; ethylenebis(O-amidinocarbamate); propylenebis(O-amidinocarbamate); phenylenebis(O-amidinocarbamate); piperazinebis(O-amidinocarbamate); oxalylbis(O-amidinocarbamate); malonylbis(O-amidinocarbamate); succinylbis(O-amidinocarbamate); phthalylbis(O-amidinocarbamate); 2-O-carbamatothiazole; 2-O-carbamatooxazole; 2-O-carbamatoimidazole; 3-O-carbamatopyrazole; 3-O-carbamato-1,2,4-triazole; and 5-carbamatotetrazole.

N—O Valence Stabilizer #6: Examples of S-amidinothiocarbamates, bis(S-amidinothiocarbamates), and poly(S-amidinothiocarbamates) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S-amidinothiocarbamate; N-methyl-S-amidinothiocarbamate; N-ethyl-S-amidinothiocarbamate; N-isopropyl-S-amidinothiocarbamate; N-butyl-S-amidinothiocarbamate; N-benzyl-S-amidinothiocarbamate; N-phenyl-S-amidinothiocarbamate; N-tolyl-S-amidinothiocarbamate; N-naphthyl-S-amidinothiocarbamate; N-cyclohexyl-S-amidinothiocarbamate; N-norbornyl-S-amidinothiocarbamate; N-adamantyl-S-amidinothiocarbamate; N,N′-dimethyl-S-amidinothiocarbamate; N,N′-diethyl-S-amidinothiocarbamate; N,N′-diisopropyl-S-amidinothiocarbamate; N,N′-dibutyl-S-amidinothiocarbamate; N,N′-dibenzyl-S-amidinothiocarbamate; N,N′-diphenyl-S-amidinothiocarbamate; N,N′-ditolyl-S-amidinothiocarbamate; N,N′-dinaphthyl-S-amidinothiocarbamate; N,N′-dicyclohexyl-S-amidinothiocarbamate; N,N′-dinorbornyl-S-amidinothiocarbamate; N,N′-diadamantyl-S-amidinothiocarbamate; ethylenebis(S-amidinothiocarbamate); propylenebis (S-amidinothiocarbamate); phenylenebis (S-amidinothiocarbamate); piperazinebis(S-amidinothiocarbamate); oxalylbis(S-amidinothiocarbamate); malonylbis (S-amidinothiocarbamate); succinylbis (S-amidinothiocarbamate); phthalylbis(S-amidinothiocarbamate); 2-O-monothiocarbamatothiazole; 2-O-monothiocarbamatooxazole; 2-O-monothiocarbamatoimidazole; 3-O-monothiocarbamatopyrazole; 3-O-monothiocarbamato-1,2,4-triazole; and 5-O-monothiocarbamatotetrazole.

N—O Valence Stabilizer #7: Examples of diimidosulfuric acid, bis(diimidosulfuric acid), and derivatives thereof (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diimidosulfuric acid; O-phenyldiimidosulfuric acid; O-benzyldiimidosulfuric acid, O-cyclohexyldiimidosulfuric acid, O-norbornyldiimidosulfuric acid, O,O′-diphenyldiimidosulfuric acid; O,O′-dibenzyldiimidosulfuric acid, O,O′-dicyclohexyldiimidosulfuric acid, and O,O′-dinorbornyldiimidosulfuric acid.

N—O Valence Stabilizer #8: Examples of phosphorimidic acid, bis(phosphorimidic acid); and poly(phosphorimidic acid), and derivatives thereof (N—O Bidentates, N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphorimidic acid; O-phenylphosphorimidic acid; O-benzylphosphorimidic acid; O-cyclohexylphosphorimidic acid; O-norbornylphosphorimidic acid; O,O′-diphenylphosphorimidic acid; O,O′-dibenzylphosphorimidic acid; O,O′-dicyclohexylphosphorimidic acid; and O,O′-dinorbornylphosphorimidic acid.

N—O Valence Stabilizer #9: Examples of phosphoric triamides, bis(phosphoric triamides), and poly(phosphoric triamides) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoric triamide; phosphoramidic dihydrazide; N-phenylphosphoric triamide, N-benzylphosphoric triamide; N-cyclohexylphosphoric triamide; N-norbornylphosphoric triamide; N,N′-diphenylphosphoric triamide, N,N′-dibenzylphosphoric triamide; N,N′-dicyclohexylphosphoric triamide; and N,N′-dinorbornylphosphoric triamide.

N—O Valence Stabilizer #10: Examples of phosphoramidic acid, phosphorodiamidic acid, bis(phosphoramidic acid), bis(phosphorodiamidic acid), poly(phosphoramidic acid), poly(phosphorodiamidic acid), and derivatives thereof (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoramidic acid, phosphorodiamidic acid, phosphoramidohydrazidic acid; phosphorohydrazidic acid; phosphorodihydrazidic acid; O-phenylphosphoramidic acid; O-benzylphosphoramidic acid; O-cyclohexylphosphoramidic acid; O-norbornylphosphoramidic acid; O,O′-diphenylphosphoramidic acid; O,O′-dibenzylphosphoramidic acid; O,O′-dicyclohexylphosphoramidic acid; and O,O′-dinorbornylphosphoramidic acid.

N—O Valence Stabilizer #11: Examples of N-acyl 7-aminobenzylidenimines (N—O Bidentates or N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-acetyl 7-methylaminobenzylidenimine; N-acetyl 7-phenylaminobenzylidenimine; N-benzoyl 7-methylaminobenzylidenimine; and N-benzoyl 7-phenylaminobenzylidenimine.

N—O Valence Stabilizer #12: Examples of oximes, dioximes, and poly(oximes) (N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldoxime (Hado); acetoxime (acetone oxime)(Hato); butanone oxime; pentanone oxime; hexanone oxime; pinacolone oxime; heptanone oxime; octanone oxime; cyclopentanone oxime; cyclohexanone oxime; cycloheptanone oxime; cyclooctanone oxime; cyclopentanedione dioxime; cyclohexanedione dioxime; cycloheptanedione dioxime; cyclooctanedione dioxime; isatin dioxime; benzaldehyde oxime; naphthaldehyde oxime; norbornanone oxime; camphor oxime; dimethylglyoxime (H2DMG); diethylglyoxime; diisopropylglyoxime; ditertbutylglyoxime; dicyanoglyoxime; dicyanamidoglyoxime; diphenylglyoxime (Hdfg); dibenzylglyoxime; dicyclohexylglyoxime; dinorbornylglyoxime; camphorquinone dioxime (Hcqd); nopinoquinone dioxime (Hnqd); butyraldoxime; propionaldoxime; furildioxime; and thienyldioxime.

N—O Valence Stabilizer #13: Examples of carbonyl oximes, bis(carbonyl oximes), and poly(carbonyl oximes) (N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diacetyl monoxime (2,3-butanedione monoxime); benzil monoxime (1,2-diphenylethanedione monoxime); 1,2-dicyclohexylethanedione monoxime; 1,2-(trifluoromethyl)ethanedione monoxime; 1,2-dinorbornylethanedione monoxime; cyclopentanedione monoxime; cyclohexanedione monoxime; cycloheptanedione monoxime; cyclooctanedione monoxime; camphorquinone oxime; 3-hydroxyiminopentane-2,4-dione; and 4-isonitrosopyralozone.

N—O Valence Stabilizer #14: Examples of imine oximes, bis(imine oximes), and poly(imine oximes) (including 2-nitrogen heterocyclic oximes) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-(methylimino)butan-2-one oxime; 4-(methylimino)hexan-3-one oxime; 1,2-diphenyl-2-(methylimino)ethan-1-one oxime; 1,2-diphenyl-2-(phenylimino)ethan-1-one oxime; 1,2-dicyclohexyl-2-(methylimino)ethan-1-one oxime; 1,2-dicyclohexyl-2-(cyclohexylimino)ethan-1-one oxime; 1,2-dinorbornyl-2-(methylimino)ethan-1-one oxime; N,N′-methylenebis-(3-iminobutan-2-one oxime); N,N′-methylenebis-(4-iminohexan-3-one oxime); N,N′-methylenebis-(1,2-diphenyl-2-iminoethan-1-one oxime); N,N′-methylenebis-(1,2-dicyclohexyl-2-iminoethan-1-one oxime); N,N′-methylenebis-(1,2-dinorbornyl-2-iminoethan-1-one oxime); N,N′-ethylenebis-(3-iminobutan-2-one oxime); N,N′-ethylenebis-(4-iminohexan-3-one oxime); N,N′-ethylenebis-(1,2-diphenyl-2-iminoethan-1-one oxime); N,N′-ethylenebis-(1,2-dicyclohexyl-2-iminoethan-1-one oxime); N,N′-ethylenebis-(1,2-dinorbornyl-2-iminoethan-1-one oxime); N,N′-propylenebis-(3-iminobutan-2-one oxime); N,N′-propylenebis-(4-iminohexan-3-one oxime); N,N′-propylenebis-(1,2-diphenyl-2-iminoethan-1-one oxime); N,N′-propylenebis-(1,2-dicyclohexyl-2-iminoethan-1-one oxime); N,N′-propylenebis-(1,2-dinorbornyl-2-iminoethan-1-one oxime); diacetylazine oxime (Hazio); 2-pyridinaldoxime (Hpao); methyl 2-pyridyl ketone oxime; ethyl 2-pyridyl ketoxime; phenyl 2-pyridyl ketone oxime (Hppk); benzyl 2-pyridyl ketoxime; di(2-pyridyl) ketone oxime; methyl 2-pyrrolyl ketone oxime; ethyl 2-pyrrolyl ketone oxime; phenyl 2-pyrrolyl ketone oxime; di(2-pyrrolyl) ketone oxime; and tris(2-aldoximo-6-pyridyl)phosphine.

N—O Valence Stabilizer #15: Examples of hydroxy oximes, bis(hydroxy oximes), and poly(hydroxy oximes) (including 2-oxygen heterocyclic oximes) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-hydroxybutan-2-one oxime; 4-hydroxyhexan-3-one oxime; benzoin oxime (bo)(1,2-diphenyl-2-hydroxyethanone oxime); 1,2-di(trifluoromethyl)-2-hydroxyethanone oxime; 1,2-dicyclohexyl-2-hydroxyethanone oxime; 1,2-dinorbornyl-2-hydroxyethanone oxime; salicylaldoxime (so)(saldox); 2-hydroxy-1-naphthaldehyde oxime; 2-furanaldoxime; furildioxime; methyl 2-furanyl ketone oxime; ethyl 2-furanyl ketoxime; phenyl 2-furanyl ketone oxime; benzyl 2-furanyl ketoxime; di(2-furanyl) ketone oxime; and 2,5-(oximinomethyl)phenol.

N—O Valence Stabilizer #16: Examples of amino oximes, bis(amino oximes), and poly(amino oximes) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-(methylamino)butan-2-one oxime (HMeabo); 4-(methylamino)hexan-3-one oxime (HEtabo); 1,2-diphenyl-2-(methylamino)ethanone oxime (HPhabo); 1,2-diphenyl-2-(phenylamino)ethanone oxime; 1,2-dicyclohexyl-2-(methylamino)ethanone oxime (HcyHxabo); 1,2-dicyclohexyl-2-(cyclohexylamino)ethanone oxime; 1,2-di(trifluoromethyl)-2-(methylamino)ethanone oxime; 1,2-dinorbornyl-2-(methylamino)ethanone oxime (HNorbabo); N,N′-ethylenebis-(3-aminobutan-2-one oxime)(Haboen); N,N′-ethylenebis-(4-aminohexan-3-one oxime); N,N′-ethylenebis-(1,2-diphenyl-2-aminoethanone oxime); N,N′-ethylenebis-(1,2-dicyclohexyl-2-aminoethanone oxime); N,N′-ethylenebis-(1,2-di(trifluoromethyl)-2-aminoethanone oxime); N,N′-ethylenebis-(1,2-dinorbornyl-2-aminoethanone oxime); N,N′-propylenebis-(3-aminobutan-2-one oxime)(Habopn); N,N′-propylenebis-(4-aminohexan-3-one oxime); N,N′-propylenebis-(1,2-diphenyl-2-aminoethanone oxime); N,N′-propylenebis-(1,2-dicyclohexyl-2-aminoethanone oxime); N,N′-propylenebis-(1,2-di(trifluoromethyl)-2-aminoethanone oxime); N,N′-propylenebis-(1,2-dinorbornyl-2-aminoethanone oxime); 2,2′-iminobis(acetamidoxime); 1-diethylamino-3-butanoxime; and di-2-pyridyl ketone oxime.

N—O Valence Stabilizer #17: Examples of amido oximes, bis(amido oximes), and poly(amido oximes) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: formamide oxime; acetamide oxime; propanamide oxime; butanamide oxime; benzamide oxime (Hbamox); naphthamide oxime; diformamide dioxime; salicylamide oxime; and 4-imidazolamide oxime.

N—O Valence Stabilizer #18: Examples of azo oximes, bis(azo oximes), and poly(azo oximes) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde phenylhydrazone oxime; propionaldehyde phenylhydrazone oxime; and benzaldehyde phenylhydrazone oxime. Also includes hydrazone oximes.

N—O Valence Stabilizer #19: Examples of 2-nitrosophenols (o-quinone monoximes) (N—O Bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-nitrosophenol; 1-nitroso-2-naphthol (Honn); 2-nitroso-1-naphthol (Htnn); 3-nitrosopyrocatechol; 3,6-dinitrosopyrocatechol; 2-nitrosoresorcinol; 2,4-dinitrosoresorcinol; 2,4,6-trinitrosoresorcinol; 2-nitrosohydroquinone; 2,6-dinitrosohydroquinone; 2,3,5,6-tetranitrosohydroquinone; 4-nitrosopyrogallol; 4,6-dinitrosopyrogallol; 2-nitrosophloroglucinol; 2,4,6-trinitrosophloroglucinol; 7-nitroso-6-hydroxyindazole; Pigment Green 12 (C.I. 10020); Naphthol Green; and nitroso-R-salt.

N—O Valence Stabilizer #20: Examples of 2-nitrophenols (N—O Bidentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-nitrophenol; 2,3-dinitrophenol; 2,4-dinitrophenol; 2,5-dinitrophenol; 2,6-dinitrophenol; 2,4,6-trinitrophenol (picric acid); 2-amino-4,6-dinitrophenol (picramic acid); 1-nitro-2-naphthol; 2-nitro-1-naphthol; 3-nitropyrocatechol; 3,6-dinitropyrocatechol; 2-nitroresorcinol; 2,4-dinitroresorcinol; 2,4,6-trinitroresorcinol (styphnic acid); 2-nitrohydroquinone; 2,6-dinitrohydroquinone; 2,3,5,6-tetranitrohydroquinone; 4-nitropyrogallol; 4,6-dinitropyrogallol; 2-nitrophloroglucinol; 2,4,6-trinitrophloroglucinol; dinitrocresol; 7-nitro-6-hydroxyindazole; Dinoseb; Eosin; Naphthol Yellow; and Martius Yellow.

N—O Valence Stabilizer #21: Examples of hydroxamates (hydroxylamines), bis(hydroxamates), and poly(hydroxamates) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetohydroxamic acid; propianohydroxamic acid; butyrohydroxamic acid; crotonohydroxamic acid; sorbohydroxamic acid; benzohydroxamic acid (BH2); toluichydroxamic acid; salicylhydroxamic acid (SH2); phenylacetohydroxamic acid (PhH2); anthranilhydroxamic acid (AnH2); nicotinehydroxamic acid (NicH2); picolinehydroxamic acid; cyclohexanehydroxamic acid (CH2); quinoline 8-hydroxamic acid (QH2); cinnamylhydroxamic acid (CnH2); oxaldihydroxamic acid (OxalH2); succinylbis-N-phenylhydroxamic acid (SuH2); adipylbis-N-phenylhydroxamic acid (AdH2); glyoxalhydroxamic acid (GH2); 2-thiophenecarbohydroxamic acid; thenoylhydroxamic acid; N-phenylbenzohydroxamic acid; N-tolylbenzohydroxamic acid; N-phenylacetohydroxamic acid; N-phenyl-2-thenoylhydroxamic acid; N-tolyl-2-thenoylhydroxamic acid; and polyhydroxamic acids.

N—O Valence Stabilizer #22: Examples of N-nitrosohydroxylamines, bis(N-nitrosohydroxylamines), and poly(N-nitrosohydroxylamines) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-nitrosophenylhydroxylamine (cupferron); N-nitrosonaphthylhydroxylamine (neocupferron); N-nitrosoanthracylhydroxylamine; N-nitroso(2-pyridyl)hydroxylamine; and N-nitroso(2-thiophenyl)hydroxylamine.

N—O Valence Stabilizer #23: Examples of amino acids, ortho-aminocarboxylic acids, peptides, polypeptides, and proteins [N—O Bidentates, N—O Tridentates, and N—O Tetradentates; possibly S—O dentates for sulfur-contg. examples such as penicillamine and cystine] that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: alanine (Ala); arginine (Arg); asparagine (Asn); aspartic acid (Asp); cysteine (Cys); cystine (Cys or Cys.Cys); dihydroxyphenylalanine (Dopa); glutamic acid (Glu); glutamine (Gln); glycine (Gly); histidine (His); isoleucine (Ile); leucine (Leu); lysine (Lys); methionine (Met); penicillamine (Pen); phenylalanine (Phe); tolylalanine (tala); proline (Pro); sarcosine; serine (Ser); threonine (Thr); tryptophan (Trp); tyrosine (Tyr); and valine (Val) as amino acid examples; 2-pyridinecarboxylic acid (picolinic acid), 2-pyrazinecarboxylic acid, 2,3-dicarboxypyrazine, and anthranilic acid as ortho-aminocarboxylic acid examples; Gly-GluO; Hgly-Gly; Gly-MetO; Met-GlyO; Gly-TyrO; Ala-H is O; Gly-His-GlyO; Gly-Gly-His; Gly-Leu-TyrO; penta-GlyO; His-His; triaminoisobutyrate; tetra-GlyO; Pro-Gly; and Gly-Met as peptide examples; and azurin, carbonic anhydrase C; carboxypeptidase; concanavalin A; cytochrome b; cytochrome c; erythrocruorin; ferredoxin; haemerythrin; haemoglobin; myoglobin; parvalbumin; albumin; plastocyanin; rubredoxin; superoxide dismutase; thermolysin; and trysin as protein examples; N-acylamino acids; aminocaproic acid; and 3,5-diiodotyrosine.

N—O Valence Stabilizer #24: Examples of amides, bis(amides), and poly(amides), including lactams (N—O bidentates, N—O tridentates, and N—O tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetamide; propionamide; butanamide; benzamide (benzoylamide)(1-phenylformamide); 1-naphthylformamide; toluamide; 1-cyclohexylformamide); 1-norbornylformamide; 1-adamantylformamide; N,N-dimethylformamide (DMF)(DMFA); N,N-dimethylacetamide (DMAC); N,N-dimethylbenzamide; N,N-diethylformamide; N,N-diethylacetamide; decanamide; dodecanamide; tetradecanamide; hexadecanamide; octadecanamide; lactobionic acid amide; (hydroxyalkylthio)succinamides; (mercaptoalkoxy)succinamides; polycaproamides; glycinamide; aminoalkylanilides; amidopolyamines (apa); bis(1-phenylethylamide); oxalic semiamide; malonic semiamide; succinic semiamide; bis(1,1′-benzotriazolyl)dicarboxamide; nicotinamide; acetanilide (N-phenylacetamide); formanilide (N-phenylformamide); benzanilide (N-phenylbenzamide); N-methylformanilide; acetanilide; nicotinanilide; 4′-hydroxyacetanilide (acetaminophen); 2-pyrrolidone; methyl-2-pyrrolidone (NMP); 2-piperidone (valerolactam); caprolactam; polymethylenepolyamine dipropionamide; polyacrylamides; polypyrrolidones [including polyvinylpyrrolidone (povidone)(PVP)]; pyrazolidinones; pyrazolones; diazepinones; N-alkylazaalkene lactams; and N-(2-hydroxyalkyl)azaalkene lactams.

N—O Valence Stabilizer #25: Examples of semicarbazones, bis(semicarbazones), and poly(semicarbazones) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde semicarbazone; acetone semicarbazone; pinacolone semicarbazone; benzaldehyde semicarbazone; naphthaldehyde semicarbazone; norbornanone semicarbazone; camphor semicarbazone; nopinone semicarbazone; 2-pyridinaldehyde semicarbazone; salicylaldehyde semicarbazone; quinolinaldehyde semicarbazone; isatin disemicarbazone; camphorquinone disemicarbazone; camphorquinone disemicarbazone; picolinaldehyde semicarbazone; dipyridyl glyoxal disemicarbazone; di-2-pyridyl ketone semicarbazone; methyl-2-pyridyl ketone semicarbazone; glyoxal disemicarbazone; acetophenone semicarbazone; biacetyl monoxime semicarbazone; acetamidobenzaldehyde semicarbazone; thymolaldosemicarbazone; thiophene-2-aldehyde semicarbazone; phthalaldehyde disemicarbazone; phthalimide disemicarbazone; furaldehyde semicarbazone; naphthoquinone semicarbazone; phenanthrequinone semicarbazone; cyclohexanedione disemicarbazone; ionone semicarbazone; bissemicarbazone of diethyl-3,4-dioxadioate; and lawsone semicarbazone.

N—O Valence Stabilizer #26: Examples of acyl hydrazones, bis(acyl hydrazones), and poly(acyl hydrazones) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde N-formylhydrazone; acetaldehyde N-benzoylhydrazone; acetone N-formylhydrazone; acetone N-benzoylhydrazone; pinacolone N-formylhydrazone; pinacolone N-benzoylhydrazone; benzaldehyde N-formylhydrazone; benzaldehyde N-benzoylhydrazone; naphthaldehyde N-formylhydrazone; naphthaldehyde N-benzoylhydrazone; norbornanone N-formylhydrazone; norbornanone N-benzoylhydrazone; camphor N-formylhydrazone; camphor N-benzoylhydrazone; nopinone N-formylhydrazone; nopinone N-benzoylhydrazone; 2-pyridinaldehyde N-formylhydrazone; 2-pyridinaldehyde N-benzoylhydrazone; salicylaldehyde N-formylhydrazone; salicylaldehyde N-benzoylhydrazone; quinolinaldehyde N-formylhydrazone; quinolinaldehyde N-benzoylhydrazone; furan-2-aldehyde N-formylhydrazone; furan-2-aldehyde N-benzoylhydrazone; naphthoquinone N-formylhydrazone; naphthoquinone N-benzoylhydrazone; ionone N-formylhydrazone; ionone N-benzoylhydrazone; lawsone N-formylhydrazone; and lawsone N-benzoylhydrazone.

N—O Valence Stabilizer #27: Examples of carbazones (diazenecarboxylic hydrazides), bis(carbazones), and poly(carbazones) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphenylcarbazone; 2-phenylcarbazone; dinaphthylcarbazone; and 2-naphthylcarbazone.

N—O Valence Stabilizer #28: Examples of azo compounds with hydroxyl or carboxy or carbonyl substitution at the ortho- (for aryl) or alpha- or beta- (for alkyl) positions, Bis[o-(HO—) or alpha- or beta-(HO-)azo compounds], or Poly[o-(HO—) or alpha- or beta-(HO-)azo compounds) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxyazobenzene[1-(phenylazo)-2-phenol]; 2,2′-dihydroxyazobenzene (o,o′-dihydroxyazobenzene); (2-furan)azobenzene; Direct Blue 2B; 1-(4-nitrophenylazo)-2-naphthol; 1-(2-hydroxyphenylazo)-2-naphthol; 1-(2-methoxyphenylazo)-2-naphthol; pyridineazo-2-naphthol (PAN); pyridineazoresorcinol (PAR); 1-phenyl-4-(2-hydroxyphenylazo)-5-pyrazolone; 1-phenyl-4-(2-methoxyphenylazo)-5-pyrazolone; o-hydroxy-o′-(beta-aminoethylamino)azobenzene; 2-hydroxy-2′-methoxymethyleneoxyazobenzene; methyl red; turquoise blue (reactive blue); sunset yellow; amaranth; tartrazine; Eriochrome Black T; tropeolins; Allura Red; amaranth; Acid Alizarin Violet N; Acid Blue 29; Acid Orange 8, 63, and 74; Acid Red 1, 4, 8, 37, 88, 97, 114, 151, and 183; Acid Violet 7; Acid Yellow 25, 29, 34, 42, 76, and 99; Brilliant Black BN; Brilliant Crocein; Bordeaux R; Calcion; Chicago Sky Blue; Chromotrope; Cibacron Brilliant Red; Cibacron Brilliant Yellow; Crocein Orange; Crystal Scarlet; Calmagite; Direct Blue 71; Direct Red 23, 80, and 81; Direct Violet 51; Direct Yellow 8 and 27; Fast Black; Flavazin; Mordant Blue 9; Mordant Brown 1 and 33; Napthol Blue Black; New Coccine; Nitrazine Yellow; Nitrosulfonazo III; Orange II; Orange G, OT, and B; Ponceau 3R and SX; Polar Yellow; 2-oxazolylazobenzene; and 2-benzoxazolylazobenzene.

N—O Valence Stabilizer #29: Examples of diazeneformamides, diazeneacetamides, bis(diazeneformamides), bis(diazeneacetamides), poly(diazeneformamides), and poly(diazeneacetamides) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformamide, diazeneacetamide, phenyldiazeneformamide, diphenyldiazeneformamide, phenyldiazeneacetamide, and diphenyldiazeneacetamide.

N—O Valence Stabilizer #30: Examples of diazeneformic acids, diazeneacetic acids, bis(diazeneformic acids), bis(diazeneacetic acids), poly(diazeneformic acids), poly(diazeneacetic acids) and derivatives thereof (N—O Bidentates, N—O Tetradentates, N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformic acid, diazeneacetic acid, phenyldiazeneformic acid, diphenyldiazeneformic acid, phenyldiazeneacetic acid, and diphenyldiazeneacetic acid.

N—O Valence Stabilizer #31: Examples of diazeneformaldehydes, diazeneacetaldehydes, bis(diazeneformaldehydes), bis(diazeneacetaldehydes), poly(diazeneformaldehydes), and poly(diazeneacetaldehydes) (N—O Bidentates, N—O Tetradentates and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazeneformaldehyde, diazeneacetaldehyde, phenyldiazeneformaldehyde, diphenyldiazeneformaldehyde, phenyldiazeneacetaldehyde, and diphenyldiazeneacetaldehyde.

N—O Valence Stabilizer #32: Examples of diazenediformamides, diazenediacetamides, bis(diazenediformamides), bis(diazenediacetamides), poly(diazenediformamides), and poly(diazenediacetamides) (N—O Tridentates and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformamide, diazenediacetamide, diphenydiazenediformamide, tetraphenyldiazenediformamide, diphenyldiazenediacetamide, and tetraphenyldiazenediacetamide.

N—O Valence Stabilizer #33: Examples of diazenediformic acids, diazenediacetic acids, bis(diazenediformic acids), bis(diazenediacetic acids), poly(diazenediformic acids), poly(diazenediacetic acids) and derivatives thereof (N—O Tridentates and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformic acid, diazenediacetic acid, phenyldiazenediformic acid, diphenyldiazenediformic acid, phenyldiazenediacetic acid, and diphenyldiazenediacetic acid.

N—O Valence Stabilizer #34: Examples of diazenediformaldehydes, diazenediacetaldehydes, bis(diazenediformaldehydes), bis(diazenediacetaldehydes), poly(diazenediformaldehydes), and poly(diazenediacetaldehydes) (N—O Tridentates and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazenediformaldehyde, diazenediacetaldehyde, diphenyldiazenediformaldehyde, and diphenyldiazenediacetaldehyde.

N—O Valence Stabilizer #35: Examples of ortho-hydroxy (or -carboxy) substituted formazans, bis(o-hydroxy or -carboxy substituted formazans), and poly(o-hydroxy or -carboxy substituted formazans) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1-(2-hydroxyphenyl)-3,5-diphenylformazan; 1-(2-methoxyphenyl)-3,5-diphenylformazan; 1,5-bis(2-hydroxyphenyl)-3-phenylformazan; and 5-bis(2-methoxyphenyl)-3-phenylformazan.

N—O Valence Stabilizer #36: Examples of ortho-hydroxy (or -carboxy) substituted azines (including ketazines), bis(o-hydroxy or carboxy substituted azines), and poly(o-hydroxy or carboxy substituted azines) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxy-1-benzalazine; 2-hydroxy-1-naphthalazine; and 2-hydroxy-1-cyclohexanonazine.

N—O Valence Stabilizer #37: Examples of Schiff Bases with one Imine (C═N) Group and with ortho- or alpha- or beta-hydroxy or carboxy or carbonyl substitution (N—O Bidentates, N—O Tridentates, N—O Tetradentates, N—O Pentadentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-(Salicylaldehydo)isopropylamine; N-(2-Furfuralo)isopropylamine; N-(2-Acetylfurano)isopropylamine; N-(2-Hydroxyacetophenono)isopropylamine; N-(Pyridoxalo)isopropylamine; N-(Salicylaldehydo)cyclohexylamine; N-(2-Furfuralo)cyclohexylamine; N-(2-Acetylfurano)cyclohexylamine; N-(2-Hydroxyacetophenono)cyclohexylamine; N-(Pyridoxalo)cyclohexylamine; N-(Salicylaldehydo)aniline; N-(2-Furfuralo)aniline (Stenhauz salt); N-(2-Acetylfurano)aniline; N-(2-Hydroxyacetophenono)aniline; N-(Pyridoxalo)aniline; N-(Salicylaldehydo)aminonorbornane; N-(2-Furfuralo)aminonorbornane; N-(2-Acetylfurano)aminonorbornane; N-(2-Hydroxyacetophenono)aminonorbornane; N-(Pyridoxalo)aminonorbornane; (Salicylaldehydo)anisidine; 2-salicylideneiminobenzothiazole; (Salicylaldehydo)sulfamethazine; and N′-histidine-3-methoxysalicylidenimine (V-his); N-(o-carboxybenzaldehydo)-2-aminophenol; N-(salicylaldehydo)isatin; N-(2-furfuralo)isatin; N-(2-acetylfurano)isatin; N-(pyridoxalo)isatin; N-(2-hydroxyacetophenono)isatin; hydrofuramide; 2-furancarboxaldehyde phenylhydrazone; 2-furancarboxaldehyde 2-pyridyl hydrazone; salicylaldehyde phenylhydrazone; and salicylaldehyde 2-pyridyl hydrazone. Also includes hydrazones with ortho-O substitution.

N—O Valence Stabilizer #38: Examples of Schiff Bases with two Imine (C═N) Groups and with ortho- or alpha- or beta-hydroxy or carboxy or carbonyl substitution (N—O Tridentates, N—O Tetradentates, N—O Pentadentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-(2,5-Furandicarboxaldehydo)diisopropylamine; N,N′-(2,5-Furandicarboxaldehydo)dicyclohexylamine; N,N′-(2,5-Furandicarboxaldehydo)dianiline; N,N′-(2,5-Furandicarboxaldehydo)di-aminonorbornane; N,N′-(o-Hydroxyphthalicdialdehydo)diisopropylamine; N,N′-(o-Hydroxyphthalicdialdehydo)dicyclohexylamine; N,N′-(o-Hydroxyphthalicdialdehydo)dianiline; N,N′-(o-Hydroxyphthalicdialdehydo)di-aminonorbornane; N,N′-(o-Hydroxyformylcamphoro)diisopropylamine; N,N′-(o-Hydroxyformylcamphoro)dicyclohexylamine; N,N′-(o-Hydroxyformylcamphoro)dianiline; N,N′-(o-Hydroxyformylcamphoro)di-aminonorbornane; N,N′-(o-Hydroxydiacetylbenzeno)diisopropylamine; N,N′-(o-Hydroxydiacetylbenzeno)dicyclohexylamine; N,N′-(o-Hydroxydiacetylbenzeno)dianiline; N,N′-(o-Hydroxydiacetylbenzeno)di-aminonorbornane; N,N′-(3,6-Dihydroxy-1,2-cyclohexanono)diisopropylamine; N,N′-(3,6-Dihydroxy-1,2-cyclohexanono)dicyclohexylamine; N,N′-(3,6-Dihydroxy-1,2-cyclohexanono)dianiline; N,N′-(3,6-Dihydroxy-1,2-cyclohexanono)di-aminonorbornane; N,N′-(2,5-Diacetylfurano)diisopropylamine; N,N′-(2,5-Diacetylfurano)dicyclohexylamine; N,N′-(2,5-Diacetylfurano)dianiline; N,N′-(2,5-Diacetylfurano)di-aminonorbornane; N,N′-(Salicylaldehydo)ethylenediamine; N,N′-(o-Hydroxynaphthaldehydo)ethylenediamine; N,N′-(o-Hydroxyacetophenono)ethylenediamine; N,N′-(Salicylaldehydo)trimethylenediamine; N,N′-(o-Hydroxynaphthaldehydo)trimethylenediamine; N,N′-(o-Hydroxyacetophenono)trimethylenediamine; N,N′-(Salicylaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Hydroxynaphthaldehydo)cyclohexane-1,2-diamine; N,N′-(o-Hydroxyacetophenono)cyclohexane-1,2-diamine; N,N′-(Salicylaldehydo)-1,2-diaminobenzene; N,N′-(o-Hydroxynaphthaldehydo)-1,2-diaminobenzene; N,N′-(o-Hydroxyacetophenono)-1,2-diaminobenzene; N,N′-bis(salicylaldehydo)-1,12-diaminododecane (Saldn); N,N′-bis(3-methoxysalicylaldehydo)-o-phenyldiamine; N,N′-bis(3,4-difluorobenzaldehydo)-4,4′-benzidine; and N,N′-phenylenebis(3-methoxysalicylidenimine) (V-ph-V). Also includes hydrazones with ortho-O substitution.

N—O Valence Stabilizer #39: Examples of Schiff Bases with three Imine (C═N) Groups and with ortho- or alpha- or beta-hydroxy or carboxy or carbonyl substitution (N—O Tetradentates, N—O Pentadentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′,N′′-(Salicylaldehydo)tris(2-aminoethyl)amine; N,N′,N′′-(o-Hydroxynaphthaldehydo)tris(2-aminoethyl)amine; and N,N′,N′′-(o-Hydroxyacetophenono)tris(2-aminoethyl)amine. Also includes hydrazones with ortho-O substitution.

N—O Valence Stabilizer #40: Examples of silylaminoalcohols (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: silatranes.

N—O Valence Stabilizer #41: Examples of hydroxyalkyl imines (imino alcohols) (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxycyclohexylimine; 3-hydroxy-2-iminonorbornane; 2,2′-diiminodicyclohexyl ether; oxamide; 3-imino-1,5-pentanedialdehyde; iminodiacetic acid; and iminodipropionic acid.

N—O Valence Stabilizer #42: Examples of hydroxyaryl amines and hydroxyaryl imines (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminophenol; 2-aminobenzoic acid (anthranilic acid); 2-aminoanisole; o-phenetidine; o-anisidine; 2-hydroxymethyl)-alpha-aminotoluene; 1-amino-2-naphthol; 2-amino-1-naphthol; 2,2′-di(aminomethyl)diphenylketone; isophoronediamine; tris-2,4,6-dimethylaminomethyl phenol; di(2-amino)phenyl ether; 1,3-di(2-amino)phenyl-2-hydroxypropane; 1,3-di(3-amino)phenyl-2-hydroxypropane; 1,3-di(2-hydroxy)phenyl-2-aminopropane; 1,3-di(3-hydroxy)phenyl-2-aminopropane; 2,2′-dihydroxyiminodibenzyl; 2,2′-iminodibenzoic acid; 2,2′-dihydroxyiminostilbene; poly(o-phenetidine); poly(o-aminophenol); poly(o-anisidine); and 3-(anilino)propionamide.

N—O Valence Stabilizer #43: Examples of five-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional oxygen atom binding site not in a ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxypyrrole; 2-(methylhydroxy)methylpyrrole; 2,5-(hydroxymethyl)pyrrole; 2,5-(methylhydroxymethyl)pyrrole; imidazoline-2-one (2-hydroxyimidazole); 2-hydroxythiazoline; 2-hydroxybenzimidazole; 2-hydroxybenzothiazole; 2-hydroxybenzoxazole; 2-hydantoin; di-2-pyridylglyoxal (2,2′-pyridil); bis((1-pyrazolyl)methane)ether; bis(2-(1-pyrazolyl)ethane)ether; bis(benzimidazolylmethane)ether; bis(benzimidazolylethane)ether; tris(imidazolyl)methanol; tris(imidazolylmethane)methanol; N-hydroxymethyl-N,N-(benzimidazolylmethane)amine; N-(2-hydroxyethyl)-N,N-(benzimidazolylmethane)amine; N,N′-di(benzimidazolylmethane)-1,3-diamino-2-hydroxypropane; N,N,N′,N′-tetrakis(benzimidazolylmethane)-1,3-diamino-2-hydroxypropane; bis(N,N-((4-imidazolyl)methane)-2-aminoethane)ether; 4-carboxybenzotriazole; antipyrine; 4-aminoantipyrine (aap); hydantoin; aminoalkylhydantoins; 2,5-oxazolidinedione; benzyldibenzoyltriazole (bdbt); 5-hydroxymethylimidazole; dicarboxyalkylbenzotriazoles; bis(hydroxyphenyl)aminotriazoles; pyrrole-2-carboxaldehyde; (oxopyrrolidinylalkyl)triazoles; alkoxybenzotriazoles; aryloxybenzotriazoles; 3-salicylamido-4,5-dihydro-1,2,4-triazole; 5-(alkoxy)benzotriazole; (polyoxyalkylene)oxazolidines; 1-(dialkylaminomethyl)-5-carboxyalkylbenzotriazole; 1-(2-hydroxyethyl)imidazoline; 1-acetoxyimidazole; 1-acetylimidazole; benzotriazolecarboxylic acid; poly(oxyalkylated)pyrazoles; poly(oxyalkylated)thiadiazoles; 1,2,4-triazole-3-carboxylic acid; 5-hydroxypyrazole; 3-phenyl-1,2,4-triazol-5-one (ptr); 1-acetylbenzimidazole; 1-[(acetoxy)ethyl]benzimidazole; creatinine; indole-2-carboxylic acid; pyrrole-2-carboxylic acid; imidazole-2-carboxylic acid; pyrazole-2-carboxylic acid; and 1,1′-oxalyldiimidazole.

N—O Valence Stabilizer #44: Examples of six-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional oxygen atom binding site not in a ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-aminomethyl-3-pyridinemethanol (including pyridoxamine); 2-hydroxypyridine; 2-(methylhydroxy)methylpyridine; 2-(2-(methylhydroxy)ethyl)pyridine; 2,6-(hydroxymethyl)pyridine; 2,6-(methylhydroxymethyl)pyridine; 2-hydroxypyrimidine; 2-dihydroxymethylpyrimidine; 2-hydroxyquinoline; 8-hydroxyquinoline (oxine); 8-methylhydroxyquinoline; 2-hydroxyquinazoline; orotic acid (1,2,3,6-tetrahydro-2,6-dioxo-4-pyrimidinecarboxylic acid) (6-uracilcarboxylic acid); 1-methylpyrimidine-2-one; uracil; 6-hydroxypurine; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminomethane)ether; bis(N,N,N′,N′-tetra(2-(2-pyridyl)ethane)aminoethane)ether; quinazol-4-one; quinazol-2-one; 5-azathymine; 2-hydroxybenzimidazole (2-hbz); guanine; 1,3,5-triazin-6-one; 6-hydroxy-1,3,5-triazine; 4,6-dihydroxy-1,3,5-triazine; triazine carboxylic acids; 2,3-dihydroxypyridine; thiomorpholin-3-one; hydroxytetrahydropyrimidines; 2-piperazinones; 2-piperidinones; dilituric acid; actinoquinol; caffeine; citrazinic acid; picolinic acid; 2-quinolol; 2,6-dimethoxypyridine; quinoxaline-2-carboxylic acid; flucytosine; hypoxanthine; hexamethylolmelamine; hydroorotic acid; isoorotic acid; xanthine; leucopterin; nitroorotic acid; 8-azaguanine; and cyanuric acid.

N—O Valence Stabilizer #45: Examples of five-membered heterocyclic rings containing one or two oxygen atoms at least one additional nitrogen atom binding site not in a ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminofuran; 2,5-diaminofuran; 2-aminomethylfuran; 2,5-di(aminomethyl)furan; 2-aminobenzofuran; and 2-amino-1,3-dioxolane.

N—O Valence Stabilizer #46: Examples of six-membered heterocyclic rings containing one or two oxygen atoms at least one additional nitrogen atom binding site not in a ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminopyran; 2,6-diaminopyran; 2-aminomethylpyran; 2,6-di(aminomethyl)pyran; and 2-aminobenzopyran.

N—O Valence Stabilizer #47: Examples of five-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional oxygen atom binding site in a separate ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-furan)pyrrole; 2,5-di(2-furan)pyrrole; 2-(2-pyran)pyrrole; 2,5-di(2-pyran)pyrrole; 2,5-di(2-pyrrole)furan; and 2,6-di(2-pyrrole)pyran.

N—O Valence Stabilizer #48: Examples of six-membered heterocyclic rings containing one, two, three, or four nitrogen atoms at least one additional oxygen atom binding site in a separate ring (N—O Bidentates, N—O Tridentates, N—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-furan)pyridine; 2,6-di(2-furan)pyridine; 2-(2-pyran)pyridine; 2,6-di(2-pyran)pyridine; 2,5-di(2-pyridyl)furan; 2,6-di(2-pyridyl)pyran; and drometrizole.

N—O Valence Stabilizer #49: Examples of two-, three-, four-, six-, eight-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) or oxygen (usually hydroxy, carboxy, or carbonyl groups) and are not contained in component heterocyclic rings (N—O Bidentates, N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azaoxacyclobutane ([4]aneNO); azaoxacyclopentane ([5]aneNO); azaoxacyclohexane ([6]aneNO); azaoxacycloheptane ([7]aneNO); azaoxacyclooctane ([8]aneNO); azaoxacyclobutene ([4]eneNO); azaoxacyclopentene ([5]eneNO); azaoxacyclohexene ([6]eneNO); azaoxacycloheptene ([7]eneNO); azaoxacyclooctene ([8]eneNO); azaoxacyclobutadiene ([4]dieneNO); azaoxacyclopentadiene ([5]dieneNO); azaoxacyclohexadiene ([6]dieneNO); azaoxacycloheptadiene ([7]dieneNO); azaoxacyclooctadiene ([8]dieneNO); diazaoxacyclohexane ([6]aneON2); diazaoxacycloheptane ([7]aneON2); diazaoxacyclooctane ([8]aneON2); diazaoxacyclononane ([9]aneON2); diazaoxacyclodecane ([10]aneON2); diazaoxacycloundecane ([11]aneON2); diazaoxacyclododecane ([12]aneON2); diazaoxacyclohexene ([6]eneON2); diazaoxacycloheptene ([7]eneON2); diazaoxacyclooctene ([8]eneON2); diazaoxacyclononene ([9]eneON2); diazaoxacyclodecene ([10]eneON2); diazaoxacycloundecene ([11]eneON2); diazaoxacyclododecene ([12]eneON2); diazadioxacyclooctane ([8]aneO2N2); diazadioxacyclononane ([9]aneO2N2); diazadioxacyclodecane ([10]aneO2N2); diazadioxacycloundecane ([11]aneO2N2); diazadioxacyclododecane ([12]aneO2N2); diazadioxacyclotridecane ([13]aneO2N2); diazadioxacyclotetradecane ([14]aneO2N2); diazadioxacyclopentadecane ([15]aneO2N2); diazadioxacyclohexadecane ([16]aneO2N2); diazadioxacycloheptadecane ([17]aneO2N2); diazadioxacyclooctadecane ([18]aneO2N2); diazadioxacyclononadecane ([19]aneO2N2); diazadioxacycloeicosane ([20]aneO2N2); diazadioxacyclooctadiene ([8]dieneO2N2); diazadioxacyclononadiene ([9]dieneO2N2); diazadioxacyclodecadiene ([10]dieneO2N2); diazadioxacycloundecadiene ([11]dieneO2N2); diazadioxacyclododecadiene ([12]dieneO2N2); diazadioxacyclotridecadiene ([13]dieneO2N2); diazadioxacyclotetradecadiene ([14]dieneO2N2); diazadioxacyclopentadecadiene ([15]dieneO2N2); diazadioxacyclohexadecadiene ([16]dieneO2N2); diazadioxacycloheptadecadiene ([17]dieneO2N2); diazadioxacyclooctadecadiene ([18]dieneO2N2); diazadioxacyclononadecadiene ([19]dieneO2N2); and diazadioxacycloeicosadiene ([20]dieneO2N2).

N—O Valence Stabilizer #50: Examples of four-, six-, eight-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or oxygen and are contained in component heterocyclic rings (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dipyrandipyridines; difurandipyrroles; tripyrantripyridines; trifurantripyrroles; tetrapyrantetrapyridines; and tetrafurantetrapyrroles.

N—O Valence Stabilizer #51: Examples of four-, six-, eight-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or oxygen and are contained in a combination of heterocyclic rings and amine, imine, hydroxy, carboxy, or carbonyl groups (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azaoxatetraphyrins; diazadioxatetraphyrins; azaoxahexaphyrins; diazadioxahexaphyrins; and triazatrioxahexaphyrins.

S—O Valence Stabilizer #1: Examples of 1,3-monothioketones (monothio-beta-ketonates), 1,3,5-monothioketones, 1,3,5-dithioketones, bis(1,3-monothioketones), and poly(1,3-monothioketones) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexafluoropenta-2-thione-4-ketone; 1,3-diphenyl-1,3-propana-1-thione-3-ketone; benzoylthiopinacolone; cyclohexoylthiocyclohexoylmethane; diphenylpentanedithionate; tetramethylnonanedithionate; hexafluoroheptanedithionate; trifluoroheptanedithionate; 1-(2-thienyl)-butan-1-thione-3-ketone, 1- (2-naphthyl)-butan-1-thione-3-ketone, and trifluoroacetylthiocamphor.

S—O Valence Stabilizer #2: Examples of thiomalonamides (thiomalonodiamides), bis(thiomalonamides), and polythiomalonamides (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiomalonamide, N-phenylthiomalonamide, N-benzylthiomalonamide, N-pentafluorophenylthiomalonamide, N-cyclohexylthiomalonamide, N-norbornylthiomalonamide, N,N′-diphenylthiomalonamide, N,N′-dibenzylthiomalonamide, N,N′-dipentafluorophenylthiomalonamide, N,N′-dicyclohexylthiomalonamide, and N,N′-norbornylthiomalonamide.

S—O Valence Stabilizer #3: Examples of 2-thioacylacetamides, 2-acylthioacetamides, bis(2-thioacylacetamides), bis(2acylthioacetamides), poly(2-thioacylacetamides), and poly(2-Acylthioacetamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-acetothioacetamide, 2-thioacetoacetamide, N-phenyl-2-acetothioacetamide, N-pentafluorophenyl-2-acetothioacetamide, N-benzyl-2-acetothioacetamide, N-cyclohexyl-2-acetothioacetamide, N-norbornyl-2-acetothioacetamide, N-phenyl-2-benzothioacetamide, N-pentafluorophenyl-2-pentafluorobenzothioacetamide, and N-cyclohexyl-2-cyclohexothioacetamide.

S—O Valence Stabilizer #4: Examples of dithiodicarbonic diamides, bis(dithiodicarbonic diamides), and poly(dithiodicarbonic diamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodicarbonic diamide; N-phenyldithiodicarbonic diamide; N-pentafluorophenyldithiodicarbonic diamide; N-benzyldithiodicarbonic diamide; N-cyclohexyldithiodicarbonic diamide; N-norbornyldithiodicarbonic diamide; N,N′-diphenyldithiodicarbonic diamide; N,N′-dipentafluorophenyldithiodicarbonic diamide; N,N′-dibenzyldithiodicarbonic diamide; N,N′-dicyclohexyldithiodicarbonic diamide; and N,N′-dinorbornyldithiodicarbonic diamide.

S—O Valence Stabilizer #5: Examples of monothiohypophosphoric acids, bis(monothiohypophosphoric acids), poly(monothiohypophosphoric acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiohypophosphoric acid, methylmonothiohypophosphoric acid, isopropylmonothiohypophosphoric acid, tert-butylmonothiohypophosphoric acid, phenylmonothiohypophosphoric acid, pentafluorophenylmonothiohypophosphoric acid, benzylmonothiohypophosphoric acid, cyclohexylmonothiohypophosphoric acid, norbornylmonothiohypophosphoric acid, dimethylmonothiohypophosphoric acid, diisopropylmonothiohypophosphoric acid, di-tert-butylmonothiohypophosphoric acid, diphenylmonothiohypophosphoric acid, di-pentafluorophenylmonothiohypophosphoric acid, dibenzylmonothiohypophosphoric acid, dicyclohexylmonothiohypophosphoric acid, and dinorbornylmonothiohypophosphoric acid.

S—O Valence Stabilizer #6: Examples of monothiohypophosphoramides, bis(monothiohypophosphoramides), and poly(monothiohypophosphoramides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiohypophosphoramide, N-methylmonothiohypophosphoramide, N-isopropylmonothiohypophosphoramide, N-tert-butylmonothiohypophosphoramide, N-phenylmonothiohypophosphoramide, N-pentafluorophenylmonothiohypophosphoramide, N-benzylmonothiohypophosphoramide, N-cyclohexylmonothiohypophosphoramide, N-norbornylmonothiohypophosphoramide, N,N′′′-dimethylmonothiohypophosphoramide, N,N′′′-diisopropylmonothiohypophosphoramide, N,N′′′-di-tert-butylmonothiohypophosphoramide, N,N′′′-diphenylmonothiohypophosphoramide, N,N′′′-di-pentafluorophenylmonothiohypophosphoramide, N,N′′′-dibenzylmonothiohypophosphoramide, N,N′′′-dicyclohexylmonothiohypophosphoramide, and N,N′′′-dinorbornylmonothiohypophosphoramide.

S—O Valence Stabilizer #7: Examples of monothioimidodiphosphoric acids, monothiohydrazidodiphosphoric acids, bis(monothioimidodiphosphoric acids), bis(monothiohydrazidodiphosphoric acids), poly(monothioimidodiphosphoric acids), poly(monothiohydrazidodiphosphoric acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioimidodiphosphoric acid, methylmonothioimidodiphosphoric acid, isopropylmonothioimidodiphosphoric acid, tert-butylmonothioimidodiphosphoric acid, phenylmonothioimidodiphosphoric acid, pentafluorophenylmonothioimidodiphosphoric acid, benzylmonothioimidodiphosphoric acid, cyclohexylmonothioimidodiphosphoric acid, norbornylmonothioimidodiphosphoric acid, dimethylmonothioimidodiphosphoric acid, diisopropylmonothioimidodiphosphoric acid, di-tert-butylmonothioimidodiphosphoric acid, diphenylmonothioimidodiphosphoric acid, di-pentafluorophenylmonothioimidodiphosphoric acid, dibenzylmonothioimidodiphosphoric acid, dicyclohexylmonothioimidodiphosphoric acid, and dinorbornylmonothioimidodiphosphoric acid.

S—O Valence Stabilizer #8: Examples of monothioimidodiphosphoramides, monothiohydrazidodiphosphoramides, bis(monothioimidodiphosphoramides), bis(monothiohydrazidodiphosphoramides), poly(monothioimidodiphosphoramides), and poly(monothiohydrazidodiphosphoramides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioimidodiphosphoramide, N-methylmonothioimidodiphosphoramide, N-isopropylmonothioimidodiphosphoramide, N-tert-butylmonothioimidodiphosphoramide, N-phenylmonothioimidodiphosphoramide, N-pentafluorophenylmonothioimidodiphosphoramide, N-benzylmonothioimidodiphosphoramide, N-cyclohexylmonothioimidodiphosphoramide, N-norbornylmonothioimidodiphosphoramide, N,N′′′-dimethylmonothioimidodiphosphoramide, N,N′′′-diisopropylmonothioimidodiphosphoramide, N,N′′′-di-tert-butylmonothioimidodiphosphoramide, N,N′′′-diphenylmonothioimidodiphosphoramide, N,N′′′-di-pentafluorophenylmonothioimidodiphosphoramide, N,N′′′-dibenzylmonothioimidodiphosphoramide, N,N′′′-dicyclohexylmonothioimidodiphosphoramide, and N,N′′′-dinorbornylmonothioimidodiphosphoramide.

S—O Valence Stabilizer #9: Examples of monothiodiphosphoramides, bis(monothiodiphosphoramides), and poly(monothiodiphosphoramides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiodiphosphoramide, N-methylmonothiodiphosphoramide, N-isopropylmonothiodiphosphoramide, N-tert-butylmonothiodiphosphoramide, N-phenylmonothiodiphosphoramide, N-pentafluorophenylmonothiodiphosphoramide, N-benzylmonothiodiphosphoramide, N-cyclohexylmonothiodiphosphoramide, N-norbornylmonothiodiphosphoramide, N,N′′′-dimethylmonothiodiphosphoramide, N,N′′′-diisopropylmonothiodiphosphoramide, N,N′′′-di-tert-butylmonothiodiphosphoramide, N,N′′′-diphenylmonothiodiphosphoramide, N,N′′′-di-pentafluorophenylmonothiodiphosphoramide, N,N′′′-dibenzylmonothiodiphosphoramide, N,N′′′-dicyclohexylmonothiodiphosphoramide, and N,N′′′-dinorbornylmonothiodiphosphoramide.

S—O Valence Stabilizer #10: Examples of monothiodiphosphoric acids, bis(monothiodiphosphoric acids), poly(monothiodiphosphoric acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiodiphosphoric acid, methylmonothiodiphosphoric acid, isopropylmonothiodiphosphoric acid, tert-butylmonothiodiphosphoric acid, phenylmonothiodiphosphoric acid, pentafluorophenylmonothiodiphosphoric acid, benzylmonothiodiphosphoric acid, cyclohexylmonothiodiphosphoric acid, norbornylmonothiodiphosphoric acid, dimethylmonothiodiphosphoric acid, diisopropylmonothiodiphosphoric acid, di-tert-butylmonothiodiphosphoric acid, diphenylmonothiodiphosphoric acid, di-pentafluorophenylmonothiodiphosphoric acid, dibenzylmonothiodiphosphoric acid, dicyclohexylmonothiodiphosphoric acid, and dinorbornylmonothiodiphosphoric acid.

S—O Valence Stabilizer #11: Examples of monothiocarbamates, bis(monothiocarbamates), and poly(monothiocarbamates) (including N-hydroxymonothiocarbamates and N-mercaptomonothiocarbamates) (S—O Bidentates, S—O Tridentates, and S—O Tetradentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethylmonothiocarbamate (dmmtc); di(trifluorodimethyl)monothiocarbamate; diethylmonothiocarbamate (demtc); dipropylmonothiocarbamate; diisopropylmonothiocarbamate; dibutylmonothiocarbamate; ditertbutylmonothiocarbamate; dicyanamidomonothiocarbamate; diphenylmonothiocarbamate; di(pentafluorophenyl)monothiocarbamate; dibenzylmonothiocarbamate; dinaphthylmonothiocarbamate; dicyclohexylmonothiocarbamate; dinorbornylmonothiocarbamate; diadamantylmonothiocarbamate; pyrrolidinomonothiocarbamate (pyrmtc); piperidinomonothiocarbamate (pipmtc); morpholinomonothiocarbamate (mormtc); thiamorpholinomonothiocarbamate; 3-pyrrolinomonothiocarbamate; pyrrolomonothiocarbamate; oxazolomonothiocarbamate; isoxazolomonothiocarbamate; thiazolomonothiocarbamate; isothiazolomonothiocarbamate; indolomonothiocarbamate; carbazolomonothiocarbamate; pyrazolinomonothiocarbamate; imidazolinomonothiocarbamate; pyrazolomonothiocarbamate; imidazolomonothiocarbamate; indazolomonothiocarbamate; and triazolomonothiocarbamate.

Miscellaneous Valence Stabilizer #1: Examples of hydroxo and oxo functionalities that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: water (H2O); dioxygen (O2); oxide (O2−); hydroxide (OH−); peroxo groups (O22−); and superoxo groups (O2−).

As with the inorganic valence stabilizers, crosses between two or more organic stabilizers can be used. For example, in some instances it may be desirable to form a valence stabilizer out of a nitrogen-containing heterocyclic and an amine ligand. During the synthesis process, both of these materials will complex with the MnIII or MnIV ion to produce a mixed nitrogen heterocyclic/amine valence stabilizer compound from the pigment solution.
3c) Narrow Band Inorganic Valence Stabilizers
Additional valence stabilizers can be used in conjunction with the MnIII and MnIV ions for corrosion protection. However, these less typical stabilizers suffer from disadvantages that make their selection over the previously mentioned wide band valence stabilizers less desirable. For this reason, we term them “narrow band” valence stabilizers because of their limited applications. Narrow band stabilizers exhibit some limitation in their use when compared to wide band stabilizers. Narrow band inorganic stabilizers may be toxic or may complex MnIII or MnIV only with difficulty. These narrow band stabilizers include, but are not limited to, bismuthates, germanates, arsenates, and carbonates. For example, valence stabilizers using arsenate are less desirable because their inherent toxicity is very large (greater than PbIV or CrVI), although they may be very effective at inhibiting corrosion when used with MnIII. Arsenates could be used as MnIII valence stabilizers in situations where the toxicity of the pigment is not a factor in its use.
Modifications of wide band inorganic valence stabilizers can result in a complex with reduced corrosion inhibition. The central cavity of the heteropolymetallates can contain ions in addition to the desired MnIII or MnIV ion. For example, the use of silicomolybdates, phosphomolybdates, silicotungstates, and phosphotungstates is possible. In these MnIII- or MnIV-valence stabilizer complexes, Si+4 or P+5 ions also occupy the central cavity of the complex with the MnIII or MnIV ion. The inclusion of additional ions in the central cavity reduces the stability of the complex, and thereby leads to lower corrosion protection. Nonetheless, these complexes also demonstrate some corrosion inhibiting activity. The additional ions that can be included within the central cavity of the heteropolymetallates described above depend upon the size of the central cavity, which in turn depends upon the specific chemistry exhibited by an inorganic valence stabilizer (e.g., molybdate, tungstate, periodate, etc.) In general, these additional ions must also be small so as to ensure the stability of the formed MnIII- or MnIV-valence stabilized complex. Examples of small additional ions include, but are not limited to: B+3, Al+3, Si+4, P+5, Ti+4, V+5, V+4, Cr+6, Cr+3, Mn+2, Fe+3, Fe+2, Co+3, Co+2, Ni+2, Ni+3, Ni+4, Cu+2, Cu+3, Zn+2, Ga+3, Ge+4, As+5, As+3, Zr+4, and Ce+4.
Water-soluble precursors for these materials are desirable. Typically, the free acids (e.g., silicomolybdic acid, phosphotungstic acid, borotungstic acid, etc.) offer the most water-soluble precursors for these materials.
3d) Narrow Band Organic Valence Stabilizers
Narrow band organic valence stabilizers include those general classes of chemical compounds that result in MnIII- or MnIV-valence stabilizer compounds that are either less stable, more soluble in water, or more toxic than the wide band organic stabilizers.







TABLE 5







Narrow Band Organic Valence Stabilizers for the Mn+3 and Mn+4 Ions








General Structural Name



(Type of Organic)
Structural Representation





N Valence Stabilizer #1:
Macrocyclic ligands containing five, seven, or


Five-, Seven-, or Nine-Membered
nine nitrogen binding sites to valence stabilize


Macrocyclics, Macrobicyclics, and
the central metal ion. Can include other


Macropolycyclics (including Catapinands,
hydrocarbon or ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Nitrogen (usually amine or imine groups)
ligand and/or attached, uncoordinating


and are not contained in Component
hydrocarbons/rings may or may not have


Heterocyclic Rings (N—N Tridentates, N—N
halogen or polarizing or water-


Tetradentates, and N—N Hexadentates)
insolubilizing/solubilizing groups attached.


N Valence Stabilizer #2:
Macrocyclic ligands containing a total of five or


Five-, or Seven-Membered Macrocyclics,
seven five-membered heterocyclic rings


Macrobicyclics, and Macropolycyclics
containing nitrogen binding sites. Can include


(including Catapinands, Cryptands,
other hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Nitrogen
with the stabilized, high valence metal ion. This


and are contained in Component 5-
ligand and/or attached, uncoordinating


Membered Heterocyclic Rings (N—N
hydrocarbon/rings may or may not have halogen


Tridentates, N—N Tetradentates, or N—N
or polarizing or water-insolubilizing groups


Hexadentates)
attached.


N Valence Stabilizer #3:
Macrocyclic ligands containing at least one 5-


Five-, Seven-, or Nine-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide nitrogen binding sites


Macropolycyclics (including Catapinands,
to valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine or imine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Nitrogen and are contained in a
the total number of binding sites is five, seven,


Combination of 5-Membered Heterocyclic
or nine. Can include other hydrocarbon/ring


Rings and Amine or Imine Groups (N—N
systems bound to this macrocyclic ligand, but


Tridentates, N—N Tetradentates, or N—N
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


N Valence Stabilizer #4:
Macrocyclic ligands containing a total of five or


Five- or Seven-Membered Macrocyclics,
seven six-membered heterocyclic rings


Macrobicyclics, and Macropolycyclics
containing nitrogen binding sites. Can include


(including Catapinands, Cryptands,
other hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Nitrogen
with the stabilized, high valence metal ion. This


and are contained in Component 6-
ligand and/or attached, uncoordinating


Membered Heterocyclic Rings (N—N
hydrocarbon/rings may or may not have halogen


Tridentates, N—N Tetradentates, or N—N
or polarizing or water-insolubilizing groups


Hexadentates)
attached.


N Valence Stabilizer #5:
Macrocyclic ligands containing at least one 6-


Five-, Seven-, or Nine-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide nitrogen binding sites


Macropolycyclics (including Catapinands,
to valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine or imine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Nitrogen and are contained in a
the total number of binding sites is five, seven,


Combination of 6-Membered Heterocyclic
or nine. Can include other hydrocarbon/ring


Rings and Amine or Imine Groups (N—N
systems bound to this macrocyclic ligand, but


Tridentates, N—N Tetradentates, or N—N
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


N Valence Stabilizer #6:
N(SiR3)3, R′N(SiR3)2, or R′R′′N(SiR3) for


Silylamines and Silazanes, including
silylamines; and [RR′′Si—NR′]x (x = 1–10) for


Macrocyclic Derivatives, wherein at least
silazanes where R, R′, and R′′ represents H or


one Nitrogen Atom is a Binding Site (N
any organic functional group wherein the


Monodentates, N—N Bidentates, N—N
number of carbon atoms ranges from 0 to 35,


Tridentates, N—N Tetradentates, and N—N
optionally having halogen or polarizing or


Hexadentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding



N, P, As, O, S, or Se atoms.


N Valence Stabilizer #7:
RR′—N—C(═NH)NR′′R′′′, where R, R′, R′′, and


Guanidines, Diguanidines, and
R′′′ represent H or any organic functional group


Polyguanidines (N—N Bidentates, N—N
wherein the number of carbon atoms ranges


Tridentates, N—N Tetradentates, and N—N
from 0 to 40, optionally having halogen or


Hexadentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #8:
RR′—N—P(≡N)—N—R′′R′′′, where R, R′, R′′, and


Phosphonitrile Amides, and
R′′′ represent H or any organic functional group


Bis(phosphonitrile amides) (N—N
wherein the number of carbon atoms ranges


Bidentates, N—N Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #9:
(NH═)PR′′′′(—NRR′)(—NR′′R′′′), where R, R′,


Phosphonimidic Diamides,
R′′, R′′′, and R′′′′ represent H or any organic


Bis(Phosphonimidic Diamides), and
functional group wherein the number of carbon


Poly(Phosphonimidic Diamides) (N—N
atoms ranges from 0 to 40, optionally having


Bidentates, N—N Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #10:
(NH═)PR′′′(—NRR′)(—OR′′) for


Phosphonamidimidic Acid,
phosphonamidimidic acid and (NH═)PR′′′(—NRR′)(—SR′′)


Phosphonamidimidothioic Acid,
for phosphonamidimidothioic


Bis(Phosphonamidimidic Acid),
acid, where R, R′, R′′, and R′′′ represent H or


Bis(Phosphonamidimidothioic Acid),
any organic functional group wherein the


Poly(Phosphonamidimidic Acid),
number of carbon atoms ranges from 0 to 40,


Poly(Phosphonamidimidothioic Acid), and
optionally having halogen or polarizing or


derivatives thereof (N—N Bidentates, and N—N
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N Valence Stabilizer #11:
C5H5N—CR═NR′, where C5H5N is a pyridine


Pyridinaldimines, Bis(pyridinaldimines),
derivative, R is typically an aromatic constituent


and Poly(pyridinaldimines) (N—N
(i.e. —C6H5), and R′ represents H or any organic


Bidentates, N—N Tridentates, and N—N
functional group wherein the number of carbon


Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #12:
R—NH—N═R′, where R and R′ represent H or


Hydrazones, Bis(hydrazones), and
any organic functional group wherein the


Poly(hydrazones) (N Monodentates, N—N
number of carbon atoms ranges from 0 to 40,


Bidentates, N—N Tridentates, and N—N
optionally having halogen or polarizing or


Tetradentates)
water-insolubilizing/solubilizing groups



attached. (Either R or R′ is typically an aryl



group.) Ligand can also contain nonbinding N,



O, S, or P atoms.


N Valence Stabilizer #13:
R—N═N—R′ for azo compounds, R—N═N—NH—R′


Azo compounds including triazenes without
for triazenes, where R, and R′ represent H or


chelate substitution at the ortho-(for aryl)
any organic functional group wherein the


or alpha- or beta-(for alkyl) positions,
number of carbon atoms ranges from 0 to 40,


Bis(azo compounds), or Poly(azo
optionally having halogen or polarizing or


compounds) (N Monodentates, N—N
water-insolubilizing/solubilizing groups


Bidentates, or N—N—N Tridentates)
attached. (Not including ortho-chelate



substituted aryl azo compounds, and alpha- or



beta-substituted alkyl azo compounds.) Ligand



can also contain nonbinding N, O, S, or P



atoms.


N Valence Stabilizer #14:
R—N═N—CR′═N—NR′′R′′′, where R, R′, R′′, and


Formazans, Bis(formazans), and
R′′′ represent H, or any organic functional


Poly(formazans) without ortho-hydroxy,
group wherein the number of carbon atoms


carboxy, thiol, mercapto, amino, or
ranges from 0 to 40, optionally having halogen


hydrazido substitution (N—N Bidentates, N—N
or polarizing or water-


Tetradentates, and N—N Hexadentates)
insolubilizing/solubilizing groups attached. (Not



including ortho-hydroxy, carboxy, thiol,



mercapto, amino, or hydrazido substitution.)



Ligand can also contain nonbinding N, O, S, or



P atoms.


N Valence Stabilizer #15:
R—CH═N—CHR′—N═CHR′′, where R, R′, and R′′


Hydramides (N—N Bidentates)
represent H, or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. (R, R′, and R′′ are typically



aryl derivatives.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #16:
RR′C═N—N═CR′′R′′′ or RR′C═N—NR′′R′′′ (for


Azines (including ketazines), Bis(azines),
ketazines), where R, R′, R′′, and R′′′ represent


and Poly(azines) without ortho-hydroxy,
H, or any organic functional group wherein the


carboxy, thiol, mercapto, amino, or
number of carbon atoms ranges from 0 to 40,


hydrazido substitution (N—N Bidentates, N—N
optionally having halogen or polarizing or


Tetradentates, and N—N Hexadentates)
water-insolubilizing/solubilizing groups



attached. (Not including ortho-hydroxy,



carboxy, thiol, mercapto, amino, or hydrazido



substitution.) Ligand can also contain



nonbinding N, O, S, or P atoms.


N Valence Stabilizer #17:
RR′C═N—R′′, where R, R′, and R′′ represent H,


Schiff Bases with one Imine (C═N) Group
or any organic functional group wherein the


and without ortho-(for aryl constituents) or
number of carbon atoms ranges from 0 to 40,


alpha- or beta-(for alkyl constituents)
optionally having halogen or polarizing or


hydroxy, carboxy, carbonyl, thiol,
water-insolubilizing/solubilizing groups


mercapto, thiocarbonyl, amino, imino,
attached. (Not including ortho-, alpha-, or beta-


oximo, diazeno, or hydrazido substitution
hydroxy, carboxy, carbonyl, thiol, mercapto,


(N Monodentates)
thiocarbonyl, amino, imino, oximo, diazeno, or



hydrazido substitution.) Ligand can also



contain nonbinding N, O, S, or P atoms.


N Valence Stabilizer #18:
Isocyanides, cyanamides, and related ligands


Isocyanide and Cyanamide and related
where the nitrogen atom is directly complexed


ligands (N Monodentates)
to the high valence metal ion.


N Valence Stabilizer #19:
Nitrosyl, nitrite, and related ligands where the


Nitrosyl and Nitrite and related ligands (N
nitrogen atom is bound directly to the high


Monodentates)
valence metal ion.


N Valence Stabilizer #20:
R—CN, R—(CN)2, R—(CN)x, etc. where R


Nitriles, Dinitriles, and Polynitriles (N
represents H or any organic functional group


Monodentates, N—N Bidentates, and N—N—N
wherein the number of carbon atoms ranges


Tridentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


N Valence Stabilizer #21:
Azide (—N3) ligands bound directly to the high


Azide ligands (N Monodentates, or N—N
valence metal ion. Also includes organoazide


Bidentates)
derivatives (R—N3), triazenido compounds (R—N3—R′),



phosphonyl azides (R—PO2H—N3),



phosphoryl azides (O—PO2H—N3), and sulfonyl



azides (R—SO2—N3) where R and R′ represent H



or any organic functional group wherein the



number of carbon atoms ranges from 0 to 35,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached


S Valence Stabilizer #1:
SH2, SHR, SR2, where R represents H or any


Monothioethers (S Monodentates) wherein
organic functional group wherein the number of


at least one Sulfur Atom is a Binding Site
carbon atoms ranges from 0 to 35, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


S Valence Stabilizer #2:
R—S—S—R′, where R and R′ represents H or any


Disulfides (S Monodentates) wherein at
organic functional group wherein the number of


least one Sulfur Atom is a Binding Site
carbon atoms ranges from 0 to 35, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


S Valence Stabilizer #3:
R—S—R′—S—R′′, where R, R′, and R′′ represents H


Dithioethers (S—S Bidentates) wherein at
or any organic functional group wherein the


least one Sulfur Atom is a Binding Site
number of carbon atoms ranges from 0 to 35,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, O, S, or Se atoms.


S Valence Stabilizer #4:
R—S—R′—S—R′′—S—R′′′, where R, R′, R′′, and R′′′


Trithioethers (S—S Bidentates or S—S
represents H or any organic functional group


Tridentates) wherein at least one Sulfur
wherein the number of carbon atoms ranges


Atom is a Binding Site
from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, P, O, S, or Se atoms.


S Valence Stabilizer #5:
R—S—R′—S—R′′—S—R′′′—S—R′′′′, where R, R′, R′′,


Tetrathioethers (S—S Bidentates, S—S
R′′′, and R′′′′ represents H or any organic


Tridentates, or S—S Bidentates) wherein at
functional group wherein the number of carbon


least one Sulfur Atom is a Binding Site
atoms ranges from 0 to 35, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


S Valence Stabilizer #6:
R—S—R′—S—R′′—S—R′′′—S—R′′′′—S—R′′′′′—S—R—′′′′′′,


Hexathioethers (S—S Bidentates, S—S
where R, R′, R′′, R′′′, R′′′′, R′′′′′, and R′′′′′′


Tridentates, S—S Tetradentates, or S—S
represents H or any organic functional group


Hexadentates) wherein at least one Sulfur
wherein the number of carbon atoms ranges


Atom is a Binding Site
from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, P, O, S, or Se atoms.


S Valence Stabilizer #7:
Five membered heterocyclic ring containing one


Five-Membered Heterocyclic Rings
or two sulfur atoms, both of which may function


containing One or Two Sulfur Atoms
as binding sites. Can include other ring systems


wherein at least one Sulfur Atom is a
bound to this heterocyclic ring, but they do not


Binding Site (S Monodentates or S—S
coordinate with the stabilized, high valence


Bidentates)
metal ion. Ring can also contain O, N, P, As, or



Se atoms. This 5-membered ring and/or



attached, uncoordinating rings may or may not



have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #8:
Six membered heterocyclic ring containing just


Six-Membered Heterocyclic Rings
one or two sulfur atoms, both of which may


containing One or Two Sulfur Atoms
function as binding sites. Can include other


wherein at least one Sulfur Atom is a
ring systems bound to this heterocyclic ring, but


Binding Site (S Monodentates or S—S
they do not coordinate with the stabilized, high


Bidentates)
valence metal ion. Ring can also contain O, N,



P, As, or Se atoms. This 5-membered ring



and/or attached, uncoordinating rings may or



may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #9:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional sulfur-containing


least one additional Sulfur Atom Binding
substituents (usually thiols or thioethers) that


Site not in a Ring (S Monodentates, S—S
constitute S binding sites. Can include other


Bidentates, S—S Tridentates, S—S
ring systems bound to the heterocyclic ring or to


Tetradentates, or S—S Hexadentates)
the S-containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, N, P, As



or Se atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #10:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional sulfur-containing


least one additional Sulfur Atom Binding
substituents (usually thiols or thioethers) that


Site not in a Ring (S Monodentates, S—S
constitute S binding sites. Can include other


Bidentates, S—S Tridentates, S—S
ring systems bound to the heterocyclic ring or to


Tetradentates, or S—S Hexadentates)
the S-containing substituent, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, N, P, As



or Se atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #11:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional sulfur-containing rings that


least one additional Sulfur Atom Binding
constitute S binding sites. Can include other


Site in a separate Ring (S Monodentates, S—S
ring systems bound to the S-containing


Bidentates, S—S Tridentates, S—S
heterocyclic rings, but they do not coordinate


Tetradentates, or S—S Hexadentates)
with the stabilized, high valence metal ion.



Ring(s) can also contain O, N, P, As, or Se



atoms. This 5-membered ring(s) and/or



additional S-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #12:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two sulfur atoms. In addition, ligand


containing One or Two Sulfur Atoms at
contains additional sulfur-containing rings that


least one additional Sulfur Atom Binding
constitute S binding sites. Can include other


Site in a separate Ring (S Monodentates, S—S
ring systems bound to the S-containing


Bidentates, S—S Tridentates, S—S
heterocyclic rings, but they do not coordinate


Tetradentates, or S—S Hexadentates)
with the stabilized, high valence metal ion.



Ring(s) can also contain O, N, P, As, or Se



atoms. This 6-membered ring(s) and/or



additional S-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S Valence Stabilizer #13:
Macrocyclic ligands containing two to ten sulfur


Two-, Three-, Four-, Five-, Six-, Seven-,
binding sites to valence stabilize the central


Eight-, Nine-, and Ten-Membered
metal ion. Can include other hydrocarbon or


Macrocyclics, Macrobicyclics, and
ring systems bound to this macrocyclic ligand,


Macropolycyclics (including Catapinands,
but they do not coordinate with the stabilized,


Cryptands, Cyclidenes, and Sepulchrates)
high valence metal ion. This ligand and/or


wherein all Binding Sites are composed of
attached, uncoordinating hydrocarbons/rings


Sulfur (usually thiol or thioether groups)
may or may not have halogen or polarizing or


and are not contained in Component
water-insolubilizing/solubilizing groups


Heterocyclic Rings (S—S Bidentates, S—S
attached.


Tridentates, S—S Tetradentates, and S—S


Hexadentates)


S Valence Stabilizer #14:
Macrocyclic ligands containing a total of four to


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
ten five-membered heterocyclic rings containing


Ten-Membered Macrocyclics,
sulfur binding sites. Can include other


Macrobicyclics, and Macropolycyclics
hydrocarbon/ring systems bound to this


(including Catapinands, Cryptands,
macrocyclic ligand, but they do not coordinate


Cyclidenes, and Sepulchrates) wherein all
with the stabilized, high valence metal ion. This


Binding Sites are composed of Sulfur and
ligand and/or attached, uncoordinating


are contained in Component 5-Membered
hydrocarbon/rings may or may not have halogen


Heterocyclic Rings (S—S Tridentates, S—S
or polarizing or water-insolubilizing groups


Tetradentates or S—S Hexadentates)
attached.


S Valence Stabilizer #15:
Macrocyclic ligands containing at least one 5-


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
membered heterocyclic ring. These


Ten-Membered Macrocyclics,
heterocyclic rings provide sulfur binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
thiol, thioether, or thioketo binding sites can


Cyclidenes, and Sepulchrates) wherein all
also be included in the macrocyclic ligand, so


Binding Sites are composed of Sulfur and
long as the total number of binding sites is four


are contained in a Combination of 5-
to ten. Can include other hydrocarbon/ring


Membered Heterocyclic Rings and Thiol,
systems bound to this macrocyclic ligand, but


Thioether, or Thioketo Groups (S—S
they do not coordinate with the stabilized, high


Tridentates, S—S Tetradentates, or S—S
valence metal ion. This ligand and/or attached,


Hexadentates)
uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


S Valence Stabilizer #16:
Macrocyclic ligands containing a total of four to


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
ten six-membered heterocyclic rings containing


Ten-Membered Macrocyclics,
sulfur binding sites. Can include other


Macrobicyclics, and Macropolycyclics
hydrocarbon/ring systems bound to this


(including Catapinands, Cryptands,
macrocyclic ligand, but they do not coordinate


Cyclidenes, and Sepulchrates) wherein all
with the stabilized, high valence metal ion. This


Binding Sites are composed of Sulfur and
ligand and/or attached, uncoordinating


are contained in Component 6-Membered
hydrocarbon/rings may or may not have halogen


Heterocyclic Rings (S—S Tridentates, S—S
or polarizing or water-insolubilizing groups


Tetradentates, or S—S Hexadentates)
attached.


S Valence Stabilizer #17:
Macrocyclic ligands containing at least one 6-


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
membered heterocyclic ring. These


Ten-Membered Macrocyclics,
heterocyclic rings provide sulfur binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
thiol, thioether, or thioketo binding sites can


Cyclidenes, and Sepulchrates) wherein all
also be included in the macrocyclic ligand, so


Binding Sites are composed of Sulfur and
long as the total number of binding sites is four


are contained in a Combination of 6-
to ten. Can include other hydrocarbon/ring


Membered Heterocyclic Rings and Thiol,
systems bound to this macrocyclic ligand, but


Thioether, or Thioketo Groups (S—S
they do not coordinate with the stabilized, high


Tridentates, S—S Tetradentates, or S—S
valence metal ion. This ligand and/or attached,


Hexadentates)
uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


S Valence Stabilizer #18:
RR′—N—C(═S)—NR′′—C(═S)-NR′′′R′′′′ for


Dithiobiurets (Dithioimidodicarbonic
dithiobiurets, and RR′—N—C(═S)—NR′′—NH—C(═S)—NR′′′R′′′′


Diamides), Dithioisobiurets, Dithiobiureas,
for dithiobiureas, where R, R′,


Trithiotriurets, Trithiotriureas,
R′′, R′′′, and R′′′′ represent H, NH2, or any


Bis(dithiobiurets), Bis(dithioisobiurets),
organic functional group wherein the number of


Bis(dithiobiureas), Poly(dithiobiurets),
carbon atoms ranges from 0 to 40, optionally


Poly(dithioisobiurets), and
having halogen or polarizing or water-


Poly(dithiobiureas) (S—S Bidentates, S—S
insolubilizing/solubilizing groups attached.


Tridentates, S—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #19:
RR′—N—C(═S)—NR′′—C(═S)—R′′′ where R, R′, R′′,


Thioacylthioureas, Thioaroylthioureas,
and R′′′ represent H, NH2, or any organic


Bis(thioacylthioureas),
functional group wherein the number of carbon


Bis(thioaroylthioureas),
atoms ranges from 0 to 40, optionally having


Poly(thioacylthioureas), and
halogen or polarizing or water-


Poly(thioaroylthioureas) (S—S Bidentates, S—S
insolubilizing/solubilizing groups attached.


Tridentates, S—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #20:
R—C(═S)—S—S—C(═S)—R′ where R, and R′


Dithioacyl disulfides, Bis(dithioacyl
represent H or any organic functional group


disulfides), and Poly(dithioacyl disulfides)
wherein the number of carbon atoms ranges


(S—S Bidentates, S—S Tridentates, S—S
from 0 to 40, optionally having halogen or


Tetradentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


S Valence Stabilizer #21:
RR′—N—C(═S)—S—S—C(═S)—N—R′′R′′′ where R, R′,


Tetrathioperoxydicarbonic Diamides,
R′′, R′′′ represent H or any organic functional


Bis(tetrathioperoxydicarbonic diamides),
group wherein the number of carbon atoms


and poly(tetrathioperoxydicarbonic
ranges from 0 to 40, optionally having halogen


diamides) (S—S Bidentates, S—S Tridentates,
or polarizing or water-


S—S Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #22:
R—S—C(═S)—S—S—C(═S)—S—R′ for


Hexathio-, Pentathio-, and
hexathioperoxydicarbonic acids, R—O—C(═S)—S—S—C(═S)—S—R′


Tetrathioperoxydicarbonic Acids,
for pentathioperoxydicarbonic


Bis(hexathio-, pentathio-, and
acids, and R—O—C(═S)—S—S—C(═S)—O—R′ for


tetrathioperoxydicarbonic acids),
tetrathioperoxydicarbonic acids, where R and R′


poly(hexathio-, pentathio-, and
represent H, NH2 or any organic functional


tetrathioperoxydicarbonic acids), and
group wherein the number of carbon atoms


derivatives thereof (S—S Bidentates, S—S
ranges from 0 to 40, optionally having halogen


Tridentates, S—S Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #23:
(RR′—N—)(R′′R′′′—N—)P(═S)—S—S—P(═S)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Dithioperoxydiphosphoramide,
where R, R′, R′′, R′′′,


Bis(dithioperoxyphosphoramide), and
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Poly(dithioperoxydiphosphoramide) (S—S
any organic functional group wherein the


Bidentates, S—S Tridentates, S—S
number of carbon atoms ranges from 0 to 40,


Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #24:
(R—O—)(R′—O—)P(═S)—S—S—P(═S)(—O—R′′)(—O—R′′′);


Dithioperoxydiphosphoric Acids,
(R—O—)(R′—S—)P(═S)—S—S—P(═S)(—S—R′′)(—O—R′′′);


Bis(dithioperoxyphosphoric Acids),
or (R—S—)(R′—S—)P(═S)—S—S—P(═S)(—S—R′′)(—S—R′′′),


Poly(dithioperoxydiphosphoric Acids), and
where R, R′, R′′, R′′′, R′′′′, R′′′′′, R′′′′′′,


derivatives thereof (S—S Bidentates, S—S
and R′′′′′′′ represent H, NH2 or any organic


Tridentates, S—S Tetradentates)
functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #25:
(R—O—)(R′—)P(═S)—NH—P(═S)(—R′′)(—O—R′′′);


Dithioimidodiphosphonic Acids,
(R—S—)(R′—)P(═S)—NH—P(═S)(—R′′)(—O—R′′′);


Dithiohydrazidodiphosphonic Acids,
or (R—S—)(R′—)P(═S)—NH—P(═S)(—R′′)(—S—R′′′)


Bis(dithioimidodiphosphonic acids),
for dithioimidodiphosphonic


Bis(dithiohydrazidodiphosphonic acids),
acids, and —NH—NH-


Poly(dithioimidodiphosphonic acids),
derivatives for dithiohydrazidodiphosphonic


Poly(dithiohydrazidodiphosphonic acids),
acids, where R, R′, R′′, and R′′′ represent H,


and derivatives thereof (S—S Bidentates, S—S
NH2 or any organic functional group wherein


Tridentates, and S—S Tetradentates)
the number of carbon atoms ranges from 0 to



40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #26:
(RR′—N—)(R′′—)P(═S)—NH—P(═S)(—R′′′)(—N—R′′′′R′′′′′)


Dithioimidodiphosphonamides,
for dithioimidophosphonamides, and


Dithiohydrazidodiphosphonamides,
(RR′—N—)(R′′—)P(═S)—NH—NH—P(═S)(—R′′′)(—N—R′′′′R′′′′′)


Bis(dithioimidodiphosphonamides),
for dithiohydrazidodiphosphonamides,


Bis(dithiohydrazidodiphosphonamides),
where R, R′,R′′, R′′′,


Poly(dithioimidodiphosphonamides), and
R′′′′, and R′′′′′ represent H, NH2 or any


Poly(dithiohydrazidodiphosphonamides)
organic functional group wherein the number of


(S—S Bidentates, S—S Tridentates, S—S
carbon atoms ranges from 0 to 40, optionally


Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #27:
(RR′—N—)(R′′—)P(═S)—S—P(═S)(—R′′′)(—N—R′′′′R′′′′′),


Dithiodiphosphonamides,
or (RR′—N—)(R′′—)P(═S)—O—P(═S)(—R′′′)(—N—R′′′′R′′′′′),


Bis(dithiophosphonamides), and
where R, R′, R′′, R′′′, R′′′′,


Poly(dithiodiphosphonamides) (S—S
and R′′′′′ represent H, NH2 or any organic


Bidentates, S—S Tridentates, S—S
functional group wherein the number of carbon


Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #28:
(R—O—)(R′—)P(═S)—O—P(═S)(—R′′)(—O—R′′′);


Dithiodiphosphonic Acids,
(R—O—)(R′—)P(═S)—S—P(═S)(—R′′)(—O—R′′′);


Bis(dithioiphosphonic Acids),
(R—S—)(R′—)P(═S)—O—P(═S)(—R′′)(—S—R′′′);


Poly(dithiodiphosphonic Acids), and
or (R—S—)(R′—)P(═S)—S—P(═S)(—R′′)(—S—R′′′);


derivatives thereof (S—S Bidentates, S—S
where R, R′, R′′,


Tridentates, S—S Tetradentates)
and R′′′ represent H, NH2 or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #29:
(RR′—N—)(R′′—)P(═S)—S—S—P(═S)(—R′′′)(—N—R′′′′R′′′′′),


Dithioperoxydiphosphonamide,
where R, R′, R′′, R′′′, R′′′′, and R′′′′′


Bis(dithioperoxyphosphonamide), and
represent H, NH2 or any organic functional


Poly(dithioperoxydiphosphonamide) (S—S
group wherein the number of carbon atoms


Bidentates, S—S Tridentates, S—S
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #30:
(R—O—)(R′—)P(═S)—S—S—P(═S)(—R′′)(—O—R′′′); or


Dithioperoxydiphosphonic Acids,
(R—S—)(R′—)P(═S)—S—S—P(═S)(—R′′)(—S—R′′′),


Bis(dithioperoxyphosphonic Acids),
where R, R′, R′′, and R′′′ represent H, NH2 or


Poly(dithioperoxydiphosphonic Acids), and
any organic functional group wherein the


derivatives thereof (S—S Bidentates, S—S
number of carbon atoms ranges from 0 to 40,


Tridentates, S—S Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #31: Dithiophosphonic
(O═)PR(—S —R′)(—S—R′′) or (S═)PR(—S—R′)(—O—R′′),


Acids (Phosphonodithioic Acids),
where R, R′, and R′′ represent H, NH2 or


Bis(dithiophosphonic Acids),
any organic functional group wherein the


Poly(dithiophosphonic Acids), and
number of carbon atoms ranges from 0 to 40,


derivatives thereof (S—S Bidentates, S—S
optionally having halogen or polarizing or


Tridentates, S—S Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #32:
(S═)PR(—S—R′)(—S—R′′), where R, R′, and R′′


Trithiophosphonic Acids
represent H, NH2 or any organic functional


(Phosphonotrithioic Acids),
group wherein the number of carbon atoms


Bis(trithiophosphonic Acids),
ranges from 0 to 40, optionally having halogen


Poly(trithiophosphonic Acids), and
or polarizing or water-


derivatives thereof (S—S Bidentates, S—S
insolubilizing/solubilizing groups attached.


Tridentates, S—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #33:
(O═)PR(—S—S—R′)(—S—R′′) or (S═)PR(—S—S—R′)(—O—R′′),


Phosphono(dithioperoxo)thioic Acids),
where R, R′, and R′′ represent H, NH2 or


Bis[phosphono(dithioperoxo)thioic Acids],
any organic functional group wherein the


Poly[phosphono(dithioperoxo)thioic
number of carbon atoms ranges from 0 to 40,


Acids], and derivatives thereof (S—S
optionally having halogen or polarizing or


Bidentates, S—S Tridentates, S—S
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #34:
(S═)PR(—S—S—R′)(—S—R′′), where R, R′, and R′′


Phosphono(dithioperoxo)dithioic Acids),
represent H, NH2 or any organic functional


Bis[phosphono(dithioperoxo)dithioic
group wherein the number of carbon atoms


Acids],
ranges from 0 to 40, optionally having halogen


Poly[phosphono(dithioperoxo)dithioic
or polarizing or water-


Acids], and derivatives thereof (S—S
insolubilizing/solubilizing groups attached.


Bidentates, S—S Tridentates, S—S
Ligand can also contain nonbinding N, O, S, or


Tetradentates)
P atoms.


S Valence Stabilizer #35:
R—S—R′CSOH or R—S—R′CSSH for S-


S-(Alkylthio)thiocarboxylic Acids, S-
(alkylthio)thiocarboxylic and S-


(Arylthio)thiocarboxylic Acids, and S,S-
(arylthio)thiocarboxylic acids, and HSOCR—S—R′COSH


thiobisthiocarboxylic Acids (S—S Bidentates
or HSSCR—S—R′CSSH for S,S-


and S—S Tridentates)
thiobisthiocarboxylic acids, where R and R′



represent H or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


S Valence Stabilizer #36:
R—S—S—R′CSOH or R—S—S—R′CSSH for S-


S-(Alkyldisulfido)thiocarboxylic Acids, S-
(alkyldisulfido)thiocarboxylic and S-


(Aryldisulfido)thiocarboxylic Acids, and
(aryldisulfido)thiocarboxylic acids, and


S,S′-Disulfidobisthiocarboxylic Acids (S—S
HSOCR—S—S—R′COSH or HSSCR—S—S—R′CSSH


Bidentates and S—S Tridentates)
for S,S′-disulfidobisthiocarboxylic acids, where



R and R′ represent H or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #37:
R—CH(—SR′′)—CH(—SR′′′)—R′, and R—C(—SR′′)═C(—SR′′′)—R′,


1,2-Dithiolates, Bis(1,2-dithiolates), and
where R, R′, R′′, and R′′′


Poly(1,2-dithiolates) (S—S Bidentates, S—S
represent H, NH2 or any organic functional


Tridentates, S—S Tetradentates)
group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #38:
RN—C(═O)—CHR′—S—C(═S) for rhodanines, and


Rhodanines and Bis(rhodanines) (S—S
R—[N—C(═O)—CHR′—S—C(═S)]2 for


Bidentates and S—S Tetradentates)
bis(rhodanines), where R and R′ represent H,



NH2 or any organic functional group wherein



the number of carbon atoms ranges from 0 to



40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #39:
RN═C(SH)(SH), where R represents H, NH2 or


Dithiocarbimates, Bis(dithiocarbimates),
any organic functional group wherein the


and Poly(dithiocarbimates) (S—S Bidentates,
number of carbon atoms ranges from 0 to 40,


S—S Tridentates, and S—S Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S Valence Stabilizer #40:
RS+═C(SH)(SH) or RS—C(═S)(SH), where R


Thioxanthates, Bis(thioxanthates), and
represents H, NH2 or any organic functional


Poly(thioxanthates) (S—S Bidentates and S—S
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #41:
RO+═C(SH)(SH) or RO—C(═S)(SH), where R


Xanthates, Bis(xanthates), and
represents H, NH2 or any organic functional


Poly(xanthates) (S—S Bidentates and S—S
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #42:
Typically RR′R′′P═C(SH)(SH) [pentavalent P],


Phosphinodithioformates (S—S Bidentates)
although RR′P—C(═S)(SH) [trivalent P] may be



acceptable in some situations, where R, R′, and



R′′ represent H, NH2 or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #43:
R—S—C(—S—R′′)—O—R′ for dithioborates, R—S—C(—S—R′′)—S—R′


Alkyl- and Aryl-Dithioborates,
for trithioborates, and R—S—S—C(—S—R′′)—S—R′


Trithioborates, Perthioborates,
for perthioborates, where R, R′, and


Bis(dithioborates), Bis(trithioborates), and
R′′ represent H, NH2 or any organic functional


Bis(perthioborates) (S—S Bidentates and S—S
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #44:
R—C(—S—R′′)—S—R′, where R, R′, and R′′


Alkyl- and Aryl-Dithioboronates, and
represent H, NH2 or any organic functional


Bis(dithioboronates) (S—S Bidentates and S—S
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #45:
(O═)As(—S—R)(—S—R′)(—S—R′′) or (S═)As(—S—R)(—S—R′)(—O—R′′)


Trithioarsonic Acids (Arsonotrithioic
for trithioarsonic acid; (O═)As(—O—R)(—S—R′)(—S—R′′)


Acids), Dithioarsonic Acids
or (S═)As(—S—R)(—O—R′)(—O—R′′)


(Arsonodithioic Acids), Tetrathioarsonic
for dithioarsonic acid, or (S═)As(—S—R)(—S—R′)(—S—R′′)


Acids (Arsonotetrathioic Acids), and
for tetrathioarsonic acid, where R,


derivatives thereof (S—S Bidentates, S—S
R′, and R′′ represent H, NH2 or any organic


Tridentates, S—S Tetradentates)
functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #46:
(O═)Sb(—S—R)(—S—R′)(—S—R′′) or (S═)Sb(—S—R)(—S—R′)(—O—R′′)


Trithioantimonic Acids (Stibonotrithioic
for trithioantimonic acid;


Acids), Dithioantimonic Acids
(O═)Sb(—O—R)(—S—R′)(—S—R′) or (S═)Sb(—S—R)(—O—R′)(—O—R′′)


(Stibonodithioic Acids), Tetrathioantimonic
for dithioantimonic acid, or


Acids (Stibonotetrathioic Acids), and
(S═)Sb(—S—R)(—S—R′)(—S—R′′) for


derivatives thereof (S—S Bidentates, S—S
tetrathioantimonic acid, where R, R′, and R′′


Tridentates, S—S Tetradentates)
represent H, NH2 or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S Valence Stabilizer #47:
RR′R′′P═S for phosphine P-sulfides, and


Phosphine P-sulfides and Amino-
(RR′N)(R′′R′′′N)(R′′′′R′′′′′N)P═S for amino-


substituted Phosphine sulfides (S
substituted phosphine sulfides, where R, R′, R′′,


Monodentates)
R′′′, R′′′′, and R′′′′′ represent H, Cl, Br, NH2 or



any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. (Rs are typically aromatic or



heterocyclic for phosphine P-sulfides.) Ligand



can also contain nonbinding N, O, S, or P



atoms.


S Valence Stabilizer #48:
RR′R′′As═S for arsine As-sulfides, and


Arsine As-sulfides and Amino-substituted
(RR′N)(R′′R′′′N)(R′′′′R′′′′′N)As═S for amino-


Arsine sulfides (S Monodentates)
substituted arsine sulfides, where R, R′, R′′,



R′′′, R′′′′, and R′′′′′ represent H, Cl, Br, NH2 or



any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. (Rs are typically aromatic or



heterocyclic for arsine As-sulfides.) Ligand can



also contain nonbinding N, O, S, or P atoms.


S Valence Stabilizer #49:
Thiols (HS—R, HS—R—SH, etc.), where R and R′


Thiolates (S Monodentates)
represent H or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


S Valence Stabilizer #50:
Sulfide (—S2−) ligands bound directly to the high


Sulfide ligands (S Monodentates)
valence metal ion.


P Valence Stabilizer #1:
PH3, PH2R, PHR2, and PR3 where R represents


Monophosphines (P Monodentates)
H or any organic functional group wherein the


wherein at least one Phosphorus Atom is a
number of carbon atoms ranges from 0 to 35,


Binding Site
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, As, O, S, or Se atoms.


P Valence Stabilizer #2:
R′—P—R—P—R′′, where R, R′, and R′′ represent H


Diphosphines (a P—P Bidentate) wherein at
or any organic functional group wherein the


least one Phosphorus Atom is a Binding
number of carbon atoms ranges from 0 to 35,


Site
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, As, O, S, or Se atoms.


P Valence Stabilizer #3:
R—P—R′—P—R′′—P—R′′′, where R, R′, R′′, and R′′′


Triphosphines (either P—P Bidentates or P—P—P
represent H or any organic functional group


Tridentates) wherein at least one
wherein the number of carbon atoms ranges


Phosphorus Atom is a Binding Site
from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, P, As, O, S, or Se atoms.


P Valence Stabilizer #4:
R—P—R′—P—R′′—P—R′′′—P—R′′′′, where R, R′, R′′,


Tetraphosphines (P—P Bidentates, P—P
R′′′, and R′′′′ represent H or any organic


Tridentates, or P—P Tetradentates) wherein
functional group wherein the number of carbon


at least one Phosphorus Atom is a Binding
atoms ranges from 0 to 35, optionally having


Site
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, As, O,



S, or Se atoms.


P Valence Stabilizer #5:
R—P—R′—P—R′′—P—R′′′—P—R′′′′—P—R′′′′′, where R, R′,


Pentaphosphines (P—P Bidentates, P—P
R′′, R′′′, R′′′′, and R′′′′′ represent H or any


Tridentates, or P—P Tetradentates) wherein
organic functional group wherein the number of


at least one Phosphorus Atom is a Binding
carbon atoms ranges from 0 to 35, optionally


Site
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, As, O,



S, or Se atoms.


P Valence Stabilizer #6:
R—P—R′—P—R′′—P—R′′′—P—R′′′′—P—R′′′′′—P—R′′′′′′,


Hexaphosphines (P—P Bidentates, P—P
where R, R′, R′′, R′′′, R′′′′, R′′′′′, and R′′′′′′


Tridentates, P—P Tetradentates, or P—P
represent H or any organic functional group


Hexadentates) wherein at least one
wherein the number of carbon atoms ranges


Phosphorus Atom is a Binding Site
from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, P, As, O, S, or Se atoms.


P Valence Stabilizer #7:
Five membered heterocyclic ring containing


Five-Membered Heterocyclic Rings
one, two, or three phosphorus atoms, all of


containing One, Two, or Three Phosphorus
which may or may not function as binding sites.


Atoms wherein at least one Phosphorus
Can include other ring systems bound to this


Atom is a Binding Site (P Monodentates or
heterocyclic ring, but they do not coordinate


P—P Bidentates)
with the stabilized, high valence metal ion.



Ring can also contain O, S, N, As, or Se atoms.



This 5-membered ring and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #8:
Six membered heterocyclic ring containing one,


Six-Membered Heterocyclic Rings
two, or three phosphorus atoms, all of which


containing One, Two, or Three Phosphorus
may or may not function as binding sites. Can


Atoms wherein at least one Phosphorus
include other ring systems bound to this


Atom is a Binding Site (P Monodentates or
heterocyclic ring, but they do not coordinate


P—P Bidentates)
with the stabilized, high valence metal ion.



Ring can also contain O, S, N, As, or Se atoms.



This 6-membered ring and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #9:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, or three phosphorus atoms. In


containing One, Two, or Three Phosphorus
addition, ligand contains additional phosphorus-


Atoms at least one additional Phosphorus
containing substituents (usually phosphines)


Atom Binding Site not in a Ring (P
that constitute P binding sites. Can include


Monodentates, P—P Bidentates, P—P
other ring systems bound to the heterocyclic


Tridentates, P—P Tetradentates, or P—P
ring or to the P-containing substituent, but they


Hexadentates)
do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



N, S, As or Se atoms. This 5-membered ring(s)



and/or attached, uncoordinating rings and/or P-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #10:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, or three phosphorus atoms. In


containing One, Two, or Three Phosphorus
addition, ligand contains additional phosphorus-


Atoms at least one additional Phosphorus
containing substituents (usually phosphines)


Atom Binding Site not in a Ring (P
that constitute P binding sites. Can include


Monodentates, P—P Bidentates, P—P
other ring systems bound to the heterocyclic


Tridentates, P—P Tetradentates, or P—P
ring or to the P-containing substituent, but they


Hexadentates)
do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



N, S, As or Se atoms. This 6-membered ring(s)



and/or attached, uncoordinating rings and/or P-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #11:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one, two, or three phosphorus atoms. In


containing One, Two, or Three Phosphorus
addition, ligand contains additional phosphorus-


Atoms at least one additional Phosphorus
containing rings that constitute P binding sites.


Atom Binding Site in a separate Ring (P
Can include other ring systems bound to the P-


Monodentates, P—P Bidentates, P—P
containing heterocyclic rings, but they do not


Tridentates, P—P Tetradentates, or P—P
coordinate with the stabilized, high valence


Hexadentates)
metal ion. Ring(s) can also contain O, N, S, As,



or Se atoms. This 5-membered ring(s) and/or



additional P-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #12:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one, two, or three phosphorus atoms. In


containing One, Two, or Three Phosphorus
addition, ligand contains additional phosphorus-


Atoms at least one additional Phosphorus
containing rings that constitute P binding sites.


Atom Binding Site in a separate Ring (P
Can include other ring systems bound to the P-


Monodentates, P—P Bidentates, P—P
containing heterocyclic rings, but they do not


Tridentates, P—P Tetradentates, or P—P
coordinate with the stabilized, high valence


Hexadentates)
metal ion. Ring(s) can also contain O, N, S, As,



or Se atoms. This 6-membered ring(s) and/or



additional P-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P Valence Stabilizer #13:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Five-, Six-, and Eight-
five, six, or eight phosphorus binding sites to


Membered Macrocyclics, Macrobicyclics,
valence stabilize the central metal ion. Can


and Macropolycyclics (including
include other hydrocarbon or ring systems


Catapinands, Cryptands, Cyclidenes, and
bound to this macrocyclic ligand, but they do


Sepulchrates) wherein all Binding Sites are
not coordinate with the stabilized, high valence


composed of Phosphorus and are not
metal ion. This ligand and/or attached,


contained in Component Heterocyclic
uncoordinating hydrocarbons/rings may or may


Rings (P—P Bidentates, P—P Tridentates, P—P
not have halogen or polarizing or water-


Tetradentates, and P—P Hexadentates)
insolubilizing/solubilizing groups attached.


P Valence Stabilizer #14:
Macrocyclic ligands containing a total of four,


Four-, Six-, or Eight-Membered
six, or eight five-membered heterocyclic rings


Macrocyclics, Macrobicyclics, and
containing phosphorus binding sites. Can


Macropolycyclics (including Catapinands,
include other hydrocarbon/ring systems bound


Cryptands, Cyclidenes, and Sepulchrates)
to this macrocyclic ligand, but they do not


wherein all Binding Sites are composed of
coordinate with the stabilized, high valence


Phosphorus and are contained in
metal ion. This ligand and/or attached,


Component 5-Membered Heterocyclic
uncoordinating hydrocarbon/rings may or may


Rings (P—P Tridentates, P—P Tetradentates,
not have halogen or polarizing or water-


or P—P Hexadentates)
insolubilizing groups attached.


P Valence Stabilizer #15:
Macrocyclic ligands containing at least one 5-


Four-, Six-, or Eight-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide phosphorus binding


Macropolycyclics (including Catapinands,
sites to valence stabilize the central metal ion.


Cryptands, Cyclidenes, and Sepulchrates)
Other phosphine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Phosphorus and are contained in a
the total number of binding sites is four, six, or


Combination of 5-Membered Heterocyclic
eight. Can include other hydrocarbon/ring


Rings and Phosphine Groups (P—P
systems bound to this macrocyclic ligand, but


Tridentates, P—P Tetradentates, or P—P
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


P Valence Stabilizer #16:
Macrocyclic ligands containing a total of four,


Four-, Six-, or Eight-Membered
six, or eight six-membered heterocyclic rings


Macrocyclics, Macrobicyclics, and
containing phosphorus binding sites. Can


Macropolycyclics (including Catapinands,
include other hydrocarbon/ring systems bound


Cryptands, Cyclidenes, and Sepulchrates)
to this macrocyclic ligand, but they do not


wherein all Binding Sites are composed of
coordinate with the stabilized, high valence


Phosphorus and are contained in
metal ion. This ligand and/or attached,


Component 6-Membered Heterocyclic
uncoordinating hydrocarbon/rings may or may


Rings (P—P Tridentates, P—P Tetradentates,
not have halogen or polarizing or water-


or P—P Hexadentates)
insolubilizing groups attached.


P Valence Stabilizer #17:
Macrocyclic ligands containing at least one 6-


Four-, Six-, or Eight-Membered
membered heterocyclic ring. These


Macrocyclics, Macrobicyclics, and
heterocyclic rings provide phosphorus binding


Macropolycyclics (including Catapinands,
sites to valence stabilize the central metal ion.


Cryptands, Cyclidenes, and Sepulchrates)
Other phosphine binding sites can also be


wherein all Binding Sites are composed of
included in the macrocyclic ligand, so long as


Phosphorus and are contained in a
the total number of binding sites is four, six, or


Combination of 6-Membered Heterocyclic
eight. Can include other hydrocarbon/ring


Rings and Phosphine Groups (P—P
systems bound to this macrocyclic ligand, but


Tridentates, P—P Tetradentates, or P—P
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


O Valence Stabilizer #1:
R—O—C(═O)—S—S—C(═O)—O—R′, where R and R′


Dithioperoxydicarbonic Acids,
represent H, NH2 or any organic functional


Bis(dithioperoxydicarbonic acids),
group wherein the number of carbon atoms


poly(dithioperoxydicarbonic acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (O—O Bidentates, O—O
or polarizing or water-


Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #2:
(R—O—)(R′—)P(═O)—NH—P(═O)(—R′′)(—O—R′′′) for


Imidodiphosphonic Acids,
imidodiphosphonic acids, and (R—O—)(R′—)P(═O)—NH—NH—P(═O) (—R′′)(—O—R′′′)


Hydrazidodiphosphonic Acids,
for


Bis(imidodiphosphonic Acids),
hydrazidodiphosphonic acids; where R, R′, R′′,


Bis(hydrazidodiphosphonic Acids),
and R′′′ represent H, NH2 or any organic


Poly(imidodiphosphonic Acids),
functional group wherein the number of carbon


Poly(hydrazidodiphosphonic Acids), and
atoms ranges from 0 to 40, optionally having


derivatives thereof (O—O Bidentates, O—O
halogen or polarizing or water-


Tridentates, O—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #3:
(RR′—N—)(R′′—)P(═O)—NH—P(═O)(—R′′′)(—N—R′′′′R′′′′′)


Imidodiphosphonamides,
for imidodiphosphonamides, and —NH—NH-


Hydrazidodiphosphonamides,
derivatives for


Bis(imidodiphosphonamides),
hydrazidodiphosphonamides, where R, R′, R′′,


Bis(hydrazidodiphosphonamides),
R′′′, R′′′′, and R′′′′′ represent H, NH2 or any


Poly(imidodiphosphonamides), and
organic functional group wherein the number of


Poly(hydrazidodiphosphonamides) (O—O
carbon atoms ranges from 0 to 40, optionally


Bidentates, O—O Tridentates, O—O
having halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #4:
(RR′—N—)(R′′—)P(═O)—O—P(═O)(—R′′′)(—N—R′′′′R′′′′′),


Diphosphonamides,
where R, R′, R′′, R′′′, R′′′′, and R′′′′′


Bis(diphosphonamides), and
represent H, NH2 or any organic functional


Poly(diphosphonamides) (O—O Bidentates,
group wherein the number of carbon atoms


O—O Tridentates, O—O Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #5:
R—O—C(═O)—O—R′, where R, and R′ represent H,


Carbonates and Bis(carbonates) (O—O
NH2 or any organic functional group wherein


Bidentates and O—O Tetradentates)
the number of carbon atoms ranges from 0 to



40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


O Valence Stabilizer #6:
RR′N—NR′′—C(═O)(OH), where R and R′


Carbazates (carbazides), Bis(carbazates),
represent H, NH2 or any organic functional


and Poly(carbazates) (O—O Bidentates, O—O
group wherein the number of carbon atoms


Tridentates, and O—O Tetradentates; or
ranges from 0 to 40, optionally having halogen


possibly N—O Bidentates, N—O Tridentates,
or polarizing or water-


and N—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #7:
(O═)As(—O—R)(—O—R′)(—O—R′′), where R, R′, and


Arsonic Acids, Bis(arsonic acids),
R′′ represent H, NH2 or any organic functional


Poly(arsonic acids), and derivatives thereof
group wherein the number of carbon atoms


(O—O Bidentates, O—O Tridentates, O—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #8:
R—O—C(—O—R′′)—O—R′, where R, R′, and R′′


Alkyl- and Aryl- Borates and Bis(borates)
represent H, NH2 or any organic functional


(O—O Bidentates and O—O Tetradentates)
group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #9:
R—C(—O—R′′)—O—R′, where R, R′, and R′′


Alkyl- and Aryl- Boronates and
represent H, NH2 or any organic functional


Bis(boronates) (O—O Bidentates and O—O
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


O Valence Stabilizer #10:
RR′R′′P═O for phosphine P-oxides, and


Phosphine P-oxides and Amino-substituted
(RR′N)(R′′R′′′N)(R′′′′R′′′′′N)P═O for amino-


Phosphine oxides (O Monodentates)
substituted phosphine oxides, where R, R′, R′′,



R′′′, R′′′′, and R′′′′′ represent H, Cl, Br, NH2 or



any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. (Rs are typically aromatic or



heterocyclic for phosphine P-oxides.) Ligand



can also contain nonbinding N, O, S, or P



atoms.


O Valence Stabilizer #11:
RR′R′′As═O for arsine As-oxides, and


Arsine As-oxides and Amino-substituted
(RR′N)(R′′R′′′N)(R′′′′R′′′′′N)As═O for amino-


Arsine oxides (O Monodentates)
substituted arsine oxides, where R, R′, R′′, R′′′,



R′′′′, and R′′′′′ represent H, Cl, Br, NH2 or any



organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached. (Rs



are typically aromatic or heterocyclic for arsine



As-oxides.) Ligand can also contain nonbinding



N, O, S, or P atoms.


O Valence Stabilizer #12:
Five membered heterocyclic ring containing one


Five-Membered Heterocyclic Rings
or two oxygen atoms, both of which may or


containing One or Two Oxygen Atoms
may not function as binding sites. Can include


wherein at least one Oxygen Atom is a
other ring systems bound to this heterocyclic


Binding Site (O Monodentates or O—O
ring, but they do not coordinate with the


Bidentates)
stabilized, high valence metal ion. Ring can



also contain O, S, or P atoms. This 5-membered



ring and/or attached, uncoordinating rings may



or may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #13:
Six membered heterocyclic ring containing one


Six-Membered Heterocyclic Rings
or two oxygen atoms, both of which may or


containing One or Two Oxygen Atoms
may not function as binding sites. Can include


wherein at least one Oxygen Atom is a
other ring systems bound to this heterocyclic


Binding Site (O Monodentates or O—O
ring, but they do not coordinate with the


Bidentates)
stabilized, high valence metal ion. Ring can



also contain O, S, or P atoms. This 6-membered



ring and/or attached, uncoordinating rings may



or may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #14:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms and
contains additional oxygen-containing


having at least one additional Oxygen Atom
substituents (usually hydroxyl or ester groups)


Binding Site not in a Ring (O
that constitute O binding sites. Can include


Monodentates, O—O Bidentates, O
other ring systems bound to the heterocyclic


Tridentates, O Tetradentates, or O
ring or to the O-containing substituent, but they


Hexadentates)
do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



S, or P atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #15:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms and
contains additional oxygen-containing


having at least one additional Oxygen Atom
substituents (usually hydroxyl or ester groups)


Binding Site not in a Ring (O
that constitute O binding sites. Can include


Monodentates, O—O Bidentates, O
other ring systems bound to the heterocyclic


Tridentates, O Tetradentates, or O
ring or to the O-containing substituent, but they


Hexadentates)
do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



S, or P atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #16:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms and
contains additional oxygen-containing rings that


having at least one additional Oxygen Atom
constitute O binding sites. Can include other


Binding Site in a Separate Ring (O
ring systems bound to the O-containing


Monodentates, O—O Bidentates, O
heterocyclic rings, but they do not coordinate


Tridentates, O Tetradentates, or O
with the stabilized, high valence metal ion.


Hexadentates)
Ring(s) can also contain O, S, or P atoms. This



5-membered ring(s) and/or additional O-



containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #17:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one or two oxygen atoms. In addition, ligand


containing One or Two Oxygen Atoms and
contains additional oxygen-containing rings that


having at least one additional Oxygen Atom
constitute O binding sites. Can include other


Binding Site in a Separate Ring (O
ring systems bound to the O-containing


Monodentates, O—O Bidentates, O
heterocyclic rings, but they do not coordinate


Tridentates, O Tetradentates, or O
with the stabilized, high valence metal ion.


Hexadentates)
Ring(s) can also contain O, S, or P atoms. This



6-membered ring(s) and/or additional O-



containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


O Valence Stabilizer #18:
Macrocyclic ligands containing four, five, six,


Four-, Five-, Six-, Seven-, Eight-, and Ten-
seven, eight, or ten oxygen binding sites to


Membered Macrocyclics, Macrobicyclics,
valence stabilize the central metal ion. Can


and Macropolycyclics (including
include other hydrocarbon or ring systems


Catapinands, Cryptands, Cyclidenes, and
bound to this macrocyclic ligand, but they do


Sepulchrates) wherein all Binding Sites are
not coordinate with the stabilized, high valence


composed of Oxygen (usually ester or
metal ion. This ligand and/or attached,


hydroxyl groups) and are not contained in
uncoordinating hydrocarbons/rings may or may


Component Heterocyclic Rings (O—O
not have halogen or polarizing or water-


Bidentates, O—O Tridentates, O—O
insolubilizing/solubilizing groups attached.


Tetradentates, and O—O Hexadentates)


O Valence Stabilizer #19:
Macrocyclic ligands containing a total of four,


Four-, Five-, Six-, Seven-, Eight-, and Ten-
five, six, seven, eight, or ten five-membered


Membered Macrocyclics, Macrobicyclics,
heterocyclic rings containing oxygen binding


and Macropolycyclics (including
sites. Can include other hydrocarbon or ring


Catapinands, Cryptands, Cyclidenes, and
systems bound to this macrocyclic ligand, but


Sepulchrates) wherein all Binding Sites are
they do not coordinate with the stabilized, high


composed of Oxygen and are contained in
valence metal ion. This ligand and/or attached,


Component 5-Membered Heterocyclic
uncoordinating hydrocarbons/rings may or may


Rings (O—O Bidentates, O—O Tridentates,
not have halogen or polarizing or water-


O—O Tetradentates, and O—O Hexadentates)
insolubilizing/solubilizing groups attached.


O Valence Stabilizer #20:
Macrocyclic ligands containing a total of four,


Four-, Five-, Six-, Seven-, Eight-, and Ten-
five, six, seven, eight, or ten six-membered


Membered Macrocyclics, Macrobicyclics,
heterocyclic rings containing oxygen binding


and Macropolycyclics (including
sites. Can include other hydrocarbon or ring


Catapinands, Cryptands, Cyclidenes, and
systems bound to this macrocyclic ligand, but


Sepulchrates) wherein all Binding Sites are
they do not coordinate with the stabilized, high


composed of Oxygen and are contained in
valence metal ion. This ligand and/or attached,


Component 6-Membered Heterocyclic
uncoordinating hydrocarbons/rings may or may


Rings (O—O Bidentates, O—O Tridentates,
not have halogen or polarizing or water-


O—O Tetradentates, and O—O Hexadentates)
insolubilizing/solubilizing groups attached.


N—S Valence Stabilizer #1:
RC(═NH)SR', where R and R' represent H or


Thioimidates, Dithioimidates,
any organic functional group wherein the


Polythioimidates, and Derivatives of
number of carbon atoms ranges from 0 to 40,


Thioimidic Acid (N—S Bidentates and N—S
optionally having halogen or polarizing or


Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #2:
RR′—N—C(═NH)—NR′′—CS—NR′′′R′′′′ for


Thioguanylureas, Guanidinothioureas,
thioguanylureas, and RR′—N—C(═NH)—NR′′—NH—CS—NR′′′R′′′′


Bis(thioguanylureas),
for guanidinothioureas, where R,


Bis(guanidinothioureas),
R′, R′′, R′′′, and R′′′′ represent H, NH2, or any


Poly(thioguanylureas), and
organic functional group wherein the number of


Poly(guanidinothioureas) (N—S Bidentates
carbon atoms ranges from 0 to 40, optionally


and N—S Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #3:
RR′—N—C(═NH)—NR′′—CS—R′′′ for N-


Amidinothioamides, Guanidinothioamides,
amidinothioamides, or RR′—N—C(═NH)—CR′′R′′′—CS—N—R′′′′R′′′′′


Bis(amidinothioamides),
for 2-


Bis(guanidinothioamides),
amidinothioacetamides, and RR′—N—C(═NH)—NR′′—NH—CS—R′′′


Poly(amidinothioamides), and
for guanidinothioamides,


Poly(guanidinothioamides) (including both
where R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent


N-amidinothioamides and 2-
H, NH2, or any organic functional group


amidinothioacetamides) (N—S Bidentates
wherein the number of carbon atoms ranges


and N—S Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #4:
R—C(═NH)—NR′—CS—R′′, where R, R′, and R′′,


Imidoylthioamides,
represent H or any organic functional group


Bis(imidoylthioamides), and
wherein the number of carbon atoms ranges


Poly(imidoylthioamides) (N—S Bidentates
from 0 to 40, optionally having halogen or


and N—S Tetradentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #5:
RR′NCSNR′′R′′′, where R, R′, R′′, and R′′′


Thioureas, Bis(thioureas), and
represent H, NH2, or any organic functional


Poly(thioureas), including Thiourylene
group wherein the number of carbon atoms


Complexes (N—S Bidentates, N—S
ranges from 0 to 40, optionally having halogen


Tridentates, and N—S Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #6:
RCSNR′R′′, where R, R′, and R′′ represent H,


Thiocarboxamides, Bis(thiocarboxamides),
NH2, or any organic functional group wherein


and Poly(thiocarboxamides) (N—S
the number of carbon atoms ranges from 0 to


Bidentates, N—S Tridentates, and N—S
40, optionally having halogen or polarizing or


Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #7:
RR′—N—S(═NH)—N—R′′R′′′, where R, R′, R′′, and


Imidosulfurous Diamides and
R′′′ represent H or any organic functional group


Bis(imidosulfurous diamides) (N—S
wherein the number of carbon atoms ranges


Bidentates, N—S Tridentates, and N—S
from 0 to 40, optionally having halogen or


Tetradentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #8:
R—N═S═N—R′, where R and R′ represent H or


Sulfurdiimines, Bis(sulfurdiimines), and
any organic functional group wherein the


Poly(sulfurdiimines) (N—S Bidentates, N—S
number of carbon atoms ranges from 0 to 40,


Tridentates, and N—S Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #9:
(NH═)PR(OR′)(SR′′) for phosphonimidothioic


Phosphonimidothioic Acid,
acid and (NH═)PR(SR′)(SR′′) for


Phosphonimidodithioic Acid,
phosphonimidodithioic acid, where R, R′, and


Bis(Phosphonimidothioic acid);
R′′ represent H or any organic functional group


Bis(Phosphonimidodithioic acid), and
wherein the number of carbon atoms ranges


derivatives thereof (N—S Bidentates, N—S
from 0 to 40, optionally having halogen or


Tetradentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #10:
(S═)PR(—NR′R′′)(—NR′′′R′′′′), where R, R′, R′′,


Phosphonothioic Diamides,
R′′′, and R′′′′ represent H or any organic


Bis(phosphonothioic diamides), and
functional group wherein the number of carbon


Poly(phosphonothioic diamides) (N—S
atoms ranges from 0 to 40, optionally having


Bidentates and N—S Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #11:
(S═)PR(—NR′R′′)(—OR′′′) or (O═)PR(—NR′R′′)(—SR′′′)


Phosphonamidothioic Acid,
for phosphonamidothioic acid, (S═)PR(—NR′R′′)(—SR′′′)


Phosphonamidimidodithioic Acid,
for phosphonamidimidodithioic


Bis(phosphonamidothioic acid),
acid, where R, R′, R′′, and R′′′ represent H or


Bis(phosphonamidimidodithioic acid),
any organic functional group wherein the


poly(phosphonamidothioic acid), and
number of carbon atoms ranges from 0 to 40,


poly(phosphonamidimidodithioic acid), and
optionally having halogen or polarizing or


derivatives thereof (N—S Bidentates and N—S
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #12:
R—C(═S)—CR′═CR′′—NHR′′′, where R, R′, R′′,


Beta-Aminothiones (N-Substituted 3-
and R′′′ represent H, or any organic functional


amino-2-propenethioaldehydes), Bis(beta-
group wherein the number of carbon atoms


aminothiones), and Poly(beta-
ranges from 0 to 40, optionally having halogen


aminothiones) (N—S Bidentates and N—S
or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #13:
RR′—N—C(═S)—CR′′═C(—NHR′′′)R′′′′ for 3-


3-Aminothioacrylamides (3-Amino-2-
aminothioacrylamides, and RR′—N—C(═S)—CR′′═C(—NHR′′′)(—NR′′′′R′′′′′)


thiopropenamides), 3,3-
for 3,3-


Diaminothioacrylamides, Bis(3-
diaminothioacrylamides, where R, R′, R′′, R′′′,


aminothioacrylamides), Bis(3,3-
R′′′′, R′′′′′ represent H, NH2, or any organic


diaminoacrylamides), Poly(3-
functional group wherein the number of carbon


aminothioacrylamides), and Poly(3,3-
atoms ranges from 0 to 40, optionally having


diaminothioacrylamides) (N—S Bidentates
halogen or polarizing or water-


and N—S Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #14:
R—O—C(═S)—CR′═C(—NHR′′)R′′′ or R—S—C(═S)—CR′═C(—NHR′′)R′′′


3-Aminothioacrylic Acids (3-Amino-2-
for 3-aminothioacrylic


thiopropenoic acids), 3-Mercapto-3-
acids, and R—O—C(═S)—CR′═C(—NHR′′)(—S—R′′′)


aminothioacrylic acids, Bis(3-
or R—S—C(═S)—CR′═C(—NHR′′)(—S—R′′′) for 3-


aminothioacrylic acids), Bis(3-Hydroxy-3-
mercapto-3-aminothioacrylic acids, where R,


aminothioacrylic acids), Poly(3-
R′, R′′, and R′′′ represent H, NH2, or any


aminothioacrylic acids), and Poly(3-
organic functional group wherein the number of


Hydroxy-3-aminothioacrylic acids), and
carbon atoms ranges from 0 to 40, optionally


derivatives thereof (N—S Bidentates and N—S
having halogen or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #15:
R—C(═S)—N═CHR′, where R′ represents an


N-Thioacyl Benzylidenimines, Bis(N-
aromatic derivative (i.e. —C6H5), and R represent


thioacyl benzylidenimines), and Poly(N-
H, NH2, or any organic functional group


thioacyl benzylidenimines) (N—S Bidentates
wherein the number of carbon atoms ranges


and N—S Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #16:
R—C(═S)—C(═NOH)—R′, where R and R′


Thiocarbonyl oximes, Bis(thiocarbonyl
represent H, NH2, or any organic functional


oximes), and Poly(thiocarbonyl oximes)
group wherein the number of carbon atoms


(N—S Bidentates, N—S Tridentates, and N—S
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #17:
R—CH(—SH)—C(═NOH)—R′, where R, R′, and R′′


Mercapto oximes, Bis(mercapto oximes),
represent H, NH2, or any organic functional


and Poly(mercapto oximes) (including 2-
group wherein the number of carbon atoms


sulfur heterocyclic oximes) (N—S
ranges from 0 to 40, optionally having halogen


Bidentates, N—S Tridentates, N—S
or polarizing or water-


Tetradentates, and N—S Hexadentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—S Valence Stabilizer #18:
o-(O2N—)(HS—)Ar, where Ar represents an


2-Nitrothiophenols (2-nitrobenzenethiols)
aromatic group or heterocyclic wherein the


(N—S Bidentates)
number of carbon atoms ranges from 6 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #19:
o-(NC—(CH2)0–1)(HS—)Ar, where Ar represents


2-Nitrilothiophenols (N—S Bidentates)
an aromatic group or heterocyclic wherein the



number of carbon atoms ranges from 6 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—S Valence Stabilizer #20:
R—C(═S)—NHNR′R′′, where R, R′, and R′′


Thiohydrazides, Bis(thiohydrazides), and
represent H or any organic functional group


Poly(thiohydrazides) (N—S Bidentates and
wherein the number of carbon atoms ranges


N—S Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #21:
RR′—N—C(═S)—NHNR′′R′′′, where R, R′, and R′′


Thiosemicarbazides,
represent H or any organic functional group


Bis(thiosemicarbazides), and
wherein the number of carbon atoms ranges


Poly(thiosemicarbazides) (N—S Bidentates,
from 0 to 40, optionally having halogen or


N—S Tetradentates, and N—S Hexadentates)
polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—S Valence Stabilizer #22:
Macrocyclic ligands containing five, seven, or


Five-, Seven-, or Nine-Membered
nine binding sites composed of nitrogen and


Macrocyclics, Macrobicyclics, and
sulfur to valence stabilize the central metal ion.


Macropolycyclics (including Catapinands,
Can include other hydrocarbon or ring systems


Cryptands, Cyclidenes, and Sepulchrates)
bound to this macrocyclic ligand, but they do


wherein all Binding Sites are composed of
not coordinate with the stabilized, high valence


Nitrogen (usually amine or imine groups) or
metal ion. This ligand and/or attached,


Sulfur (usually thiols, mercaptans, or
uncoordinating hydrocarbons/rings may or may


thiocarbonyls) and are not contained in
not have halogen or polarizing or water-


Component Heterocyclic Rings (N—S
insolubilizing/solubilizing groups attached.


Tridentates, N—S Tetradentates, and N—S


Hexadentates)


N—S Valence Stabilizer #23:
Macrocyclic ligands containing a total of five or


Five-, or Seven-Membered Macrocyclics,
seven heterocyclic rings containing nitrogen or


Macrobicyclics, and Macropolycyclics
sulfur binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Nitrogen or
with the stabilized, high valence metal ion. This


Sulfur and are contained in Component
ligand and/or attached, uncoordinating


Heterocyclic Rings (N—S Tridentates, N—S
hydrocarbon/rings may or may not have halogen


Tetradentates, or N—S Hexadentates)
or polarizing or water-insolubilizing groups



attached.


N—S Valence Stabilizer #24:
Macrocyclic ligands containing at least one


Five-, Seven-, or Nine-Membered
heterocyclic ring. These heterocyclic rings


Macrocyclics, Macrobicyclics, and
provide nitrogen or sulfur binding sites to


Macropolycyclics (including Catapinands,
valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine, imine, thiol, mercapto, or thiocarbonyl


wherein all Binding Sites are composed of
binding sites can also be included in the


Nitrogen or Sulfur and are contained in a
macrocyclic ligand, so long as the total number


Combination of Heterocyclic Rings and
of binding sites is five, seven, or nine. Can


Amine, Imine, Thiol, Mercapto, or
include other hydrocarbon/ring systems bound


Thiocarbonyl Groups (N—S Tridentates, N—S
to this macrocyclic ligand, but they do not


Tetradentates, or N—S Hexadentates)
coordinate with the stabilized, high valence



metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


N—O Valence Stabilizer #1:
RC(═NH)OR′, where R and R′ represent H or


Imidates, Diimidates, Polyimidates, and
any organic functional group wherein the


Derivatives of Imidic Acid (N—O Bidentates
number of carbon atoms ranges from 0 to 40,


and N—O Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #2:
RR′NC(═NH)OR′′, where R, R′, and R′′


Pseudoureas, bis(pseudoureas), and
represent H, NH2, or any organic functional


poly(pseudoureas) (N—O Bidentates and N—O
group wherein the number of carbon atoms


Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #3:
RR′NC(═NH)CR′′R′′′(CO)OR′′′′, where R, R′,


2-Amidinoacetates, Bis(2-amidinoacetates),
R′′, R′′′, and R′′′′ represent H, NH2, or any


and Poly(2-amidinoacetates) (N—O
organic functional group wherein the number of


Bidentates and N—O Tetradentates)
carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #4:
RR′NCONR′′R′′′, where R, R′, R′′, and R′′′


Ureas, Bis(ureas), and Poly(ureas),
represent H, NH2, or any organic functional


including Urylene Complexes (N—O
group wherein the number of carbon atoms


Bidentates, N—O Tridentates, and N—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #5:
(NH═)PR(OR′)(OR′′), where R, R′, and R′′


Phosphonimidic Acid, Bis(phosphonimidic
represent H, NH2, or any organic functional


acid), Poly(phosphonimidic acid), and
group wherein the number of carbon atoms


derivatives thereof (N—O Bidentates and N—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #6:
(O═)PR(—NR′R′′)(—OR′′′) for phosphonamidic


Phosphonamidic Acid, Phosphonic
acid and (O═)PR(—NR′R′′) (—NR′′′R′′′′) for


Diamide, Bis(Phosphonamidic Acid),
phosphonic diamide, where R, R′, R′′, R′′′, and


Bis(Phosphonic Diamide),
R′′′′ represent H, NH2, or any organic functional


Poly(phosphonamidic acid),
group wherein the number of carbon atoms


poly(phosphonic diamide), and derivatives
ranges from 0 to 40, optionally having halogen


thereof (N—O Bidentates and N—O
or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #7:
R—C(═O)—CR′═C(—NHR′′)R′′′, where R, R′, R′′,


Beta-Ketoamines (N-Substituted 3-amino-
and R′′′ represent H, or any organic functional


2-propenals), Bis(beta-ketoamines), and
group wherein the number of carbon atoms


Poly(beta-ketoamines) (N—O Bidentates and
ranges from 0 to 40, optionally having halogen


N—O Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #8:
RR′—N—C(═O)—CR′′═C(—NHR′′′)R′′′′ for 3-


3-Aminoacrylamides (3-Amino-2-
aminoacrylamides, and RR′—N—C(═O)—CR′′═C(—NHR′′′)(—NR′′′′R′′′′′)


propenamides), 3,3-Diaminoacrylamides,
for 3,3-


Bis(3-aminoacrylamides), Bis(3,3-
diaminoacrylamides, where R, R′, R′′, R′′′, R′′′′,


diaminoacrylamides), Poly(3-
and R′′′′ represent H, NH2, or any organic


aminoacrylamides), and Poly(3,3-
functional group wherein the number of carbon


diaminoacrylamides) (N—O Bidentates and
atoms ranges from 0 to 40, optionally having


N—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #9:
R—O—C(═O)—CR′═C(—NHR′′)R′′′ for 3-


3-Aminoacrylic Acids (3-Amino-2-
aminoacrylic acids, and R—O—C(═O)—CR′═C(—NHR′′)(—O—R′′′)


propenoic acids), 3-Hydroxy-3-
for 3-hydroxy-3-aminoacrylic


aminoacrylic acids, Bis(3-aminoacrylic
acids, where R, R′, R′′, and R′′′ represent H,


acids), Bis(3-Hydroxy-3-aminoacrylic
NH2, or any organic functional group wherein


acids), Poly(3-aminoacrylic acids), and
the number of carbon atoms ranges from 0 to


Poly(3-Hydroxy-3-aminoacrylic acids), and
40, optionally having halogen or polarizing or


derivatives thereof (N—O Bidentates and N—O
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #10:
R—C(═O)—N═CHR′, where R′ represents an


N-Acyl Benzylidenimines, Bis(N-acyl
aromatic derivative (i.e. —C6H5), and R represent


benzylidenimines), and Poly(N-acyl
H, NH2, or any organic functional group


benzylidenimines) (N—O Bidentates and N—O
wherein the number of carbon atoms ranges


Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #11:
o-(O2N—)(RR′N—)Ar, where Ar represents an


2-Nitroanilines (N—O Bidentates)
aromatic group or heterocyclic wherein the



number of carbon atoms ranges from 6 to 40,



and R and R′ represent H, NH2, or alkyl or aryl



hydrocarbon groups wherein the number of



carbon atoms range from 0 to 25, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #12:
o-(NC—(CH2)0–1)(HO—)Ar, where Ar represents


2-Nitrilophenols (N—O Bidentates). Also
an aromatic group or heterocyclic wherein the


includes acylcyanamides.
number of carbon atoms ranges from 6 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


N—O Valence Stabilizer #13:
HetN+—O− for amine N-oxides, and R—N═N+(—O−)—R′


Amine N-Oxides and Diazine N-Oxides
for diazine N-oxides (azoxy compounds),


(Azoxy componds) (N—O Bidentates, N—O
where Het represents a nitrogen-containing


Tridentates, and N—O Tetradentates)
heterocyclic derivative wherein the number of



carbon atoms ranges from 4 to 40, and R and R′



represent separate or the same aromatic



functionalities, both Het and R, R′ optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


N—O Valence Stabilizer #14:
R—C(═O)—NHNR′R′′, where R, R′, and R′′


Hydrazides, Bis(hydrazides), and
represent H or any organic functional group


Poly(hydrazides) (N—O Bidentates and N—O
wherein the number of carbon atoms ranges


Tetradentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #15:
RR′—N—C(═O)—NHNR′′R′′′, where R, R′, and R′′


Semicarbazides, Bis(semicarbazides), and
represent H or any organic functional group


Poly(semicarbazides) (N—O Bidentates, N—O
wherein the number of carbon atoms ranges


Tetradentates, and N—O Hexadentates)
from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


N—O Valence Stabilizer #16:
Macrocyclic ligands containing five, seven, or


Five-, Seven-, or Nine-Membered
nine binding sites composed of nitrogen and


Macrocyclics, Macrobicyclics, and
oxygen to valence stabilize the central metal


Macropolycyclics (including Catapinands,
ion. Can include other hydrocarbon or ring


Cryptands, Cyclidenes, and Sepulchrates)
systems bound to this macrocyclic ligand, but


wherein all Binding Sites are composed of
they do not coordinate with the stabilized, high


Nitrogen (usually amine or imine groups) or
valence metal ion. This ligand and/or attached,


Oxygen (usually hydroxy, carboxy, or
uncoordinating hydrocarbons/rings may or may


carbonyl groups) and are not contained in
not have halogen or polarizing or water-


Component Heterocyclic Rings (N—O
insolubilizing/solubilizing groups attached.


Tridentates, N—O Tetradentates, and N—O


Hexadentates)


N—O Valence Stabilizer #17:
Macrocyclic ligands containing a total of five or


Five-, or Seven-Membered Macrocyclics,
seven heterocyclic rings containing nitrogen or


Macrobicyclics, and Macropolycyclics
oxygen binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Nitrogen or
with the stabilized, high valence metal ion. This


Oxygen and are contained in Component
ligand and/or attached, uncoordinating


Heterocyclic Rings (N—O Tridentates, N—O
hydrocarbon/rings may or may not have halogen


Tetradentates, or N—O Hexadentates)
or polarizing or water-insolubilizing groups



attached.


N—O Valence Stabilizer #18:
Macrocyclic ligands containing at least one


Five-, Seven-, or Nine-Membered
heterocyclic ring. These heterocyclic rings


Macrocyclics, Macrobicyclics, and
provide nitrogen or oxygen binding sites to


Macropolycyclics (including Catapinands,
valence stabilize the central metal ion. Other


Cryptands, Cyclidenes, and Sepulchrates)
amine, imine, hydroxy, carboxy, or carbonyl


wherein all Binding Sites are composed of
binding sites can also be included in the


Nitrogen or Oxygen and are contained in a
macrocyclic ligand, so long as the total number


Combination of Heterocyclic Rings and
of binding sites is five, seven, or nine. Can


Amine, Imine, Hydroxy, Carboxy, or
include other hydrocarbon/ring systems bound


Carbonyl Groups (N—O Tridentates, N—O
to this macrocyclic ligand, but they do not


Tetradentates, or N—O Hexadentates)
coordinate with the stabilized, high valence



metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


S—O Valence Stabilizer #1:
RR′—N—C(═S)—NR′′—C(═O)—NR′′′R′′′′ for


Thiobiurets (Thioimidodicarbonic
thiobiurets, and RR′—N—C(═S)—NR′′—NH—C(═O)—NR′′′R′′′′


Diamides), Thioisobiurets, Thiobiureas,
for thiobiureas, where R, R′, R′′, R′′′,


Thiotriurets, Thiotriureas, Bis(thiobiurets),
and R′′′′ represent H, NH2, or any organic


Bis(thioisobiurets), Bis(thiobiureas),
functional group wherein the number of carbon


Poly(thiobiurets), Poly(thioisobiurets),
atoms ranges from 0 to 40, optionally having


Poly(thiobiureas) (S—O Bidentates, S—O
halogen or polarizing or water-


Tridentates, S—O Tetradentates), and (3-
insolubilizing/solubilizing groups attached.


formamidino thiocarbamides)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #2:
RR′—N—C(═S)—NR′′—C(═O)—R′′′ for acyl- and


Acylthioureas, Aroylthioureas,
aroylthioureas, and RR′—N—C(═O)—NR′′—C(═S)—R′′′


Thioacylureas, Thioaroylureas,
for thioacyl- and thioaroylureas, where R,


Bis(acylthioureas), Bis(aroylthioureas),
R′, R′′, and R′′′ represent H, NH2, or any


Bis(thioacylureas), Bis(thioaroylureas),
organic functional group wherein the number of


Poly(thioacylthioureas),
carbon atoms ranges from 0 to 40, optionally


Poly(thioaroylthioureas),
having halogen or polarizing or water-


Poly(thioacylureas), and
insolubilizing/solubilizing groups attached.


Poly(thioaroylureas) (S—O Bidentates, S—O
Ligand can also contain nonbinding N, O, S, or


Tridentates, S—O Tetradentates)
P atoms.


S—O Valence Stabilizer #3:
RC(═S)—NR′—C(═O)—R′′ for


Thioimidodialdehydes,
thioimidodialdehydes, and RC(═S)—NR′—NH—C(═O)—R′′


Thiohydrazidodialdehydes (thioacyl
for thiohydrazidodialdehydes


hydrazides), Bis(thioimidodialdehydes),
(thioacyl hydrazides), where R, R′, and R′′


Bis(thiohydrazidodialdehydes),
represent H, NH2, or any organic functional


Poly(thioimidodialdehydes), and
group wherein the number of carbon atoms


Poly(thiohydrazidodialdehydes) (S—O
ranges from 0 to 40, optionally having halogen


Bidentates, S—O Tridentates, S—O
or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #4:
R—O—C(═S)—NR′—C(═O)—O—R′′ or R—S—C(═S)—NR′—C(═O)—S—R′′


Thioimidodicarbonic acids,
for thioimidodicarbonic acids,


Thiohydrazidodicarbonic acids,
and R—O—C(═S)—NR′—NH—C(═O)—O—R′′ or 


Bis(thioimidodicarbonic acids),
R—S—C(═S)—NR′—NH—C(═O)—S—R′′ for


Bis(thiohydrazidodicarbonic acids),
thiohydrazidodicarbonic acids, where R, R′, and


Poly(thioimidodicarbonic acids),
R′′ represent H, NH2, or any organic functional


Poly(thiohydrazidodicarbonic acids) and
group wherein the number of carbon atoms


derivatives thereof (S—O Bidentates, S—O
ranges from 0 to 40, optionally having halogen


Tridentates, S—O Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #5:
R—C(═S)—C(═O)—R′ where R and R′′ represent H,


1,2-Monothioketones (Monothiolenes,
NH2, or any organic functional group wherein


Monothio-alpha-ketonates), 1,2,3-
the number of carbon atoms ranges from 0 to


Monothioketones, 1,2,3-Dithioketones,
40, optionally having halogen or polarizing or


Monothiotropolonates, ortho-
water-insolubilizing/solubilizing groups


Monothioquinones, Bis(1,2-
attached. Ligand can also contain nonbinding N,


Monothioketones), and Poly(1,2-
O, S, or P atoms.


Monothioketones) (S—O Bidentates, S—O


Tridentates, S—O Tetradentates)


S—O Valence Stabilizer #6:
RR′—N—C(═S)—S—S—C(═O)—N—R′′R′′′ for


Trithioperoxydicarbonic Diamides,
trithioperoxydicarbonic diamides, and RR′—N—C(═O)—S—S—C(═O)—N—R′′R′′′


Dithioperoxydicarbonic Diamides,
for


Bis(trithioperoxydicarbonic diamides),
dithioperoxydicarbonic diamides, where R, R′,


Bis(dithioperoxydicarbonic diamides),
R′′, R′′′ represent H or any organic functional


poly(trithioperoxydicarbonic diamides) and
group wherein the number of carbon atoms


poly(dithioperoxydicarbonic diamides) (S—O
ranges from 0 to 40, optionally having halogen


Bidentates, S—O Tridentates, S—O
or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #7:
R—O—C(═S)—S—C(═O)—O—R′, where R and R′


Diithiodicarbonic Acids,
represent H, NH2 or any organic functional


Bis(dithiodicarbonic acids),
group wherein the number of carbon atoms


Poly(dithiodicarbonic acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (S—O Bidentates, S—O
or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #8:
R—O—C(═S)—S—S—C(═O)—O—R′, where R and R′


Trithioperoxydicarbonic Acids,
represent H, NH2 or any organic functional


Bis(trithioperoxydicarbonic acids),
group wherein the number of carbon atoms


poly(trithioperoxydicarbonic acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (S—O Bidentates, S—O
or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #9:
(RR′—N—)(R′′R′′′—N—)P(═S)—S—S—P(═O)(—N—R′′′′R′′′′′)(—N—R′′′′′′R′′′′′′′),


Monothioperoxydiphosphoramide,
where R, R′, R′′, R′′′,


Bis(monothioperoxyphosphoramide), and
R′′′′, R′′′′′, R′′′′′′, and R′′′′′′′ represent H, NH2 or


Poly(monothioperoxydiphosphoramide) (S—O
any organic functional group wherein the


Bidentates, S—O Tridentates, S—O
number of carbon atoms ranges from 0 to 40,


Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #10:
(R—O—)(R′—O—)P(═S)—S—S—P(═O)(—O—R′′)(—O—R′′′);


Monothioperoxydiphosphoric Acids,
(R—O—)(R′—S—)P(═S)—S—S—P(═O)(—S—R′′)(—O—R′′′);


Bis(monothioperoxyphosphoric Acids),
or (R—S—)(R′—S—)P(═S)—S—S—P(═O)(—S—R′′)(—S—R′′′),


Poly(monothioperoxydiphosphoric Acids),
where R, R′, R′′, R′′′, R′′′′, R′′′′′,


and derivatives thereof (S—O Bidentates, S—O
R′′′′′′, and R′′′′′′′ represent H, NH2 or any


Tridentates, S—O Tetradentates)
organic functional group wherein the number of



carbon atoms ranges from 0 to 40, optionally



having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #11:
(R—O—)(R′—)P(═S)—NH—P(═O)(—R′′)(—O—R′′′);


Monothioimidodiphosphonic Acids,
(R—S—)(R′—)P(═S)—NH—P(═O)(—R′′)(—O—R′′′);


Monothiohydrazidodiphosphonic Acids,
or (R—S—) (R′—)P(═S)—NH—P(═O)(—R′′)(—S—R′′′)


Bis(monothioimidodiphosphonic Acids),
for


Bis(monothiohydrazidodiphosphonic
monothioimidodiphosphonic acids, and —NH—NH-


Acids), Poly(monothioimidodiphosphonic
derivatives for


Acid),
monothiohydrazidodiphosphonic acids, where


Poly(monothiohydrazidodiphosphonic
R, R′,R′′, and R′′′ represent H, NH2 or any


Acids), and derivatives thereof (S—O
organic functional group wherein the number of


Bidentates, S—O Tridentates, S—O
carbon atoms ranges from 0 to 40, optionally


Tetradentates)
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #12:
(RR′—N—)(R′′—)P(═S)—NH—P(═O)(—R′′′)(—N—R′′′′R′′′′′)


Monothioimidodiphosphonamides,
for monothioimidodiphosphonamides,


Monothiohydrazidodiphosphonamides,
and —NH—NH-derivatives for


Bis(monothioimidodiphosphonamides),
monothiohydrazidodiphosphonamides, where R,


Bis(monothiohydrazidodiphosphonamides)
R′, R′′, R′′′, R′′′′, and R′′′′′, represent H, NH2 or


Poly(monothioimidodiphosphonamides),
any organic functional group wherein the


and
number of carbon atoms ranges from 0 to 40,


Poly(monothiohydrazidodiphosphonamides)
optionally having halogen or polarizing or


(S—O Bidentates, S—O Tridentates, S—O
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #13:
(RR′—N—)(R′′—)P(═S)—S—P(═O)(—R′′′)(—N—R′′′′R′′′′′),


Monothiodiphosphonamides,
or (RR′—N—)(R′′—)P(═S)—O—P(═O)(—R′′′)(—N—R′′′′R′′′′′),


Bis(monothioiphosphonamides), and
where R, R′, R′′, R′′′, R′′′′,


Poly(monothiodiphosphonamides) (S—O
and R′′′′′ represent H, NH2 or any organic


Bidentates, S—O Tridentates, S—O
functional group wherein the number of carbon


Tetradentates)
atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #14:
(R—O—)(R′—)P(═S)—O—P(═O)(—R′′)(—O—R′′′);


Monothiodiphosphonic Acids,
(R—O—)(R′—)P(═S)—S—P(═O)(—R′′)(—O—R′′′);


Bis(monothioiphosphonic Acids),
(R—S—)(R′—)P(═S)—O—P(═O)(—R′′)(—S—R′′′);


Poly(monothiodiphosphonic Acids), and
or (R—S—)(R′—)P(═S)—S—P(═O)(—R′′)(—S—R′′′),


derivatives thereof (S—O Bidentates, S—O
where R,


Tridentates, S—O Tetradentates)
R′, R′′, and R′′′ represent H, NH2 or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #15:
(RR′—N—)(R′′—)P(═S)—S—S—P(═O)(—R′′′)(—N—R′′′′R′′′′′),


Monothioperoxydiphosphonamide,
where R, R′, R′′, R′′′, R′′′′, and R′′′′′


Bis(monothioperoxyphosphonamide), and
represent H, NH2 or any organic functional


Poly(monothioperoxydiphosphonamide) (S—O
group wherein the number of carbon atoms


Bidentates, S—O Tridentates, S—O
ranges from 0 to 40, optionally having halogen


Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #16:
(R—O—)(R′—)P(═S)—S—S—P(═O)(—R′′)(—O—R′′′); or


Monothioperoxydiphosphonic Acids,
(R—S—)(R′—)P(═S)—S—S—P(═O)(—R′′)(—S—R′′′),


Bis(monothioperoxyphosphonic Acids),
where R, R′, R′′, and R′′′ represent H, NH2 or


Poly(monothioperoxydiphosphonic Acids),
any organic functional group wherein the


and derivatives thereof (S—O Bidentates, S—O
number of carbon atoms ranges from 0 to 40,


O Tridentates, S—O Tetradentates)
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #17:
(O═)P(—S—R)(—O—R′)(—O—R′′) or (S═)P(—O—R)(—O—R′)(—O—R′′),


Monothiophosphoric Acids
where R, R′, and R′′ represent H,


(Phosphorothioic Acids),
NH2 or any organic functional group wherein


Bis(monothiophosphoric acids),
the number of carbon atoms ranges from 0 to


Poly(monothiophosphoric acids), and
40, optionally having halogen or polarizing or


derivatives thereof (S—O Bidentates, S—O
water-insolubilizing/solubilizing groups


Tridentates, S—O Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #18:
(O═)P(—S—S—R)(—O—R′)(—O—R′′), where R, R′,


Phosphoro(dithioperoxoic) Acids,
and R′′ represent H, NH2 or any organic


Bis[phosphoro(dithioperoxoic) acids],
functional group wherein the number of carbon


Poly[phosphoro(dithioperoxoic) acids], and
atoms ranges from 0 to 40, optionally having


derivatives thereof (S—O Bidentates, S—O
halogen or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #19:
(O═)PR(—S—R′)(—O—R′′) or (S═)PR(—O—R′)(—O—R′′),


Monothiophosphonic Acids
where R, R′, and R′′ represent H, NH2 or


(Phosphonothioic Acids),
any organic functional group wherein the


Bis(monothiophosphonic Acids),
number of carbon atoms ranges from 0 to 40,


Poly(monothiophosphonic Acids), and
optionally having halogen or polarizing or


derivatives thereof (S—O Bidentates, S—O
water-insolubilizing/solubilizing groups


Tridentates, S—O Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #20:
(O═)PR(—S—S—R′)(—O—R′′), where R, R′, and R′′


Phosphono(dithioperoxoic) Acids,
represent H, NH2 or any organic functional


Bis[phosphono(dithioperoxoic) Acids],
group wherein the number of carbon atoms


Poly[phosphono(dithioperoxoic) Acids],
ranges from 0 to 40, optionally having halogen


and derivatives thereof (S—O Bidentates, S—O
or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #21:
R—CR′(—OH)—CH2—C(═S)—R′′, where R, R′, and


Beta-Hydroxythioketones, Beta-
R′′ represent H, NH2 or any organic functional


Hydroxythioaldehydes, Bis(beta-
group wherein the number of carbon atoms


hydroxythioketones), Bis(beta-
ranges from 0 to 40, optionally having halogen


hydroxythioaldehydes), Poly(beta-
or polarizing or water-


hydroxythioketones), and Poly(beta-
insolubilizing/solubilizing groups attached.


hydroxythioaldehydes) (S—O Bidentates, S—O
Ligand can also contain nonbinding N, O, S, or


Tridentates, S—O Tetradentates)
P atoms.


S—O Valence Stabilizer #22:
R—CR′(—SH)—CH2—C(═O)—R′′, where R, R′, and


Beta-Mercaptoketones, Beta-
R′′ represent H, NH2 or any organic functional


Mercaptoaldehydes, Bis(beta-
group wherein the number of carbon atoms


mercaptoketones), Bis(beta-
ranges from 0 to 40, optionally having halogen


mercaptoaldehydes), Poly(beta-
or polarizing or water-


mercaptoketones), and Poly(beta-
insolubilizing/solubilizing groups attached.


mercaptoaldehydes) (S—O Bidentates, S—O
Ligand can also contain nonbinding N, O, S, or


Tridentates, S—O Tetradentates)
P atoms.


S—O Valence Stabilizer #23:
RR′—N—CH(—OH)—NR′′—C(═S)—NR′′′R′′′′, where


N-(Aminomethylol)thioureas [N-
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


(Aminohydroxymethyl)thioureas], Bis[N-
organic functional group wherein the number of


(aminomethylol)thioureas], and Poly[N-
carbon atoms ranges from 0 to 40, optionally


(aminomethylol)thioureas] (S—O Bidentates,
having halogen or polarizing or water-


S—O Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #24:
RR′—N—CH(—SH)—NR′′—C(═O)—NR′′′R′′′′, where


N-(Aminomethylthiol)ureas [N-
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


(Aminomercaptomethyl)ureas], Bis[N-
organic functional group wherein the number of


(aminomethylthiol)ureas], and Poly[N-
carbon atoms ranges from 0 to 40, optionally


(aminomethylthiol)ureas] (S—O Bidentates,
having halogen or polarizing or water-


S—O Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #25:
RR′—N—C(═S)—C(═O)—N—R′′R′′′, where R, R′,


Monothiooxamides,
R′′, and R′′′ represent H, NH2 any organic


Bis(monothiooxamides), and
functional group wherein the number of carbon


Poly(monothiooxamides) (S—O Bidentates,
atoms ranges from 0 to 40, optionally having


S—O Tridentates, S—O Tetradentates)
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #26:
R—CR′(—SH)—CR′′R′′′—C(═O)(—O—R′′′′), where R,


Beta-Mercapto Carboxylic Acids, Bis(Beta-
R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


Mercapto Carboxylic Acids), Poly(Beta-
organic functional group wherein the number of


Mercapto Carboxylic Acids), and
carbon atoms ranges from 0 to 40, optionally


derivatives thereof (S—O Bidentates, S—O
having halogen or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #27:
R—CR′(—SH)—CR′′R′′′—C(═O)(—S—R′′′′), where R,


Beta-Mercapto Thiocarboxylic Acids,
R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


Bis(Beta-Mercapto Thiocarboxylic Acids),
organic functional group wherein the number of


Poly(Beta-Mercapto Thiocarboxylic Acids),
carbon atoms ranges from 0 to 40, optionally


and derivatives thereof (S—O Bidentates, S—O
having halogen or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #28:
R—CR′(—OH)—CR′′R′′′—C(═O)(—S—R′′′′), where R,


Beta-Hydroxy Thiocarboxylic Acids,
R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


Bis(Beta-Hydroxy Thiocarboxylic Acids),
organic functional group wherein the number of


Poly(Beta-Hydroxy Thiocarboxylic Acids),
carbon atoms ranges from 0 to 40, optionally


and derivatives thereof (S—O Bidentates, S—O
having halogen or polarizing or water-


Tridentates, S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #29:
R—CR′(—SH)—CR′′R′′′—C(═O)(—NH—R′′′′), where


Beta-Mercapto Carboxamides, Bis(Beta-
R, R′, R′′, R′′′, and R′′′′ represent H, NH2 or any


Mercapto Carboxamides), Poly(Beta-
organic functional group wherein the number of


Mercapto Carboxamides), and derivatives
carbon atoms ranges from 0 to 40, optionally


thereof (S—O Bidentates, S—O Tridentates,
having halogen or polarizing or water-


S—O Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #30:
R—S—R′COOH for S-alkylthiocarboxylic and S-


S-Alkylthiocarboxylic Acids, S-
arylthiocarboxylic acids, and HOOCR—S—R′COOH


Arylthiocarboxylic Acids, and S,S-
for S,S-thiobiscarboxylic acids, where


thiobiscarboxylic Acids (S—O Bidentates
R and R′ represent H or any organic functional


and S—O Tridentates)
group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #31:
R—S—S—R′COOH for S-alkyldisulfidocarboxylic


S-Alkyldisulfidocarboxylic Acids, S-
and S-aryldisulfidocarboxylic acids, and


Aryldisulfidocarboxylic Acids, and S,S′-
HOOCR—S—S—R′COOH for S,S′-


Disulfidobiscarboxylic Acids (S—O
disulfidobiscarboxylic acids, where R and R′


Bidentates and S—O Tridentates)
represent H or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 40, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, O, S, or P atoms.


S—O Valence Stabilizer #32:
R—C(═O)(—S—R′) for monothiomonocarboxylic


Monothiomonocarboxylic Acids,
acids, and (R—S—)(O═)C—R′—C(═O)(—S—R′′) or (R—S—)(O═)C—R′—C(═O)(—O—R′′)


Dithiodicarboxylic Acids,
for


Bis(monothiomonocarboxylic Acids),
dithiodicarboxylic acids, where R, R′, and R′′


Bis(dithiodicarboxylic acids),
represent H, NH2 or any organic functional


Poly(monothiomonocarboxylic acids),
group wherein the number of carbon atoms


Poly(dithiodicarboxylic acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (S—O Bidentates and S—O
or polarizing or water-


Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #33:
R—O—C(═S)—O—R′, where R, and R′ represent H,


Monothiocarbonates and
NH2 or any organic functional group wherein


Bis(monothiocarbonates) (S—O Bidentates
the number of carbon atoms ranges from 0 to


and S—O Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #34:
RR′N—NR′′—C(═O)(SH), where R and R′


Monothiocarbazates (Monothiocarbazides),
represent H, NH2 or any organic functional


Bis(monothiocarbazates), and
group wherein the number of carbon atoms


Poly(monothiocarbazates) (S—O Bidentates,
ranges from 0 to 40, optionally having halogen


S—O Tridentates, and S—O Tetradentates; or
or polarizing or water-


possibly N—S Bidentates, N—S Tridentates,
insolubilizing/solubilizing groups attached.


and N—S Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #35:
R—CH(—SH)—CH(—OH)—R′ for alpha-mercapto


Mercapto Alcohols and
alcohols, R—CH(—SH)—Si(—OR′)x—R′′3-x for alpha-


Silylmercaptoalcohols, Bis(mercapto
silylmercaptoalcohols, R—CH(—SH)—R′—CH(—OH)—R′′


alcohols and silylmercaptoalcohols), and
for beta-mercapto alcohols, and R—CH(—SH)—R′—Si(—OR′′)x—R′′′3-x


Poly(mercapto alcohols and
for beta-


silylmercaptoalcohols) (S—O Bidentates, S—O
silylmercaptoalcohols, etc., where R, R′, R′′,


Tridentates, S—O Tetradentates)
and R′′′ represent H, NH2 or any organic



functional group wherein the number of carbon



atoms ranges from 0 to 40, optionally having



halogen or polarizing or water-



insolubilizing/solubilizing groups attached. x = 1–3.



Ligand can also contain nonbinding N, O,



S, or P atoms.


S—O Valence Stabilizer #36:
RN═C(OH)(SH), where R represents H, NH2 or


Monothiocarbimates,
any organic functional group wherein the


Bis(monothiocarbimates), and
number of carbon atoms ranges from 0 to 40,


Poly(monothiocarbimates) (S—O Bidentates,
optionally having halogen or polarizing or


S—O Tridentates, and S—O Tetradentates)
water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


S—O Valence Stabilizer #37:
R—O—C(—S—R′′)—O—R′, where R, R′, and R′′


Alkyl- and Aryl-Monothioborates and
represent H, NH2 or any organic functional


Bis(monothioborates) (S—O Bidentates and
group wherein the number of carbon atoms


S—O Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #38:
R—C(—S—R′′)—O—R′, where R, R′, and R′′


Alkyl- and Aryl- Monothioboronates and
represent H, NH2 or any organic functional


Bis(monothioboronates) (S—O Bidentates
group wherein the number of carbon atoms


and S—O Tetradentates)
ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #39:
(O═)As(—S—R)(—O—R′)(—O—R′′) or (S═)As(—O—R)(—O—R′)(—O—R′′),


Monothioarsonic Acids (Arsonothioic
where R, R′, and R′′


Acids), Bis(monothioarsonic acids),
represent H, NH2 or any organic functional


Poly(monothioarsonic acids), and
group wherein the number of carbon atoms


derivatives thereof (S—O Bidentates, S—O
ranges from 0 to 40, optionally having halogen


Tridentates, S—O Tetradentates)
or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


S—O Valence Stabilizer #40:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
sulfur atoms. In addition, ligand contains


Sulfur Atoms at least one additional
additional oxygen-containing substituents


Oxygen Atom Binding Site not in a Ring
(usually hydroxy, carboxy, or carbonyl groups)


(S—O Bidentates, S—O Tridentates, S—O
that constitute O binding sites. Can include


Tetradentates, or S—O Hexadentates)
other ring systems bound to the heterocyclic



ring or to the O-containing substituent, but they



do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



N, P, As or Se atoms. This 5-membered ring(s)



and/or attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S—O Valence Stabilizer #41:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
oxygen atoms. In addition, ligand contains


Oxygen Atoms at least one additional
additional sulfur-containing substituents


Sulfur Atom Binding Site not in a Ring (S—O
(usually thio, mercapto, or thiocarbonyl groups)


Bidentates, S—O Tridentates, S—O
that constitute S binding sites. Can include


Tetradentates, or S—O Hexadentates)
other ring systems bound to the heterocyclic



ring or to the S-containing substituent, but they



do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



N, P, As or Se atoms. This 5-membered ring(s)



and/or attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S—O Valence Stabilizer #42:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
sulfur atoms. In addition, ligand contains


Sulfur Atoms at least one additional
additional oxygen-containing rings that


Oxygen Atom Binding Site in a separate
constitute O binding sites. Can include other


Ring (S—O Bidentates, S—O Tridentates, S—O
ring systems bound to the O-containing


Tetradentates, or S—O Hexadentates)
heterocyclic rings, but they do not coordinate



with the stabilized, high valence metal ion.



Ring(s) can also contain O, N, P, As, or Se



atoms. This 5-membered ring(s) and/or



additional O-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S—O Valence Stabilizer #43:
Macrocyclic ligands containing two to ten sulfur


Two-, Three-, Four-, Five-, Six-, Seven-,
or oxygen binding sites to valence stabilize the


Eight-, Nine-, and Ten-Membered
central metal ion. Can include other


Macrocyclics, Macrobicyclics, and
hydrocarbon or ring systems bound to this


Macropolycyclics (including Catapinands,
macrocyclic ligand, but they do not coordinate


Cryptands, Cyclidenes, and Sepulchrates)
with the stabilized, high valence metal ion. This


wherein all Binding Sites are composed of
ligand and/or attached, uncoordinating


Sulfur (usually thiol, mercapto, or
hydrocarbons/rings may or may not have


thiocarbonyl groups) or Oxygen (hydroxy,
halogen or polarizing or water-


carboxy, or carbonyl groups) and are not
insolubilizing/solubilizing groups attached.


contained in Component Heterocyclic


Rings (S—O Bidentates, S—O Tridentates, S—O


Tetradentates, and S—O Hexadentates)


S—O Valence Stabilizer #44:
Macrocyclic ligands containing a total of four to


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
ten five-membered heterocyclic rings containing


Ten-Membered Macrocyclics,
sulfur or oxygen binding sites. Can include


Macrobicyclics, and Macropolycyclics
other hydrocarbon/ring systems bound to this


(including Catapinands, Cryptands,
macrocyclic ligand, but they do not coordinate


Cyclidenes, and Sepulchrates) wherein all
with the stabilized, high valence metal ion. This


Binding Sites are composed of Sulfur or
ligand and/or attached, uncoordinating


Oxygen and are contained in Component 5-
hydrocarbon/rings may or may not have halogen


Membered Heterocyclic Rings (S—O
or polarizing or water-insolubilizing groups


Tridentates, S—O Tetradentates or S—O
attached.


Hexadentates)


S—O Valence Stabilizer #45:
Macrocyclic ligands containing at least one


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
heterocyclic ring. These heterocyclic rings


Ten-Membered Macrocyclics,
provide sulfur or oxygen binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
thiol, mercapto, thiocarbonyl, hydroxy, carboxy,


Cyclidenes, and Sepulchrates) wherein all
or carbonyl binding sites can also be included in


Binding Sites are composed of Sulfur or
the macrocyclic ligand, so long as the total


Oxygen and are contained in a Combination
number of binding sites is four to ten. Can


of Heterocyclic Rings and Thiol, Mercapto,
include other hydrocarbon/ring systems bound


Thiocarbonyl, Hydroxy, Carboxy, and
to this macrocyclic ligand, but they do not


Carbonyl Groups (S—O Tridentates, S—O
coordinate with the stabilized, high valence


Tetradentates, or S—O Hexadentates)
metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


S—O Valence Stabilizer #46:
Sulfoxides (R—SO—R′), where R and R′


Sulfoxides (S—O Bidentates)
represent H or any organic functional group



wherein the number of carbon atoms ranges



from 0 to 35, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


S—O Valence Stabilizer #47:
Sulfones (R—SO2—R′), where R and R′ represent


Sulfones (S—O Bidentates)
H or any organic functional group wherein the



number of carbon atoms ranges from 0 to 35,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached.


S—O Valence Stabilizer #48:
Sulfur dioxide ligands (—SO2) bound directly to


Sulfur dioxide (SO2) ligands (S—O
the high valence metal ion.


Bidentates)


N—P Valence Stabilizer #1:
[R(—NR′R′′)(—PR′′′R′′′′)], [R(—NR′R′′)x]1–3P, [R(—NR′R′′)x]1–3PX,


Aminoaryl Phosphines and Iminoaryl
or [R(—PR′R′′)x]1–3N, where X = O


Phosphines (N—P Bidentates, N—P
or S and R, R′, R′′, R′′′, and R′′′′ represents


Tridentates, and N—P Tetradentates)
H, NH2 or any organic functional group wherein



the number of carbon atoms ranges from 0 to



35, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, O, S, or Se atoms.


N—P Valence Stabilizer #2:
Five membered heterocyclic ring(s) containing


Heterocyclic Rings containing One, Two,
one, two, three, or four nitrogen atoms. In


Three, or Four Nitrogen Atoms at least one
addition, ligand contains additional phosphorus-


additional Phosphorus Atom Binding Site
containing substituents that constitute P binding


not in a Ring (N—P Bidentates, N—P
sites. Can include other ring systems bound to


Tridentates, N—P Tetradentates, or N—P
the heterocyclic ring or to the P-containing


Hexadentates)
substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This ring(s)



and/or attached, uncoordinating rings and/or P-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—P Valence Stabilizer #3:
Five membered heterocyclic ring(s) containing


Heterocyclic Rings containing One, Two,
one, two, or three phosphorus atoms. In


or Three Phosphorus Atoms at least one
addition, ligand contains additional nitrogen-


additional Nitrogen Atom Binding Site not
containing substituents (usually amines, imines,


in a Ring (N—P Bidentates, N—P Tridentates,
or hydrazides) that constitute N binding sites.


N—P Tetradentates, or N—P Hexadentates)
Can include other ring systems bound to the



heterocyclic ring or to the N-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This ring(s)



and/or attached, uncoordinating rings and/or N-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—P Valence Stabilizer #4:
Heterocyclic ring(s) containing one, two, three,


Heterocyclic Rings containing One, Two,
or four nitrogen atoms. In addition, ligand


Three, or Four Nitrogen Atoms at least one
contains additional phosphorus-containing rings


additional Phosphorus Atom Binding Site
that constitute P binding sites. Can include


in a Separate Ring (N—P Bidentates, N—P
other ring systems bound to the N- or P-


Tridentates, N—P Tetradentates)
containing heterocyclic rings, but they do not



coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, S, or P



atoms. This ring(s) and/or additional P-



containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


N—P Valence Stabilizer #5:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Five-, Six-, Seven-,
five, six, seven, eight, nine, or ten binding sites


Eight-, Nine-, and Ten-Membered
composed of nitrogen and phosphorus to


Macrocyclics, Macrobicyclics, and
valence stabilize the central metal ion. Can


Macropolycyclics (including Catapinands,
include other hydrocarbon or ring systems


Cryptands, Cyclidenes, and Sepulchrates)
bound to this macrocyclic ligand, but they do


wherein all Binding Sites are composed of
not coordinate with the stabilized, high valence


Nitrogen (usually amine or imine groups) or
metal ion. This ligand and/or attached,


Phosphorus and are not contained in
uncoordinating hydrocarbons/rings may or may


Component Heterocyclic Rings (N—P
not have halogen or polarizing or water-


Bidentates, N—P Tridentates, N—P
insolubilizing/solubilizing groups attached.


Tetradentates, and N—P Hexadentates)


N—P Valence Stabilizer #6:
Macrocyclic ligands containing a total of four,


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
five, six, seven, eight, nine, or ten heterocyclic


Ten-Membered Macrocyclics,
rings containing nitrogen or phosphorus binding


Macrobicyclics, and Macropolycyclics
sites. Can include other hydrocarbon/ring


(including Catapinands, Cryptands,
systems bound to this macrocyclic ligand, but


Cyclidenes, and Sepulchrates) wherein all
they do not coordinate with the stabilized, high


Binding Sites are composed of Nitrogen or
valence metal ion. This ligand and/or attached,


Phosphorus and are contained in
uncoordinating hydrocarbon/rings may or may


Component Heterocyclic Rings (N—P
not have halogen or polarizing or water-


Bidentates, N—P Tridentates, N—P
insolubilizing groups attached.


Tetradentates, or N—P Hexadentates)


N—P Valence Stabilizer #7:
Macrocyclic ligands containing at least one


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
heterocyclic ring. These heterocyclic rings


Ten-Membered Macrocyclics,
provide nitrogen or phosphorus binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
amine, imine, or phosphine binding sites can


Cyclidenes, and Sepulchrates) wherein all
also be included in the macrocyclic ligand, so


Binding Sites are composed of Nitrogen or
long as the total number of binding sites is four,


Phosphorus and are contained in a
five, six, seven, eight, nine, or ten. Can include


Combination of Heterocyclic Rings and
other hydrocarbon/ring systems bound to this


Amine, Imine, and Phosphine Groups (N—P
macrocyclic ligand, but they do not coordinate


Bidentates, N—P Tridentates, N—P
with the stabilized, high valence metal ion. This


Tetradentates, or N—P Hexadentates)
ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


S—P Valence Stabilizer #1:
[R(—SR′)x]1–3P, [R(—SR′)x]1–3PX, [R(—PR′R′′)(—SR′′′)],


Thioaryl Phosphines (S—P Bidentates, S—P
[R(—PR′R′′)(—S—S—R′′′)], [R(—PR′R′′)(—C(═S)R′′′],


Tridentates, and S—P Tetradentates)
[R(—PR′R′′)x]2S, [R(—PR′R′′)x]2–3R′′′(—SR′′′′)y,



[R(—SR′)x]2–3R′′(—PR′′′R′′′′)y, [R(—PR′R′′)x]2S2,



and [R(—PR′R′′)x]2R′′′(C(═S))yR′′′′,



where X = O or S, and R, R′, R′′, R′′′, and R′′′′



represent H, NH2, or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 40, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached, and



x = 1–2 and y = 1–4. Ligand can also contain



nonbinding N, O, S, or P atoms.


S—P Valence Stabilizer #2:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
sulfur atoms. In addition, ligand contains


Sulfur Atoms at least one additional
additional phosphorus-containing substituents


Phosphorus Atom Binding Site not in a
that constitute P binding sites. Can include


Ring (P—S Bidentates, P—S Tridentates, P—S
other ring systems bound to the heterocyclic


Tetradentates, or P—S Hexadentates)
ring or to the P-containing substituent, but they



do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



S, or P atoms. This ring(s) and/or attached,



uncoordinating rings and/or P-containing



substituent(s) may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


S—P Valence Stabilizer #3:
Heterocyclic ring(s) containing one, two, or


Heterocyclic Rings containing One, Two,
three phosphorus atoms. In addition, ligand


or Three Phosphorus Atoms at least one
contains additional sulfur-containing


additional Sulfur Atom Binding Site not in
substituents (usually thiol, mercapto, or


a Ring (S—P Bidentates, S—P Tridentates, S—P
thiocarbonyl groups) that constitute S binding


Tetradentates, or S—P Hexadentates)
sites. Can include other ring systems bound to



the heterocyclic ring or to the S-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This ring(s)



and/or attached, uncoordinating rings and/or S-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S—P Valence Stabilizer #4:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
sulfur atoms. In addition, ligand contains


Sulfur Atoms at least one additional
additional phosphorus-containing rings that


Phosphorus Atom Binding Site in a
constitute P binding sites. Can include other


Separate Ring (S—P Bidentates, S—P
ring systems bound to the S- or P-containing


Tridentates, S—P Tetradentates)
heterocyclic rings, but they do not coordinate



with the stabilized, high valence metal ion.



Ring(s) can also contain O, S, or P atoms. This



ring(s) and/or additional P-containing ring(s)



and/or attached, uncoordinating rings may or



may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


S—P Valence Stabilizer #5:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Five-, Six-, Seven-,
five, six, seven, eight, nine, or ten binding sites


Eight-, Nine-, and Ten-Membered
composed of sulfur and phosphorus to valence


Macrocyclics, Macrobicyclics, and
stabilize the central metal ion. Can include other


Macropolycyclics (including Catapinands,
hydrocarbon or ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Sulfur (usually thiol, mercapto, or
ligand and/or attached, uncoordinating


thiocarbonyl groups) or Phosphorus and are
hydrocarbons/rings may or may not have


not contained in Component Heterocyclic
halogen or polarizing or water-


Rings (S—P Bidentates, S—P Tridentates, S—P
insolubilizing/solubilizing groups attached.


Tetradentates, and S—P Hexadentates)


S—P Valence Stabilizer #6:
Macrocyclic ligands containing a total of four,


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
five, six, seven, eight, nine, or ten heterocyclic


Ten-Membered Macrocyclics,
rings containing sulfur or phosphorus binding


Macrobicyclics, and Macropolycyclics
sites. Can include other hydrocarbon/ring


(including Catapinands, Cryptands,
systems bound to this macrocyclic ligand, but


Cyclidenes, and Sepulchrates) wherein all
they do not coordinate with the stabilized, high


Binding Sites are composed of Sulfur or
valence metal ion. This ligand and/or attached,


Phosphorus and are contained in
uncoordinating hydrocarbon/rings may or may


Component Heterocyclic Rings (S—P
not have halogen or polarizing or water-


Bidentates, S—P Tridentates, S—P
insolubilizing groups attached.


Tetradentates, or S—P Hexadentates)


S—P Valence Stabilizer #7:
Macrocyclic ligands containing at least one


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
heterocyclic ring. These heterocyclic rings


Ten-Membered Macrocyclics,
provide sulfur or phosphorus binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
thiol, mercapto, or thiocarbonyl, or phosphine


Cyclidenes, and Sepulchrates) wherein all
binding sites can also be included in the


Binding Sites are composed of Sulfur or
macrocyclic ligand, so long as the total number


Phosphorus and are contained in a
of binding sites is four, five, six, seven, eight,


Combination of Heterocyclic Rings and
nine, or ten. Can include other


Thiol, Mercapto, Thiocarbonyl or
hydrocarbon/ring systems bound to this


Phosphine Groups (S—P Bidentates, S—P
macrocyclic ligand, but they do not coordinate


Tridentates, S—P Tetradentates, or S—P
with the stabilized, high valence metal ion. This


Hexadentates)
ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


P—O Valence Stabilizer #1:
[R(—OR′)x]1–3P, [R(—OR′)x]1–3PX, [R(—PR′R′′)(—OR′′′)],


Hydroxyaryl Phosphines (P—O Bidentates,
[R(—PR′R′′)(—C(═O)R′′′], [R(—PR′R′′)x]2O,


P—O Tridentates, and P—O Tetradentates)
[R(—PR′R′′)x]2–3R′′′(—OR′′′′)y, [R(—OR′)x]2–3R′′(—PR′′′R′′′′)y,



and [R(—PR′R′′)x]2R′′′(C(═O))yR′′′′,



where X = O or S,



and R, R′, R′′, R′′′, and R′′′′ represent H, NH2,



or any organic functional group wherein the



number of carbon atoms ranges from 0 to 40,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached, and x = 1–2 and y = 1–4. Ligand can



also contain nonbinding N, O, S, or P atoms.


P—O Valence Stabilizer #2:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
oxygen atoms. In addition, ligand contains


Oxygen Atoms at least one additional
additional phosphorus-containing substituents


Phosphorus Atom Binding Site not in a
that constitute P binding sites. Can include


Ring (P—O Bidentates, P—O Tridentates, P—O
other ring systems bound to the heterocyclic


Tetradentates, or P—O Hexadentates)
ring or to the P-containing substituent, but they



do not coordinate with the stabilized, high



valence metal ion. Ring(s) can also contain O,



S, or P atoms. This ring(s) and/or attached,



uncoordinating rings and/or P-containing



substituent(s) may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


P—O Valence Stabilizer #3:
Heterocyclic ring(s) containing one, two, or


Heterocyclic Rings containing One, Two,
three phosphorus atoms. In addition, ligand


or Three Phosphorus Atoms at least one
contains additional oxygen-containing


additional Oxygen Atom Binding Site not
substituents (usually hydroxy, carboxy, or


in a Ring (P—O Bidentates, P—O Tridentates,
carbonyl groups) that constitute O binding sites.


P—O Tetradentates, or P—O Hexadentates)
Can include other ring systems bound to the



heterocyclic ring or to the O-containing



substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, S, or P atoms. This ring(s)



and/or attached, uncoordinating rings and/or O-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P—O Valence Stabilizer #4:
Heterocyclic ring(s) containing one or two


Heterocyclic Rings containing One or Two
oxygen atoms. In addition, ligand contains


Oxygen Atoms at least one additional
additional phosphorus-containing rings that


Phosphorus Atom Binding Site in a
constitute P binding sites. Can include other


Separate Ring (P—O Bidentates, P—O
ring systems bound to the O- or P-containing


Tridentates, P—O Tetradentates)
heterocyclic rings, but they do not coordinate



with the stabilized, high valence metal ion.



Ring(s) can also contain O, S, or P atoms. This



ring(s) and/or additional P-containing ring(s)



and/or attached, uncoordinating rings may or



may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


P—O Valence Stabilizer #5:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, Five-, Six-, Seven-,
five, six, seven, eight, nine, or ten binding sites


Eight-, Nine-, and Ten-Membered
composed of oxygen and phosphorus to valence


Macrocyclics, Macrobicyclics, and
stabilize the central metal ion. Can include other


Macropolycyclics (including Catapinands,
hydrocarbon or ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Oxygen (usually hydroxy, carboxy, or
ligand and/or attached, uncoordinating


carbonyl groups) or Phosphorus and are not
hydrocarbons/rings may or may not have


contained in Component Heterocyclic
halogen or polarizing or water-


Rings (P—O Bidentates, P—O Tridentates, P—O
insolubilizing/solubilizing groups attached.


Tetradentates, and P—O Hexadentates)


P—O Valence Stabilizer #6:
Macrocyclic ligands containing a total of four,


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
five, six, seven, eight, nine, or ten heterocyclic


Ten-Membered Macrocyclics,
rings containing oxygen or phosphorus binding


Macrobicyclics, and Macropolycyclics
sites. Can include other hydrocarbon/ring


(including Catapinands, Cryptands,
systems bound to this macrocyclic ligand, but


Cyclidenes, and Sepulchrates) wherein all
they do not coordinate with the stabilized, high


Binding Sites are composed of Oxygen or
valence metal ion. This ligand and/or attached,


Phosphorus and are contained in
uncoordinating hydrocarbon/rings may or may


Component Heterocyclic Rings (P—O
not have halogen or polarizing or water-


Bidentates, P—O Tridentates, P—O
insolubilizing groups attached.


Tetradentates, or P—O Hexadentates)


P—O Valence Stabilizer #7:
Macrocyclic ligands containing at least one


Four-, Five-, Six-, Seven-, Eight-, Nine-, or
heterocyclic ring. These heterocyclic rings


Ten-Membered Macrocyclics,
provide oxygen or phosphorus binding sites to


Macrobicyclics, and Macropolycyclics
valence stabilize the central metal ion. Other


(including Catapinands, Cryptands,
hydroxy, carboxy, carbonyl, or phosphine


Cyclidenes, and Sepulchrates) wherein all
binding sites can also be included in the


Binding Sites are composed of Oxygen or
macrocyclic ligand, so long as the total number


Phosphorus and are contained in a
of binding sites is four, five, six, seven, eight,


Combination of Heterocyclic Rings and
nine, or ten. Can include other


Hydroxy, Carboxy, Carbonyl or Phosphine
hydrocarbon/ring systems bound to this


Groups (P—O Bidentates, P—O Tridentates,
macrocyclic ligand, but they do not coordinate


P—O Tetradentates, or P—O Hexadentates)
with the stabilized, high valence metal ion. This



ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


As Valence Stabilizer #1:
AsH3, AsH2R, AsHR2, where R represents H or


Monoarsines (As Monodentates) wherein at
any organic functional group wherein the


least one Arsenic Atom is a Binding Site
number of carbon atoms ranges from 0 to 25,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, As, O, S, or Se atoms.


As Valence Stabilizer #2:
R′—As—R—As—R′′, where R, R′, and R′′ represent


Diarsines (an As—As Bidentate) wherein at
H or any organic functional group wherein the


least one Arsenic Atom is a Binding Site
number of carbon atoms ranges from 0 to 25,



optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, As, O, S, or Se atoms.


As Valence Stabilizer #3:
R—As—R′—As—R′′—As—R′′′, where R, R′, R′′, and


Triarsines (either As—As Bidentates or As—As
R′′′ represent H or any organic functional group


Tridentates) wherein at least one
wherein the number of carbon atoms ranges


Arsenic Atom is a Binding Site
from 0 to 25, optionally having halogen or



polarizing or water-insolubilizing/solubilizing



groups attached. Ligand can also contain



nonbinding N, P, As, O, S, or Se atoms.


As Valence Stabilizer #4:
R—As—R′—As—R′′—As—R′′′—As—R′′′′, where R,R′,


Tetraarsines (As—As Bidentates, As—As
R′′, R′′′, and R′′′′ represent H or any organic


Tridentates, or As—As Tetradentates)
functional group wherein the number of carbon


wherein at least one Arsenic Atom is a
atoms ranges from 0 to 25, optionally having


Binding Site
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, As, O,



S, or Se atoms.


As Valence Stabilizer #5:
R—As—R′—As—R′′—As—R′′′—As—R′′′′—As—R′′′′′,


Pentaarsines (As—As Bidentates, As—As
where R, R′, R′′, R′′′, R′′′′, and R′′′′′ represent H


Tridentates, or As—As Tetradentates)
or any organic functional group wherein the


wherein at least one Arsenic Atom is a
number of carbon atoms ranges from 0 to 25,


Binding Site
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, As, O, S, or Se atoms.


As Valence Stabilizer #6:
R—As—R′—As—R′′—As—R′′′—As—R′′′′—As—R′′′′′—As—R′′′′′′,


Hexaarsines (As—As Bidentates, As—As
where R, R′, R′′, R′′′, R′′′′, R′′′′′, and


Tridentates, As—As Tetradentates, or As—As
R′′′′′′ represent H or any organic functional


Hexadentates) wherein at least one Arsenic
group wherein the number of carbon atoms


Atom is a Binding Site
ranges from 0 to 25, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, As, O,



S, or Se atoms.


As Valence Stabilizer #7:
Five membered heterocyclic ring containing just


Five-Membered Heterocyclic Rings
one arsenic binding site. Can include other ring


containing One Arsenic Atom wherein the
systems bound to this heterocyclic ring, but they


Arsenic Atom is the Binding Site (As
do not coordinate with the stabilized, high


Monodentates)
valence metal ion. Ring can also contain O, S,



N, P, or Se atoms. This 5-membered ring



and/or attached, uncoordinating rings may or



may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


As Valence Stabilizer #8:
Six membered heterocyclic ring containing just


Six-Membered Heterocyclic Rings
one arsenic binding site. Can include other ring


containing One Arsenic Atom wherein the
systems bound to this heterocyclic ring, but they


Arsenic Atom is the Binding Site (As
do not coordinate with the stabilized, high


Monodentates)
valence metal ion. Ring can also contain O, S,



N, P, or Se atoms. This 6-membered ring



and/or attached, uncoordinating rings may or



may not have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


As Valence Stabilizer #9:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one arsenic atom. In addition, ligand contains


containing One Arsenic Atom and having at
additional arsenic-containing substituents


least one additional Arsenic Atom Binding
(usually arsines) that constitute As binding sites.


Site not in a Ring (As Monodentates, As—As
Can include other ring systems bound to the


Bidentates, As—As Tridentates, As—As
heterocyclic ring or to the As-containing


Tetradentates, or As—As Hexadentates)
substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, N, S, P or Se atoms. This 5-



membered ring(s) and/or attached,



uncoordinating rings and/or As-containing



substituent(s) may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


As Valence Stabilizer #10:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one arsenic atom. In addition, ligand contains


containing One Arsenic Atom and having at
additional arsenic-containing substituents


least one additional Arsenic Atom Binding
(usually arsines) that constitute As binding sites.


Site not in a Ring (As Monodentates, As—As
Can include other ring systems bound to the


Bidentates, As—As Tridentates, As—As
heterocyclic ring or to the As-containing


Tetradentates, or As—As Hexadentates)
substituent, but they do not coordinate with the



stabilized, high valence metal ion. Ring(s) can



also contain O, N, S, P or Se atoms. This 6-



membered ring(s) and/or attached,



uncoordinating rings and/or As-containing



substituent(s) may or may not have halogen or



polarizing or water-insolubilizing/solubilizing



groups attached.


As Valence Stabilizer #11:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one arsenic atom. In addition, ligand contains


containing One Arsenic Atom and having at
additional arsenic-containing rings that


least one additional Arsenic Atom Binding
constitute As binding sites. Can include other


Site in a separate Ring (As Monodentates,
ring systems bound to the As-containing


As—As Bidentates, As—As Tridentates, As—As
heterocyclic rings, but they do not coordinate


Tetradentates, or As—As Hexadentates)
with the stabilized, high valence metal ion.



Ring(s) can also contain O, N, S, P, or Se



atoms. This 5-membered ring(s) and/or



additional As-containing ring(s) and/or



attached, uncoordinating rings may or may not



have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


As Valence Stabilizer #12:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one arsenic atom. In addition, ligand contains


containing One Arsenic Atom and having at
additional arsenic-containing rings that


least one additional Arsenic Atom Binding
constitute As binding sites. Can include other


Site in a separate Ring (As Monodentates,
ring systems bound to the As-containing


As—As Bidentates, As—As Tridentates, As—As
heterocyclic rings, but they do not coordinate


Tetradentates, or As—As Hexadentates)
with the stabilized, high valence metal ion.



Ring(s) can also contain O, N, S, P, or Se



atoms. This 6-membered ring(s) and/or



additional As-containing ring(s) and/or



attached, uncoordinating rings may or may not



have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


As Valence Stabilizer #13:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, and Six-Membered
or six arsenic binding sites to valence stabilize


Macrocyclics, Macrobicyclics, and
the central metal ion. Can include other


Macropolycyclics (including Catapinands,
hydrocarbon or ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Arsenic and are not contained in
ligand and/or attached, uncoordinating


Component Heterocyclic Rings (As—As
hydrocarbons/rings may or may not have


Bidentates, As—As Tridentates, As—As
halogen or polarizing or water-


Tetradentates, and As—As Hexadentates)
insolubilizing/solubilizing groups attached.


As Valence Stabilizer #14:
Macrocyclic ligands containing a total of four or


Four-, or Six-Membered Macrocyclics,
six five-membered heterocyclic rings containing


Macrobicyclics, and Macropolycyclics
arsenic binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Arsenic and
with the stabilized, high valence metal ion. This


are contained in Component 5-Membered
ligand and/or attached, uncoordinating


Heterocyclic Rings (As—As Tridentates, As—As
hydrocarbon/rings may or may not have halogen


Tetradentates, or As—As Hexadentates)
or polarizing or water-insolubilizing groups



attached.


As Valence Stabilizer #15:
Macrocyclic ligands containing at least one 5-


Four-, or Six-Membered Macrocyclics,
membered heterocyclic ring. These


Macrobicyclics, and Macropolycyclics
heterocyclic rings provide arsenic binding sites


(including Catapinands, Cryptands,
to valence stabilize the central metal ion. Other


Cyclidenes, and Sepulchrates) wherein all
arsine binding sites can also be included in the


Binding Sites are composed of Arsenic and
macrocyclic ligand, so long as the total number


are contained in a Combination of 5-
of binding sites is four or eight. Can include


Membered Heterocyclic Rings and Arsine
other hydrocarbon/ring systems bound to this


Groups (As—As Tridentates, As—As
macrocyclic ligand, but they do not coordinate


Tetradentates, or As—As Hexadentates)
with the stabilized, high valence metal ion. This



ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


As Valence Stabilizer #16:
Macrocyclic ligands containing a total of four or


Four-, or Six-Membered Macrocyclics,
six six-membered heterocyclic rings containing


Macrobicyclics, and Macropolycyclics
arsenic binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Arsenic and
with the stabilized, high valence metal ion. This


are contained in Component 6-Membered
ligand and/or attached, uncoordinating


Heterocyclic Rings (As—As Tridentates, As—As
hydrocarbon/rings may or may not have halogen


Tetradentates, or As—As Hexadentates)
or polarizing or water-insolubilizing groups



attached.


As Valence Stabilizer #17:
Macrocyclic ligands containing at least one 6-


Four-, or Six-Membered Macrocyclics,
membered heterocyclic ring. These


Macrobicyclics, and Macropolycyclics
heterocyclic rings provide arsenic binding sites


(including Catapinands, Cryptands,
to valence stabilize the central metal ion. Other


Cyclidenes, and Sepulchrates) wherein all
arsine binding sites can also be included in the


Binding Sites are composed of Arsenic and
macrocyclic ligand, so long as the total number


are contained in a Combination of 6-
of binding sites is four or six. Can include other


Membered Heterocyclic Rings and Arsine
hydrocarbon/ring systems bound to this


Groups (As—As Tridentates, As—As
macrocyclic ligand, but they do not coordinate


Tetradentates, or As—As Hexadentates)
with the stabilized, high valence metal ion. This



ligand and/or attached, uncoordinating



hydrocarbon/rings may or may not have halogen



or polarizing or water-insolubilizing groups



attached.


Se Valence Stabilizer #1:
SeH2, SeHR, SeR2, where R represents H or any


Monoselenoethers (Se Monodentates)
organic functional group wherein the number of


wherein at least one Selenium Atom is a
carbon atoms ranges from 0 to 25, optionally


Binding Site
having halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


Se Valence Stabilizer #2:
R—Se—R′—Se—R′′, where R, R′, and R′′ represents


Diselenoethers (Se—Se Bidentates) wherein
H or any organic functional group wherein the


at least one Selenium Atom is a Binding
number of carbon atoms ranges from 0 to 25,


Site
optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



P, O, S, or Se atoms.


Se Valence Stabilizer #3:
R—Se—R′—Se—R′′—Se—R′′′, where R, R′, R′′, and


Triselenoethers (Se—Se Bidentates or Se—Se
R′′′ represents H or any organic functional


Tridentates) wherein at least one Selenium
group wherein the number of carbon atoms


Atom is a Binding Site
ranges from 0 to 25, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


Se Valence Stabilizer #4:
R—Se—R′—Se—R′′—Se—R′′′—Se—R′′′′, where R, R′,


Tetraselenoethers (Se—Se Bidentates, Se—Se
R′′, R′′′, and R′′′′ represents H or any organic


Tridentates, or Se—Se Tetradentates)
functional group wherein the number of carbon


wherein at least one Selenium Atom is a
atoms ranges from 0 to 25, optionally having


Binding Site
halogen or polarizing or water-



insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, P, O, S,



or Se atoms.


Se Valence Stabilizer #5:
Five membered heterocyclic ring containing one


Five-Membered Heterocyclic Rings
or two selenium atoms, both of which may


containing One or Two Selenium Atoms
function as binding sites. Can include other


wherein at least one Selenium Atom is a
ring systems bound to this heterocyclic ring, but


Binding Site (Se Monodentates or Se—Se
they do not coordinate with the stabilized, high


Bidentates)
valence metal ion. Ring can also contain O, N,



P, As, or S atoms. This 5-membered ring and/or



attached, uncoordinating rings may or may not



have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #6:
Six membered heterocyclic ring containing one


Six-Membered Heterocyclic Rings
or two selenium atoms, both of which may


containing One or Two Selenium Atoms
function as binding sites. Can include other


wherein at least one Selenium Atom is a
ring systems bound to this heterocyclic ring, but


Binding Site (Se Monodentates or Se—Se
they do not coordinate with the stabilized, high


Bidentates)
valence metal ion. Ring can also contain O, N,



P, As, or S atoms. This 5-membered ring and/or



attached, uncoordinating rings may or may not



have halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #7:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one selenium atom. In addition, ligand contains


containing One Selenium Atom and having
additional selenium-containing substituents


at least one additional Selenium Atom
(usually selenols or selenoethers) that constitute


Binding Site not in a Ring (Se
Se binding sites. Can include other ring


Monodentates, Se—Se Bidentates, Se—Se
systems bound to the heterocyclic ring or to the


Tridentates, Se—Se Tetradentates, or Se—Se
Se-containing substituent, but they do not


Hexadentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, N, P, As



or S atoms. This 5-membered ring(s) and/or



attached, uncoordinating rings and/or Se-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #8:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one selenium atom. In addition, ligand contains


containing One Selenium Atom and having
additional selenium-containing substituents


at least one additional Selenium Atom
(usually selenols or selenoethers) that constitute


Binding Site not in a Ring (Se
Se binding sites. Can include other ring


Monodentates, Se—Se Bidentates, Se—Se
systems bound to the heterocyclic ring or to the


Tridentates, Se—Se Tetradentates, or Se—Se
Se-containing substituent, but they do not


Hexadentates)
coordinate with the stabilized, high valence



metal ion. Ring(s) can also contain O, N, P, As



or S atoms. This 6-membered ring(s) and/or



attached, uncoordinating rings and/or Se-



containing substituent(s) may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #9:
Five membered heterocyclic ring(s) containing


Five-Membered Heterocyclic Rings
one selenium atom. In addition, ligand contains


containing One Selenium Atom and having
additional selenium-containing rings that


at least one additional Selenium Atom
constitute Se binding sites. Can include other


Binding Site in a separate Ring (Se
ring systems bound to the Se-containing


Monodentates, Se—Se Bidentates, Se—Se
heterocyclic rings, but they do not coordinate


Tridentates, Se—Se Tetradentates, or Se—Se
with the stabilized, high valence metal ion.


Hexadentates)
Ring(s) can also contain O, N, P, As, or S



atoms. This 5-membered ring(s) and/or



additional Se-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #10:
Six membered heterocyclic ring(s) containing


Six-Membered Heterocyclic Rings
one selenium atom. In addition, ligand contains


containing One Selenium Atom and having
additional selenium-containing rings that


at least one additional Selenium Atom
constitute Se binding sites. Can include other


Binding Site in a separate Ring (Se
ring systems bound to the Se-containing


Monodentates, Se—Se Bidentates, Se—Se
heterocyclic rings, but they do not coordinate


Tridentates, Se—Se Tetradentates, or Se—Se
with the stabilized, high valence metal ion.


Hexadentates)
Ring(s) can also contain O, N, P, As, or S



atoms. This 6-membered ring(s) and/or



additional Se-containing ring(s) and/or attached,



uncoordinating rings may or may not have



halogen or polarizing or water-



insolubilizing/solubilizing groups attached.


Se Valence Stabilizer #11:
Macrocyclic ligands containing two, three, four,


Two-, Three-, Four-, or Six-Membered
or six selenium binding sites to valence stabilize


Macrocyclics, Macrobicyclics, and
the central metal ion. Can include other


Macropolycyclics (including Catapinands,
hydrocarbon or ring systems bound to this


Cryptands, Cyclidenes, and Sepulchrates)
macrocyclic ligand, but they do not coordinate


wherein all Binding Sites are composed of
with the stabilized, high valence metal ion. This


Selenium (usually selenol or selenoether
ligand and/or attached, uncoordinating


groups) and are not contained in
hydrocarbons/rings may or may not have


Component Heterocyclic Rings (Se—Se
halogen or polarizing or water-


Bidentates, Se—Se Tridentates, Se—Se
insolubilizing/solubilizing groups attached.


Tetradentates, or Se—Se Hexadentates)


Se Valence Stabilizer #12:
Macrocyclic ligands containing a total of four or


Four-, or Six-Membered Macrocyclics,
six five-membered heterocyclic rings containing


Macrobicyclics, and Macropolycyclics
selenium binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Selenium
with the stabilized, high valence metal ion. This


and are contained in Component 5-
ligand and/or attached, uncoordinating


Membered Heterocyclic Rings (Se—Se
hydrocarbon/rings may or may not have halogen


Tridentates, Se—Se Tetradentates or Se—Se
or polarizing or water-insolubilizing groups


Hexadentates)
attached.


Se Valence Stabilizer #13:
Macrocyclic ligands containing at least one 5-


Four-, or Six-Membered Macrocyclics,
membered heterocyclic ring. These


Macrobicyclics, and Macropolycyclics
heterocyclic rings provide selenium binding


(including Catapinands, Cryptands,
sites to valence stabilize the central metal ion.


Cyclidenes, and Sepulchrates) wherein all
Other selenol or selenoether binding sites can


Binding Sites are composed of Selenium
also be included in the macrocyclic ligand, so


and are contained in a Combination of 5-
long as the total number of binding sites is four


Membered Heterocyclic Rings and Selenol
or six. Can include other hydrocarbon/ring


or Selenoether Groups (Se—Se Tridentates,
systems bound to this macrocyclic ligand, but


Se—Se Tetradentates, or Se—Se
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


Se Valence Stabilizer #14:
Macrocyclic ligands containing a total of four or


Four-, or Six-Membered Macrocyclics,
six six-membered heterocyclic rings containing


Macrobicyclics, and Macropolycyclics
selenium binding sites. Can include other


(including Catapinands, Cryptands,
hydrocarbon/ring systems bound to this


Cyclidenes, and Sepulchrates) wherein all
macrocyclic ligand, but they do not coordinate


Binding Sites are composed of Selenium
with the stabilized, high valence metal ion. This


and are contained in Component 6-
ligand and/or attached, uncoordinating


Membered Heterocyclic Rings (Se—Se
hydrocarbon/rings may or may not have halogen


Tridentates, Se—Se Tetradentates, or Se—Se
or polarizing or water-insolubilizing groups


Hexadentates)
attached.


Se Valence Stabilizer #15:
Macrocyclic ligands containing at least one 6-


Four-, or Six-Membered Macrocyclics,
membered heterocyclic ring. These


Macrobicyclics, and Macropolycyclics
heterocyclic rings provide selenium binding


(including Catapinands, Cryptands,
sites to valence stabilize the central metal ion.


Cyclidenes, and Sepulchrates) wherein all
Other selenol or selenoether binding sites can


Binding Sites are composed of Selenium
also be included in the macrocyclic ligand, so


and are contained in a Combination of 6-
long as the total number of binding sites is four


Membered Heterocyclic Rings and Selenol
or six. Can include other hydrocarbon/ring


or Selenoether Groups (Se—Se Tridentates,
systems bound to this macrocyclic ligand, but


Se—Se Tetradentates, or Se—Se
they do not coordinate with the stabilized, high


Hexadentates)
valence metal ion. This ligand and/or attached,



uncoordinating hydrocarbon/rings may or may



not have halogen or polarizing or water-



insolubilizing groups attached.


Se Valence Stabilizer #16:
R—C(═Se)—CR′R′′—C(═Se)—R′′′ where R, R′, R′′,


1,3-Diselenoketones (Diseleno-beta-
and R′′′ represent H, NH2, or any organic


ketonates), 1,3,5-Triselenoketones, Bis(1,3-
functional group wherein the number of carbon


Diselenoketones), and Poly(1,3-
atoms ranges from 0 to 40, optionally having


Diselenoketones) (S—S Bidentates, S—S
halogen or polarizing or water-


Tridentates, S—S Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


Se Valence Stabilizer #17:
RR′—C═C(—Se−)(—Se−), where R and R′ represent


1,1-Diselenolates, Bis(1,1-diselenolates),
H, NH2 or any organic functional group wherein


and Poly(1,1-diselenolates) (Se—Se
the number of carbon atoms ranges from 0 to


Bidentates and Se—Se Tetradentates)
40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


Se Valence Stabilizer #18:
RR′N+═C(SeH)(SeH), where R and R′


Diselenocarbamates,
represent H, OH, SH, OR′′ (R′′ = C1–C30 alkyl or


Bis(diselenocarbamates), and
aryl), SR′′ (R′′ = C1–C30 alkyl or aryl), NH2 or


Poly(diselenocarbamates) (including N-
any organic functional group wherein the


hydroxydiselenocarbamates and N-
number of carbon atoms ranges from 0 to 40,


mercaptodiselenocarbamates) (Se—Se
optionally having halogen or polarizing or


Bidentates, Se—Se Tridentates, and Se—Se
water-insolubilizing/solubilizing groups


Tetradentates)
attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


Se Valence Stabilizer #19:
(O═)P(—Se—R)(—Se—R′)(—Se—R′′) or (Se═)P(—Se—R)(—Se—R′)(—O—R′′),


Triselenophosphoric Acids
where R, R′, and R′′


(Phosphorotriselenoic Acids),
represent H, NH2 or any organic functional


Bis(triselenophosphoric acids),
group wherein the number of carbon atoms


Poly(triselenophosphoric acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (Se—Se Bidentates, Se—Se
or polarizing or water-


Tridentates, Se—Se Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


Se Valence Stabilizer #20:
(O═)P(—Se—R)(—Se—R′)(—O—R′′) or (Se═)P(—Se—R)(—O—R′)(—O—R′′),


Diselenophosphoric Acids
where R, R′, and R′′


(Phosphorodiselenoic Acids),
represent H, NH2 or any organic functional


Bis(diselenophosphoric acids),
group wherein the number of carbon atoms


Poly(diselenophosphoric acids), and
ranges from 0 to 40, optionally having halogen


derivatives thereof (Se—Se Bidentates, Se—Se
or polarizing or water-


Tridentates, Se—Se Tetradentates)
insolubilizing/solubilizing groups attached.



Ligand can also contain nonbinding N, O, S, or



P atoms.


Se Valence Stabilizer #21:
(Se═)P(—Se—R)(—Se—R′)(—Se—R′′), where R, R′,


Tetraselenophosphoric Acids
and R′′ represent H, NH2 or any organic


(Phosphorotetraselenoic Acids),
functional group wherein the number of carbon


Bis(tetraselenophosphoric acids),
atoms ranges from 0 to 40, optionally having


Poly(tetraselenophosphoric acids), and
halogen or polarizing or water-


derivatives thereof (Se—Se Bidentates, Se—Se
insolubilizing/solubilizing groups attached.


Tridentates, Se—Se Tetradentates)
Ligand can also contain nonbinding N, O, S, or



P atoms.


Se Valence Stabilizer #22:
R—Se—C(═Se)—O—R′ or R—Se—C(═O)—Se—R′ for


Diselenocarbonates, Triselenocarbonates,
diselenocarbonates, and R—Se—C(═Se)—Se—R′ for


Bis(diselenocarbonates), and
triselenocarbonates, where R, and R′ represent


Bis(triselenocarbonates), (Se—Se Bidentates
H, NH2 or any organic functional group wherein


and Se—Se Tetradentates)
the number of carbon atoms ranges from 0 to



40, optionally having halogen or polarizing or



water-insolubilizing/solubilizing groups



attached. Ligand can also contain nonbinding N,



O, S, or P atoms.


Se Valence Stabilizer #23:
Selenocyanates bound directly to the high


Selenocyanates (Se Monodentates)
valence metal ion.


Se Valence Stabilizer #24:
Selenolates (HSe—R, HSe—R—SeH, etc.), where R


Selenolates (Se Monodentates)
and R′ represent H or any organic functional



group wherein the number of carbon atoms



ranges from 0 to 35, optionally having halogen



or polarizing or water-



insolubilizing/solubilizing groups attached.


Miscellaneous Valence Stabilizer #1:
Dialkenes or bicyclic or tricyclic hydrocarbons


Diene or bicyclic or tricyclic hydrocarbon
bound directly to the high valence metal ion.


ligands


Miscellaneous Valence Stabilizer #2:
Cyanide and cyanate and related ligands bound


Cyanide and related ligands
directly to the high valence metal ion.


Miscellaneous Valence Stabilizer #3:
Carbonyl (—CO) ligands bound directly to the


Carbonyl ligands
high valence metal ion.


Miscellaneous Valence Stabilizer #4:
Halogen (X) atoms bound directly to the high


Halogen ligands
valence metal ion.









N Valence Stabilizer #1a: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates or N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentaazacyclodecane ([10]aneN5); pentaazacycloundecane ([11]aneN5); pentaazacyclododecane ([12]aneN5); pentaazacyclotridecane ([13]aneN5); pentazaacyclotetradecane ([14]aneN5); pentaazacyclopentadecane ([15]aneN5); pentaazacyclodecatriene ([10]trieneN5); pentaazacycloundecatriene ([11]trieneN5); pentaazacyclododecatriene ([12]trieneN5); pentaazacyclotridecatriene ([13]trieneN5); pentazaacyclotetradecatriene ([14]trieneN5); and pentaazacyclopentadecatriene ([15]trieneN5).

N Valence Stabilizer #1b: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: heptaazacyclotetradecane ([14]aneN7); heptaazacyclopentadecane ([15]aneN7); heptaazacyclohexadecane ([16]aneN7); heptaazacycloheptadecane ([17]aneN7); heptaazacyclooctadecane ([18]aneN7); heptaazacyclononadecane ([19]aneN7); heptaazacycloeicosane ([20]aneN7); heptaazacycloheneicosane ([21]aneN7); heptaazacyclotetradecatriene ([14]trieneN7); heptaazacyclopentadecatriene ([15]trieneN7); heptaazacyclohexadecatriene ([16]trieneN7); heptaazacycloheptadecatriene ([17]trieneN7); heptaazacyclooctadecatriene ([18]trieneN7); heptaazacyclononadecatriene ([19]trieneN7); heptaazacycloeicosatriene ([20]trieneN7); and heptaazacycloheneicosatriene ([21]trieneN7).

N Valence Stabilizer #1c: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) and are not contained in component heterocyclic rings (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for include, but are not limited to: nonaazacyclooctadecane ([18]aneN9); nonaazacyclononadecane ([19]aneN9); nonaazacycloeicosane ([20]aneN9); nonaazacycloheneicosane ([21]aneN9); nonaazacyclodocosane ([22]aneN9); nonaazacyclotricosane ([23]aneN9); nonaazacyclotetracosane ([24]aneN9); nonaazacyclopentacosane ([25]aneN9); nonaazacyclohexacosane ([26]aneN9); nonaazacycloheptacosane ([27]aneN9); nonaazacyclooctadecatetradiene ([18]tetradieneN9); nonaazacyclononadecatetradiene ([19]tetradieneN9); nonaazacycloeicosatetradiene ([20]tetradieneN9); nonaazacycloheneicosatetradiene ([21]tetradieneN9); nonaazacyclodocosatetradiene ([22]tetradieneN9); nonaazacyclotricosatetradiene ([23]tetradieneN9); nonaazacyclotetracosatetradiene ([24]tetradieneN9); nonaazacyclopentacosatetradiene ([25]tetradieneN9); nonaazacyclohexacosatetradiene ([26]tetradieneN9); and nonaazacycloheptacosatetradiene ([27]tetradieneN9).

N Valence Stabilizer #2a: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentaphyrins (pentapyrroles); sapphyrins; smaragdyrins; pentaoxazoles; pentaisooxazoles; pentathiazoles; pentaisothiazoles; pentaazaphospholes; pentaimidazoles; pentapyrazoles; pentaoxadiazoles; pentathiadiazoles; pentadiazaphospholes; pentatriazoles; pentaoxatriazoles; and pentathiatriazoles.

N Valence Stabilizer #2b: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of nitrogen and are contained in component 5-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: heptaphyrins (heptapyrroles); heptaoxazoles; heptaisooxazoles; heptathiazoles; heptaisothiazoles; heptaazaphospholes; heptaimidazoles; heptapyrazoles; heptaoxadiazoles; heptathiadiazoles; heptadiazaphospholes; heptatriazoles; heptaoxatriazoles; and heptathiatriazoles.

N Valence Stabilizer #3a: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates or N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: superphthalocyanine; supernaphthalocyanine; diazapentaphyrins; tetraazapentaphyrins; pentaazapentaphyrins; diazapentapyrazoles; tetraazapentapyrazoles; pentaazapentapyrazoles; diazapentaimidazoles; tetraazapentaimidazoles; and pentaazapentaimidazoles.

N Valence Stabilizer #3b: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazaheptaphyrins; tetraazaheptaphyrins; hexaazaheptaphyrins; diazaheptapyrazoles; tetraazaheptapyrazoles; hexaazaheptapyrazoles; diazaheptaimidazoles; tetraazaheptaimidazoles; and hexaazaheptaimidazoles.

N Valence Stabilizer #3c: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of nitrogen and are contained in a combination of 5-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazanonaphyrins; tetraazanonaphyrins; hexaazanonaphyrins; diazanonapyrazoles; tetraazanonapyrazoles; hexaazanonapyrazoles; diazanonaimidazoles; tetraazanonaimidazoles; and hexaazanonaimidazoles.

N Valence Stabilizer #4a: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclopentapyridines; cyclopentaoxazines; cyclopentathiazines; cyclopentaphosphorins; cyclopentaquinolines; cyclopentapyrazines; cyclopentapyridazines; cyclopentapyrimidines; cyclopentaoxadiazines; cyclopentathiadiazines; cyclopentadiazaphosphorins cyclopentaquinoxalines; cyclopentatriazines; cyclopentathiatriazines; and cyclopentaoxatriazines.

N Valence Stabilizer #4b: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of nitrogen and are contained in component 6-membered heterocyclic rings (N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cycloheptapyridines; cycloheptaoxazines; cycloheptathiazines; cycloheptaphosphorins; cycloheptaquinolines; cycloheptapyrazines; cycloheptapyridazines; cycloheptapyrimidines; cycloheptaoxadiazines; cycloheptathiadiazines; cycloheptadiazaphosphorins cycloheptaquinoxalines; cycloheptatriazines; cycloheptathiatriazines; and cycloheptaoxatriazines.

N Valence Stabilizer #5a: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates or N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclopentapyridines; tetraazacyclopentapyridines; diazacyclopentaquinolines; tetraazacyclopentaquinolines; diazacyclopentapyrazines; tetraazacyclopentapyrazines; diazacyclopentapyridazines; tetraazacyclopentapyridazines; diazacyclopentapyrimidines; tetraazacyclopentapyrimidines; diazacyclopentatriazines; and tetraazacyclopentatriazines.

N Valence Stabilizer #5b: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacycloheptapyridines; tetraazacycloheptapyridines; diazacycloheptaquinolines; tetraazacycloheptaquinolines; diazacycloheptapyrazines; tetraazacycloheptapyrazines; diazacycloheptapyridazines; tetraazacycloheptapyridazines; diazacycloheptapyrimidines; tetraazacycloheptapyrimidines; diazacycloheptatriazines; and tetraazacycloheptatriazines.

N Valence Stabilizer #5c: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of nitrogen and are contained in a combination of 6-membered heterocyclic rings and amine or imine groups (N—N Tridentates, N—N Tetradentates, or N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diazacyclononapyridines; tetraazacyclononapyridines; diazacyclononaquinolines; tetraazacyclononaquinolines; diazacyclononapyrazines; tetraazacyclononapyrazines; diazacyclononapyridazines; tetraazacyclononapyridazines; diazacyclononapyrimidines; tetraazacyclononapyrimidines; diazacyclononatriazines; and tetraazacyclononatriazines.

N Valence Stabilizer #6: Examples of silylamines and silazanes (N Monodentates, N—N Bidentates, N—N Tridentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trisilylamine; N-methyldisilazane (disilylmethylamine); N,N-dimethylsilylamine; (silyldimethylamine); tris(trimethylsilyl)amine; triethylsilylamine (triethylaminosilane) (triethylsilazane); N-ethyltriethylsilylamine (triethyl-N-ethylaminosilane); di-tert-butylsilanediamine (di-tert-butyldiaminosilane); bis(methylamino)diethylsilane; tris(dimethylamino)ethylsilane; hexamethyldisilazane; N-methylhexaphenyldisilazane; hexamethylcyclotrisilazane; and octaphenylcyclotetrasilazane. [Note: Silylamines and silazanes are notably weaker ligands than their carbonaceous derivatives, although replacement of one or two SiR3 groups with CR3 will enhance the donor power of the ligand. Thus, N(CR3)2(SiR3) is a better ligand than N(CR3)(SiR3)2, etc.]

N Valence Stabilizer #7: Examples of guanidines, diguanidines, and polyguanidines (N—N bidentates, N—N tridentates, N—N tetradentates, and N—N hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: guanidine; methylguanidine; ethylguanidine; isopropylguanidine; butylguanidine; benzylguanidine; phenylguanidine; tolylguanidine; naphthylguanidine; cyclohexylguanidine; norbornylguanidine; adamantylguanidine; dimethylguanidine; diethylguanidine; diisopropylguanidine; dibutylguanidine; dibenzylguanidine; diphenylguanidine; ditolylguanidine; dinaphthylguanidine; dicyclohexylguanidine; dinorbornylguanidine; diadamantylguanidine; ethylenediguanidine; propylenediguanidine; tetramethylenediguanidine; pentamethylenediguanidine; hexamethylenediguanidine; heptamethylenediguanidine; octamethylenediguanidine; phenylenediguanidine; piperazinediguanidine; oxalyldiguanidine; malonyldiguanidine; succinyldiguanidine; glutaryldiguanidine; adipyldiguanidine; pimelyldiguanidine; suberyldiguanidine; phthalyldiguanidine; benzimidazoleguanidine; aminoguanidine; nitroaminoguanidine; dicyandiamide (cyanoguanidine); dodecylguanidine; and nitrovin.

N Valence Stabilizer #8: Examples of phosphonitrile amides and bis(phosphonitrile amides) (N—N Bidentates and N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphononitrile amide; N-phenylphosphonitrile amide; N-benzylphosphonitrile amide; N-cyclohexylphosphonitrile amide; N-norbornylphosphonitrile amide; N,N′-diphenylphosphonitrile amide; N,N′-dibenzylphosphonitrile amide; N,N′-dicyclohexylphosphonitrile amide; and N,N′-dinorbornylphosphonitrile amide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N Valence Stabilizer #9: Examples of phosphonimidic diamides, bis(phosphonimidic diamides), and poly(phosphonimidic diamides) (N—N bidentates and N—N tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonimidic diamide; N-benzylphosphonimidic diamide; N-phenylphosphonimidic diamide; N-cyclohexylphosphonimidic diamide; N-norbornylphosphonimidic diamide; N,N-dibenzylphosphonimidic diamide; N,N-diphenylphosphonimidic diamide; N,N-dicyclohexylphosphonimidic diamide; and N,N-dinorbornylphosphonimidic diamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N Valence Stabilizer #10: Examples of phosphonamidimidic acid, phosphonamidimidothioic acid, bis(phosphonamidimidic acid), bis(phosphonamidimidothioic acid), poly(phosphonamidimidic acid), poly(phosphonamidimidothioic acid), and derivatives thereof (N—N Bidentates, and N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonamidimidic acid, phosphonamidimidothioic acid; O-phenylphosphonamidimidic acid; O-benzylphosphonamidimidic acid; O-cyclohexylphosphonamidimidic acid; O-norbornylphosphonamidimidic acid; S-phenylphosphonamidimidothioic acid; S-benzylphosphonamidimidothioic acid; S-cyclohexylphosphonamidimidothioic acid; and S-norbornylphosphonamidimidothioic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N Valence Stabilizer #11: Examples of pyridinaldimines, bis(pyridinaldimines), and poly(pyridinaldimines) (N—N Bidentates, N—N Tridentates, and N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pyridylideneaniline[N-(pyridylmethylene)benzenamine]; and (2-pyridyl)benzylideneaniline.

N Valence Stabilizer #12: Examples of hydrazones, bis(hydrazones), and poly(hydrazones) (N Monodentates, N—N Bidentates, N—N Tridentates, and N—N Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetaldehyde hydrazone; acetaldehyde phenylhydrazone; acetone hydrazone; acetone phenylhydrazone; pinacolone hydrazone; pinacolone phenylhydrazone; benzaldehyde hydrazone; benzaldehyde phenylhydrazone; naphthaldehyde hydrazone; naphthaldehyde phenylhydrazone; norbornanone hydrazone; norbornanone phenylhydrazone; camphor hydrazone; camphor phenylhydrazone; nopinone hydrazone; nopinone phenylhydrazine; 2-pyridinaldehyde hydrazone; 2-pyridinealdehyde phenylhydrazone; salicylaldehyde hydrazone; salicylaldehyde phenylhydrazone; quinolinaldehyde hydrazone; quinolinaldehyde phenylhydrazone; isatin dihydrazone; isatin di(phenylhydrazone); camphorquinone dihydrazone; camphorquinone di(phenylhydrazone); and 2-hydrazinobenzimidazole hydrazone.

N Valence Stabilizer #13: Examples of azo compounds without chelate substitution at the ortho-(for aryl) or alpha- or beta- (for alkyl) positions, bis(azo compounds), or poly(azo compounds) (N Monodentates, N—N Bidentates, or N—N Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azobenzene (diphenyldiazene); p-diaminoazobenzene; p-dimethylaminoazobenzene (butter yellow); methyl orange; Fast Garnet GBC (4′-amino-2,3′-dimethylazobenzene)[Note: non-bonding methyl group in the o-position.]; and Alizarin Yellow R. [Note: Azo compounds without chelate substitution at the ortho- (for aryl) or beta- (for alkyl) positions tend to stabilize lower oxidation states in metal ions.]

N Valence Stabilizer #14: Examples of formazans, bis(formazans), and poly(formazans) without ortho-hydroxy, carboxy, thiol, mercapto, amino, or hydrazido substitution (N—N Bidentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3,5-triphenylformazan; and 1,3,5-naphthylformazan.

N Valence Stabilizer #15: Examples of hydramides (N—N Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hydrobenzamide; hydronaphthamide; and hydrosalicylamide.

N Valence Stabilizer #16: Examples of azines (including ketazines), bis(azines), and poly(azines) without ortho-hydroxy, carboxy, thiol, mercapto, amino, or hydrazido substitution (N—N Bidentates, N—N Tetradentates, and N—N Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: benzalazine; naphthalazine; cyclohexanonazine; and norbornonazine.

N Valence Stabilizer #17: Examples of Schiff Bases with one Imine (C═N) Group and without ortho- (for aryl constituents) or alpha- or beta- (for alkyl constituents) hydroxy, carboxy, carbonyl, thiol, mercapto, thiocarbonyl, amino, imino, oximo, diazeno, or hydrazido substitution (N Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-(Benzaldehydo)isopropylamine; N-(Naphthaldehydo)isopropylamine; N-(Acetophenono)isopropylamine; N-(Propiophenono)isopropylamine; N-(Benzaldehydo)cyclohexylamine; N-(Naphthaldehydo)cyclohexylamine; N-(Acetophenono)cyclohexylamine; N-(Propiophenono)cyclohexylamine; N-(Benzaldehydo)aniline (BAAN); N-(Naphthaldehydo)aniline; N-(Acetophenono)aniline; N-(Propiophenono)aniline; N-(Benzaldehydo)aminonorbornane; N-(Naphthaldehydo)aminonorbornane; N-(Acetophenono)aminonorbornane; N-(Propiophenono)aminonorbornane; (Vanillino)anisidine; (Cinnamaldehydo)anisidine; N-(o-carboxycinnamaldehydo)aniline; N-(cinnamaldehydo)aniline; N-(cinnamaldehydo)m- or p-anisidine; and N-(o-carboxycinnamaldehydo)m- or p-anisidine.

N Valence Stabilizer #18: Examples of isocyanide and cyanamide and related ligands (N Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: isocyanate (—NCO); isothiocyanate (—NCS); isoselenocyanate (—NCSe); and cyanamide (—NCN). [Note: the nitrogen atom is directly complexed to the high valence metal ion.]

N Valence Stabilizer #19: Examples of nitrosyls and nitrites and related ligands (N Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: nitrosyl (—NO); thionitrosyl (—NS); nitrite (—NO2); thionitrite (sulfinylamide)(thiazate)(—NSO); nitrosamine (═NN═O); thionitrosamine (═NN═S); nitramine (═NNO2); and thionitramine (═NNS2) ligands.

N Valence Stabilizer #20: Examples of nitriles, dinitriles, and polynitriles (N Monodentates, N—N Bidentates, N—N Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: benzonitrile; naphthonitrile; cyanonaphthalene; cyclohexyl nitrile; cyanopyridine; cyanopurine; cyanophenol; cyanothiophenol; adamantane nitrile; norbornyl nitrile; cinnamonitrile; dicyanobenzene; dicyanobutene; dicyanoimidazole; dicyanopyridine; cyanotolunitrile; tetracyanoethylene (TCNE); tetracyanoquinodimethane (TCNQ); diethylaminopropionitrile (deapn), and polyacrylonitriles.

N Valence Stabilizer #21: Examples of azide ligands (N monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azide (—N3) ions; methyl azide; ethyl azide; phenyl azide; diphenyltriazene; and phenyl sulfonyl azide.

S Valence Stabilizer #1: Examples of monothioethers (S monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hydrogen sulfide, dimethyl sulfide, diethyl sulfide, dioctyl sulfide, diphenyl sulfide, dicyclohexyl sulfide, tetramethylene sulfide (tetrahydrothiophene, tht), trimethylene sulfide, dimethylene sulfide (ethylene sulfide), pentamethylene sulfide, 1,4-thioxane, oxathiolane, cyclohexene sulfide, cyclooctene sulfide, benzotetrahydrothiophene, dibenzothiophene, naphthotetrahydrothiophene, and thiabicycloheptane.

S Valence Stabilizer #2: Examples of disulfides (S monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl disulfide, ethyl disulfide, phenyl disulfide, nitrophenide, and 1,2-dithiacyclohexane.

S Valence Stabilizer #3: Examples of dithioethers (S monodentates or S—S bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3-dithiane, 1,4-dithiane, benzodithiane, dibenzodithiane, naphthodithiane, 2,5-dithiahexane (dth); 3,6-dithiaoctane (dto); 2,5-dimethyl-3,6-dithiaoctane; 3,7-dithianonane; 2,6-dithiaheptane; 1,6-diphenyl-2,5-dithiahexane; 1,4-diphenyl-1,4-dithiabutane; 1,3-dithiolane; 1,4-dithiane (1,4-dithiacyclohexane); 1,4-dithiacycloheptane (dtch); 1,5-dithiacyclooctane (dtco); o-phenylenebis(2-thiapropane); o-phenylenebis(2-thiabutane); 2,2′-(thiamethyl)biphenyl, and 2,2′-(thiaethyl)biphenyl.

S Valence Stabilizer #4: Examples of trithioethers (S monodentates, S—S bidentates, or S—S tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3,5-trithiane; 1,3,5-tris(methylthia)cyclohexane; 1,3,5-tris(ethylthia)cyclohexane; 1,3,5-tris(phenylthia)cyclohexane; 2,5,8-trithianonane; 3,6,9-trithiaundecane; and 2,6,10-trithiaundecane.

S Valence Stabilizer #5: Examples of tetrathioethers (S monodentates, S—S bidentates, S—S tridentates, or S—S tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,4,10,13-tetrathiatridecane; 2,6,10,14-tetrathiapentadecane; 2,5,8,11-tetrathiadodecane; 2,5,9,12-ttetrathiatridecane; 2,6,9,13-tetrathiatetradecane; 1,4-(o-thiomethyl)phenyl-1,4-dithiabutane; 1,5-(o-thiomethyl)phenyl-1,5-dithiapentane; 1,6-(o-thiomethyl)phenyl-1,6-dithiahexane; 1,4-(o-thiomethyl)phenyl-1,4-dithiabut-2-ene; and polythioethers.

S Valence Stabilizer #6: Examples of hexathioethers (S monodentates, S—S bidentates, S—S tridentates, S—S tetradentates, or S—S hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-((o-thiomethyl)phenyl)ethyl)amine; and tri((o-thiomethyl)phenyl)methylamine.

S Valence Stabilizer #7a: Examples of 5-membered heterocyclic rings containing one sulfur atom (S monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydrothiophene, thiophene, thiazole, thiapyrroline, thiaphospholene, thiaphosphole, oxathiole, thiadiazole, thiatriazole, benzodihydrothiophene, benzothiophene, benzothiazole, benzothiaphosphole, dibenzothiophene, and naphthothiophene.

S Valence Stabilizer #7b: Examples of 5-membered heterocyclic rings containing two sulfur atoms (S monodentates or S—S bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiole, benzodithiole, and naphthodithiole.

S Valence Stabilizer #8a: Examples of 6-membered heterocyclic rings containing one sulfur atom (S monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydrothiopyran, thiopyran, thiazine, thiadiazine, thiaphosphorin, thiadiphosphorin, oxathiin, benzothiopyran, dibenzothiopyran, and naphthothiopyran.

S Valence Stabilizer #8b: Examples of 6-membered heterocyclic rings containing two sulfur atoms (S monodentates or S—S bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydrodithiin, dithiin, benzodithiin, dibenzodithiin (thianthrene), and naphthodithiin.

S Valence Stabilizer #9a: Examples of 5-membered heterocyclic rings containing one sulfur atom and having at least one additional sulfur atom binding site not contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,5-dimercapto-2,5-dihydrothiophene; 2,5-bis(thiomethyl)-2,5-dihydrothiophene; 2,5-bis(2-thiophenyl)-2,5-dihydrothiophene; 2,5-dimercaptothiophene; 2,5-bis(thiomethyl)thiophene; 2,5-bis(2-thiophenyl)thiophene; 2,5-dimercatothiazole; 2,5-bis(thiomethyl)thiazole; 2,5-bis(2-thiophenyl)thiazole; 2,5-dimercapto-1,3,4-thiadiazole [bismuththiol]; 2-mercaptothianaphthene; 7-(thiomethyl)thianaphthene; 1,8-dimercaptodibenzothiophene; 2-mercaptobenzothiazole; 2-mercapro-1,3,4-thiadiazole; 2-amino-5-mercapto-1,3,4-thiadiazole; 2,5-bis(alkylthio)-1,3,4-thiadiazole; and 7-(thiomethyl)benzothiazole.

S Valence Stabilizer #9b: Examples of 5-membered heterocyclic rings containing two sulfur atoms and having at least one additional sulfur atom binding site not contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercapto-1,3-dithiole; 2-(dimercaptomethyl)-1,3-dithiole; 4,5-dimercapto-1,3-dithiole; 4,5-bis(2-thiophenyl)-1,3-dithiole; 2-mercaptobenzodithiole; and 7-mercaptobenzodithiole.

S Valence Stabilizer #10a: Examples of 6-membered heterocyclic rings containing one sulfur atom and having at least one additional sulfur atom binding site not contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,6-dimercapto-2,5-dihydrothiopyran; 2,6-bis(thiomethyl)-2,5-dihydrothiopyran; 2,6-bis(2-thiophenyl)-2,5-dihydrothiopyran; 2,6-dimercaptothiopyran; 2,6-bis(thiomethyl)thiopyran; 2,6-bis(2-thiophenyl)thiopyran; 2,6-dimercaptothiazine; 2,6-bis(thiomethyl)thiazine; 2,6-bis(2-thiophenyl)thiazine; 2,6-dimercapto-1,3,5-thiadiazine; 2-mercapto-1-benzothiopyran; 8-mercapto-1-benzothiopyran; and 1,9-dimercaptodibenzothiopyran.

S Valence Stabilizer #10b: Examples of 6-membered heterocyclic rings containing two sulfur atoms and having at least one additional sulfur atom binding site not contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercapto-1,4-dithiin; 2,6-dimercapto-1,4-dithiin; 2,6-bis(2-thiophenyl)-1,4-dithiin; 2,3-dimercapto-1,4-benzodithiin; 5,8-dimercapto-1,4-benzodithiin; 1,8-dimercaptothianthrene; and 1,4,5,8-tetramercaptothianthrene.

S Valence Stabilizer #11a: Examples of 5-membered heterocyclic rings containing one sulfur atom and having at least one additional sulfur atom binding site contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydrothiophene; 2,2′,2′′-tri-2,5-dihydrothiophene; 2,2′-bithiophene; 2,2′,2′′-trithiophene; 2,2′-bithiazole; 5,5′-bithiazole; 2,2′-bioxathiole; 2,2′-bi-1,3,4-thiadiazole; 2,2′-bithianaphthene; 2,2′-bibenzothiazole; 1,1′-bis(dibenzothiophene); and polythiophenes.

S Valence Stabilizer #11b: Examples of 5-membered heterocyclic rings containing two sulfur atoms and having at least one additional sulfur atom binding site contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3-dithiole; 4,4′-bi-1,3-dithiole; 7,7′-bi-1,2-benzodithiole; 3,3′-bi-1,2-benzodithiole; and tetrathiofulvalene.

S Valence Stabilizer #12a: Examples of 6-membered heterocyclic rings containing one sulfur atom and having at least one additional sulfur atom binding site contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydrothiopyran; 2,2′,2′′-tri-2,5-dihydrothiopyran; 2,2′-bithiopyran; 2,2′,2′′-trithiopyran; 2,2′-bi-1,4-thiazine; 2,2′-bi-1,3,5-thiadiazine; 2,2′-bi-1-benzothiopyran; and 1,1′-bis(dibenzothiopyran)

S Valence Stabilizer #12b: Examples of 6-membered heterocyclic rings containing two sulfur atoms and having at least one additional sulfur atom binding site contained in a ring (S Monodentates, S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,4-dithiin; 2,2′-bi-1,3-dithiin; 5,5′-bi-1,4-benzodithiin; 2,2′-bi-1,3-benzodithiin; and 1,1′-bithianthrene.

S Valence Stabilizer #13a: Examples of two-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein both binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiacyclobutane ([4]aneS2); dithiacyclopentane ([5]aneS2); dithiacyclohexane ([6]aneS2); dithiacycloheptane ([7]aneS2); dithiacyclooctane ([8]aneS2); dithiacyclobutene ([4]eneS2); dithiacyclopentene ([5]eneS2); dithiacyclohexene ([6]eneS2); dithiacycloheptene ([7]eneS2); dithiacyclooctene ([8]eneS2); dithiacyclobutadiene ([4]dieneS2); dithiacyclopentadiene ([5]dieneS2); dithiacyclohexadiene ([6]dieneS2); dithiacycloheptadiene ([7]dieneS2); and dithiacyclooctadiene ([8]dieneS2).

S Valence Stabilizer #13b: Examples of three-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithiacyclohexane ([6]aneS3); trithiacycloheptane ([7]aneS3); trithiacyclooctane ([8]aneS3); trithiacyclononane ([9]aneS3); trithiacyclodecane ([10]aneS3); trithiacycloundecane ([11]aneS3); trithiacyclododecane ([12]aneS3); trithiacyclohexene ([6]eneS3); trithiacycloheptene ([7]eneS3); trithiacyclooctene ([8]eneS3); trithiacyclononene ([9]eneS3); trithiacyclodecene ([10]eneS3); trithiacycloundecene ([11]eneS3); trithiacyclododecene ([12]eneS3); trithiacyclohexatriene ([6]trieneS3); trithiacycloheptatriene ([7]trieneS3); trithiacyclooctatriene ([8]trieneS3); trithiacyclononatriene ([9]trieneS3); trithiacyclodecatriene ([10]trieneS3); trithiacycloundecatriene ([11]trieneS3); and trithiacyclododecatriene ([12]trieneS3).

S Valence Stabilizer #13c: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrathiacyclooctane ([8]aneS4); tetrathiacyclononane ([9]aneS4); tetrathiacyclodecane ([10]aneS4); tetrathiacycloundecane ([11]aneS4); tetrathiacyclododecane ([12]aneS4); tetrathiacyclotridecane ([13]aneS4); tetrathiacyclotetradecane ([14]aneS4); tetrathiacyclopentadecane ([15]aneS4); tetrathiacyclohexadecane ([16]aneS4); tetrathiacycloheptadecane ([17]aneS4); tetrathiacyclooctadecane ([18]aneS4); tetrathiacyclononadecane ([19]aneS4); tetrathiacycloeicosane ([20]aneS4); tetrathiacyclooctadiene ([8]dieneS4); tetrathiacyclononadiene ([9]dieneS4); tetrathiacyclodecadiene ([10]dieneS4); tetrathiacycloundecadiene ([11]dieneS4); tetrathiacyclododecadiene ([12]dieneS4); tetrathiacyclotridecadiene ([13]dieneS4); tetrathiacyclotetradecadiene ([14]dieneS4); tetrathiacyclopentadecadiene ([15]dieneS4); tetrathiacyclohexadecadiene ([16]dieneS4); tetrathiacycloheptadecadiene ([17]dieneS4); tetrathiacyclooctadecadiene ([18]dieneS4); tetrathiacyclononadecadiene ([19]dieneS4); tetrathiacycloeicosadiene ([20]dieneS4); tetrathiacyclooctatetradiene ([8]tetradieneS4); tetrathiacyclononatetradiene ([9]tetradieneS4); tetrathiacyclodecatetradiene ([10]tetradieneS4); tetrathiacycloundecatetradiene ([11]tetradieneS4); tetrathiacyclododecatetradiene ([12]tetradieneS4); tetrathiacyclotridecatetradiene ([13]tetradieneS4); tetrathiacyclotetradecatetradiene ([14]tetradieneS4); tetrathiacyclopentadecatetradiene ([15]tetradieneS4); tetrathiacyclohexadecatetradiene ([16]tetradieneS4); tetrathiacycloheptadecatetradiene ([17]tetradieneS4); tetrathiacyclooctadecatetradiene ([18]tetradieneS4); tetrathiacyclononadecatetradiene ([19]tetradieneS4); and tetrathiacycloeicosatetradiene ([20]tetradieneS4).

S Valence Stabilizer #13d: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates or S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentathiacyclodecane ([10]aneS5); pentathiacycloundecane ([11]aneS5); pentathiacyclododecane ([12]aneS5); pentathiacyclotridecane ([13]aneS5); pentathiacyclotetradecane ([14]aneS5); pentathiacyclopentadecane ([15]aneS5); pentathiacyclodecatriene ([10]trieneS5); pentathiacycloundecatriene ([11]trieneS5); pentathiacyclododecatriene ([12]trieneS5); pentathiacyclotridecatriene ([13]trieneS5); pentathiacyclotetradecatriene ([14]trieneS5); and pentathiacyclopentadecatriene ([15]trieneS5).

S Valence Stabilizer #13e: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathiacyclododecane ([12]aneS6); hexathiacyclotridecane ([13]aneS6); hexathiacyclotetradecane ([14]aneS6); hexathiacyclopentadecane ([15]aneS6); hexathiacyclohexadecane ([16]aneS6); hexathiacycloheptadecane ([17]aneS6); hexathiacyclooctadecane ([18]aneS6); hexathiacyclononadecane ([19]aneS6); hexathiacycloeicosane ([20]aneS6); hexathiacycloheneicosane ([21]aneS6); hexathiacyclodocosane ([22]aneS6); hexathiacyclotricosane ([23]aneS6); hexathiacyclotetracosane ([24]aneS6); hexathiacyclododecatriene ([12]trieneS6); hexathiacyclotridecatriene ([13]trieneS6); hexathiacyclotetradecatriene ([14]trieneS6); hexathiacyclopentadecatriene ([15]trieneS6); hexathiacyclohexadecatriene ([16]trieneS6); hexathiacycloheptadecatriene ([17]trieneS6); hexathiacyclooctadecatriene ([18]trieneS6); hexathiacyclononadecatriene ([19]trieneS6); hexathiacycloeicosatriene ([20]trieneS6); hexathiacycloheneicosatriene ([21]trieneS6); hexathiacyclodocosatriene ([22]trieneS6); hexathiacyclotricosatriene ([23]trieneS6); and hexathiacyclotetracosatriene ([24]trieneS6).

S Valence Stabilizer #13f: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: heptathiacyclotetradecane ([14]aneS7); heptathiacyclopentadecane ([15]aneS7); heptathiacyclohexadecane ([16]aneS7); heptathiacycloheptadecane ([17]aneS7); heptathiacyclooctadecane ([18]aneS7); heptathiacyclononadecane ([19]aneS7); heptathiacycloeicosane ([20]aneS7); heptathiacycloheneicosane ([21]aneS7); heptathiacyclotetradecatriene ([14]trieneS7); heptathiacyclopentadecatriene ([15]trieneS7); heptathiacyclohexadecatriene ([16]trieneS7); heptathiacycloheptadecatriene ([17]trieneS7); heptathiacyclooctadecatriene ([18]trieneS7); heptathiacyclononadecatriene ([19]trieneS7); heptathiacycloeicosatriene ([20]trieneS7); and heptathiacycloheneicosatriene ([21]trieneS7).

S Valence Stabilizer #13g: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octathiacyclohexadecane ([16]aneS8); octathiacycloheptadecane ([17]aneS8); octathiacyclooctadecane ([18]aneS8); octathiacyclononadecane ([19]aneS8); octathiacycloeicosane ([20]aneS8); octathiacycloheneicosane ([21]aneS8); octathiacyclodocosane ([22]aneS8); octathiacyclotricosane ([23]aneS8); octathiacyclotetracosane ([24]aneS8); octathiacyclohexadecatetradiene ([16]tetradieneS8); octathiacycloheptadecatetradiene ([17]tetradieneS8); octathiacyclooctadecatetradiene ([18]tetradieneS8); octathiacyclononadecatetradiene ([19]tetradieneS8); octathiacycloeicosatetradiene ([20]tetradieneS8); octathiacycloheneicosatetradiene ([21]tetradieneS8); octathiacyclodocosatetradiene ([22]tetradieneS8); octathiacyclotricosatetradiene ([23]tetradieneS8); and octathiacyclotetracosatetradiene ([24]tetradieneS8).

S Valence Stabilizer #13h: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: nonathiacyclooctadecane ([18]aneS9); nonathiacyclononadecane ([19]aneS9); nonathiacycloeicosane ([20]aneS9); nonathiacycloheneicosane ([21]aneS9); nonathiacyclodocosane ([22]aneS9); nonathiacyclotricosane ([23]aneS9); nonathiacyclotetracosane ([24]aneS9); nonathiacyclopentacosane ([25]aneS9); nonathiacyclohexacosane ([26]aneS9); nonathiacycloheptacosane ([27]aneS9); nonathiacyclooctadecatetradiene ([18]tetradieneS9); nonathiacyclononadecatetradiene ([19]tetradieneS9); nonathiacycloeicosatetradiene ([20]tetradieneS9); nonathiacycloheneicosatetradiene ([21]tetradieneS9); nonathiacyclodocosatetradiene ([22]tetradieneS9); nonathiacyclotricosatetradiene ([23]tetradieneS9); nonathiacyclotetracosatetradiene ([24]tetradieneS9); nonathiacyclopentacosatetradiene ([25]tetradieneS9); nonathiacyclohexacosatetradiene ([26]tetradieneS9); and nonathiacycloheptacosatetradiene ([27]tetradieneS9).

S Valence Stabilizer #13i: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol or thioether groups) and are not contained in component heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: decathiacycloeicosane ([20]aneS10); decathiacycloheneicosane ([21]aneS10); decathiacyclodocosane ([22]aneS10); decathiacyclotricosane ([23]aneS10); decathiacyclotetracosane ([24]aneS10); decathiacyclopentacosane ([25]aneS10); decathiacyclohexacosane ([26]aneS10); decathiacycloheptacosane ([27]aneS10); decathiacyclooctacosane ([28]aneS10); decathiacyclononacosane ([29]aneS10); decathiacyclotriacontane ([30]aneS10); decathiacycloeicosapentadiene ([20]pentadieneS10); decathiacycloheneicosapentadiene ([21]pentadieneS10); decathiacyclodocosapentadiene ([22]pentadieneS10); decathiacyclotricosapentadiene ([23]pentadieneS10); decathiacyclotetracosapentadiene ([24]pentadieneS10); decathiacyclopentacosapentadiene ([25]pentadieneS10); decathiacyclohexacosapentadiene ([26]pentadieneS10); decathiacycloheptacosapentadiene ([27]pentadieneS10); decathiacyclooctacosapentadiene ([28]pentadieneS10); decathiacyclononacosapentadiene ([29]pentadieneS10); and decathiacyclotriacontapentadiene ([30]pentadieneS10).

S Valence Stabilizer #14a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrathiophenes; tetrathiazoles; tetrathiaphospholes; tetraoxathioles; tetrathiadiazoles; tetrathiatriazoles; and tetradithioles.

S Valence Stabilizer #14b: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates or S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentathiophenes; pentathiazoles; pentathiaphospholes; pentaoxathioles; pentathiadiazoles; pentathiatriazoles; and pentadithioles.

S Valence Stabilizer #14c: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathiophenes; hexathiazoles; hexathiaphospholes; hexaoxathioles; hexathiadiazoles; hexathiatriazoles; and hexadithioles.

S Valence Stabilizer #14d: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: heptathiophenes; heptathiazoles; heptathiaphospholes; heptaoxathioles; heptathiadiazoles; heptathiatriazoles; and heptadithioles.

S Valence Stabilizer #14e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octathiophenes; octathiazoles; octathiaphospholes; octaoxathioles; octathiadiazoles; octathiatriazoles; and octadithioles.

S Valence Stabilizer #14f: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: nonathiophenes; nonathiazoles; nonathiaphospholes; nonaoxathioles; nonathiadiazoles; nonathiatriazoles; and nonadithioles.

S Valence Stabilizer #14g: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of sulfur and are contained in component 5-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: decathiophenes; decathiazoles; decathiaphospholes; decaoxathioles; decathiadiazoles; decathiatriazoles; and decadithioles.

S Valence Stabilizer #15a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiatetrathiophenes; tetrathiatetrathiophenes; dithiatetradithioles; and tetrathiatetradithioles.

S Valence Stabilizer #15b: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates or S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiapentathiophenes; tetrathiapentathiophenes; dithiapentadithioles; and tetrathiapentadithioles.

S Valence Stabilizer #15c: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiahexaathiophenes; trithiahexathiophenes; dithiahexadithioles; and trithiahexadithioles.

S Valence Stabilizer #15d: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “wide band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiaheptathiophenes; tetrathiaheptathiophenes; dithiaheptadithioles; and tetrathiaheptadithioles.

S Valence Stabilizer #15e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiaoctathiophenes; tetrathiaoctathiophenes; dithiaoctadithioles; and tetrathiaoctadithioles.

S Valence Stabilizer #15f: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithianonathiophenes; hexathianonathiophenes; trithianonadithioles; and hexathianonadithioles.

S Valence Stabilizer #15g: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of sulfur and are contained in a combination of 5-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiadecathiophenes; pentathiadecathiophenes; dithiadecadithioles; and pentathiadecadithioles.

S Valence Stabilizer #16a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrathiopyrans; tetrathiazines; tetrathiaphosphorins; tetrathiadiphosphorins; tetraoxathiins; and tetradithiins.

S Valence Stabilizer #16b: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates or S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pentathiopyrans; pentathiazines; pentathiaphosphorins; pentathiadiphosphorins; pentaoxathiins; and pentadithiins.

S Valence Stabilizer #16c: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathiopyrans; hexathiazines; hexathiaphosphorins; hexathiadiphosphorins; hexaoxathiins; and hexadithiins.

S Valence Stabilizer #16d: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: heptathiopyrans; heptathiazines; heptathiaphosphorins; heptathiadiphosphorins; heptaoxathiins; and heptadithiins.

S Valence Stabilizer #16e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octathiopyrans; octathiazines; octathiaphosphorins; octathiadiphosphorins; octaoxathiins; and octadithiins.

S Valence Stabilizer #16f: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: nonathiopyrans; nonathiazines; nonathiaphosphorins; nonathiadiphosphorins; nonaoxathiins; and nonadithiins.

S Valence Stabilizer #16g: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of sulfur and are contained in component 6-membered heterocyclic rings (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: decathiopyrans; decathiazines; decathiaphosphorins; decathiadiphosphorins; decaoxathiins; and decadithiins.

S Valence Stabilizer #17a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiatetrathiopyrans; tetrathiatetrathiopyrans; dithiatetrathiazines; tetrathiatetrathiazines; dithiatetrathiaphosphorins; tetrathiatetrathiaphosphorins; dithiatetraoxathiins; tetrathiatetraoxathiins; dithiatetradithiins; and tetrathiatetradithiins.

S Valence Stabilizer #17b: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all five binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates or S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiapentathiopyrans; tetrathiapentathiopyrans; dithiapentathiazines; tetrathiapentathiazines; dithiapentathiaphosphorins; tetrathiapentathiaphosphorins; dithiapentaoxathiins; tetrathiapentaoxathiins; dithiapentadithiins; and tetrathiapentadithiins.

S Valence Stabilizer #17c: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiahexathiopyrans; trithiahexathiopyrans; dithiahexathiazines; trithiahexathiazines; dithiahexathiaphosphorins; trithiahexathiaphosphorins; dithiahexaoxathiins; trithiahexaoxathiins; dithiahexadithiins; and trithiahexadithiins.

S Valence Stabilizer #17d: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all seven binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiaheptathiopyrans; tetrathiaheptathiopyrans; dithiaheptathiazines; tetrathiaheptathiazines; dithiaheptathiaphosphorins; tetrathiaheptathiaphosphorins; dithiaheptaoxathiins; tetrathiaheptaoxathiins; dithiaheptadithiins; and tetrathiaheptadithiins.

S Valence Stabilizer #17e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiaoctathiopyrans; tetrathiaoctathiopyrans; dithiaoctathiazines; tetrathiaoctathiazines; dithiaoctathiaphosphorins; tetrathiaoctathiaphosphorins; dithiaoctaoxathiins; tetrathiaoctaoxathiins; dithiaoctadithiins; and tetrathiaoctadithiins.

S Valence Stabilizer #17f: Examples of nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all nine binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithianonathiopyrans; hexathianonathiopyrans; trithianonathiazines; hexathianonathiazines; trithianonathiaphosphorins; hexathianonathiaphosphorins; trithianonaoxathiins; hexathianonaoxathiins; trithianonadithiins; and hexathianonadithiins.

S Valence Stabilizer #17g: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all ten binding sites are composed of sulfur and are contained in a combination of 6-membered heterocyclic rings and thiol, thioether, or thioketo groups (S—S Tridentates, S—S Tetradentates, or S—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiadecathiopyrans; pentathiadecathiopyrans; dithiadecathiazines; pentathiadecathiazines; dithiadecathiaphosphorins; pentathiadecathiaphosphorins; dithiadecaoxathiins; pentathiadecaoxathiins; dithiadecadithiins; and pentathiadecadithiins.

S Valence Stabilizer #18: Examples of dithiobiurets (dithioimidodicarbonic diamides), dithioisobiurets, dithiobiureas, trithiotriurets, trithiotriureas, bis(dithiobiurets), bis(dithioisobiurets), bis(dithiobiureas), poly(dithiobiurets), poly(dithioisobiurets), and poly(dithiobiureas) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiobiuret, dithioisobiuret, dithiobiurea, trithiotriuret, trithiotriurea, nitrodithiobiuret, dinitrodithiobiuret, aminodithiobiuret, diaminodithiobiuret, oxydithiobiuret, dioxydithiobiuret, cyanodithiobiuret, methyldithiobiuret, ethyldithiobiuret, isopropyldithiobiuret, phenyldithiobiuret, benzyldithiobiuret, cyclohexyldithiobiuret, norbornyldithiobiuret, adamantyldithiobiuret, dimethyldithiobiuret, diethyldithiobiuret, diisopropyldithiobiuret, diphenyldithiobiuret, dibenzyldithiobiuret, dicyclohexyldithiobiuret, dinorbornyldithiobiuret, and diadamantyldithiobiuret.

S Valence Stabilizer #19: Examples of thioacylthioureas, thioaroylthioureas, bis(thioacylthioureas), bis(thioaroylthioureas), poly(thioacylthioureas), and poly(thioaroylthioureas) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioformylthiourea, thioacetylthiourea, thiobenzoylthiourea, thiocyclohexoylthiourea, pentafluorothiobenzoylthiourea, N-methylthioacetylthiourea, N-phenylthiobenzoylthiourea, and N-cyclohexylthiocyclohexoylthiourea.

S Valence Stabilizer #20: Examples of dithioacyl disulfides, bis(dithioacyl disulfides), and poly(dithioacyl disulfides), (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioacetyl disulfide; dithiopropanoyl disulfide; dithiobenzoyl disulfide; and dithiopentafluorobenzoyl disulfide.

S Valence Stabilizer #21: Examples of tetrathioperoxydicarbonic diamides, bis(tetrathioperoxydicarbonic diamides), and poly(tetrathioperoxydicarbonic diamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrathioperoxydicarbonic diamide; N-phenyltetrathioperoxydicarbonic diamide; N-benzyltetrathioperoxydicarbonic diamide; N-cyclohexyltetrathioperoxydicarbonic diamide; N-norbornyltetrathioperoxydicarbonic diamide; N,N′-diphenyltetrathioperoxydicarbonic diamide; N,N′-dibenzyltetrathioperoxydicarbonic diamide; N,N′-dicyclohexyltetrathioperoxydicarbonic diamide; and N,N′-dinorbornyltetrathioperoxydicarbonic diamide.

S Valence Stabilizer #22: Examples of hexathio-, pentathio-, and tetrathioperoxydicarbonic acids, bis(hexathio-, pentathio-, and tetrathioperoxydicarbonic acids), poly(hexathio-, pentathio-, and tetrathioperoxydicarbonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexathioperoxydicarbonic acid, pentathioperoxydicarbonic acid, tetrathioperoxydicarbonic acid, S-phenylhexathioperoxydicarbonic acid; S-benzylhexathioperoxydicarbonic acid; S-cyclohexylhexathioperoxydicarbonic acid; S-norbornylhexathioperoxydicarbonic acid; S,S′-diphenylhexathioperoxydicarbonic acid; S,S′-dibenzylhexathioperoxydicarbonic acid; S,S′-dicyclohexylhexathioperoxydicarbonic acid; and S,S′-dinorbornylhexathioperoxydicarbonic acid.

S Valence Stabilizer #23: Examples of dithioperoxydiphosphoramides, bis(dithioperoxydiphosphoramides), and poly(dithioperoxydiphosphoramides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioperoxydiphosphoramide, N-methyldithioperoxydiphosphoramide, N-isopropyldithioperoxydiphosphoramide, N-tert-butyldithioperoxydiphosphoramide, N-phenyldithioperoxydiphosphoramide, N-pentafluorophenyldithioperoxydiphosphoramide, N-benzyldithioperoxydiphosphoramide, N-cyclohexyldithioperoxydiphosphoramide, N-norbornyldithioperoxydiphosphoramide, N,N′′′-dimethyldithioperoxydiphosphoramide, N,N′′′-diisopropyldithioperoxydiphosphoramide, N,N′′′-di-tert-butyldithioperoxydiphosphoramide, N,N′′′-diphenyldithioperoxydiphosphoramide, N,N′′′-di-pentafluorophenyldithioperoxydiphosphoramide, N,N′′′-dibenzyldithioperoxydiphosphoramide, N,N′′′-dicyclohexyldithioperoxydiphosphoramide, and N,N′′′-dinorbornyldithioperoxydiphosphoramide.

S Valence Stabilizer #24: Examples of dithioperoxydiphosphoric acids, bis(dithioperoxydiphosphoric acids), poly(dithioperoxydiphosphoric acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioperoxydiphosphoric acid, methyldithioperoxydiphosphoric acid, isopropyldithioperoxydiphosphoric acid, tert-butyldithioperoxydiphosphoric acid, phenyldithioperoxydiphosphoric acid, pentafluorophenyldithioperoxydiphosphoric acid, benzyldithioperoxydiphosphoric acid, cyclohexyldithioperoxydiphosphoric acid, norbornyldithioperoxydiphosphoric acid, dimethyldithioperoxydiphosphoric acid, diisopropyldithioperoxydiphosphoric acid, di-tert-butyldithioperoxydiphosphoric acid, diphenyldithioperoxydiphosphoric acid, di-pentafluorophenyldithioperoxydiphosphoric acid, dibenzyldithioperoxydiphosphoric acid, dicyclohexyldithioperoxydiphosphoric acid, and dinorbornyldithioperoxydiphosphoric acid.

S Valence Stabilizer #25: Examples of dithioimidodiphosphonic acids, dithiohydrazidodiphosphonic acids, bis(dithioimidodiphosphonic acids), bis(dithiohydrazidodiphosphonic acids), poly(dithioimidodiphosphonic acids), poly(dithiohydrazidodiphosphonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioimidodiphosphonic acid, methyldithioimidodiphosphonic acid, isopropyldithioimidodiphosphonic acid, tert-butyldithioimidodiphosphonic acid, phenyldithioimidodiphosphonic acid, pentafluorophenyldithioimidodiphosphonic acid, benzyldithioimidodiphosphonic acid, cyclohexyldithioimidodiphosphonic acid, norbornyldithioimidodiphosphonic acid, dimethyldithioimidodiphosphonic acid, diisopropyldiothioimidodiphosphonic acid, di-tert-butyldithioimidodiphosphonic acid, diphenyldithioimidodiphosphonic acid, di-pentafluorophenyldithioimidodiphosphonic acid, dibenzyldithioimidodiphosphonic acid, dicyclohexyldithioimidodiphosphonic acid, and dinorbornyldithioimidodiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #26: Examples of dithioimidodiphosphonamides, dithiohydrazidodiphosphonamides, bis(dithioimidodiphosphonamides), bis(dithiohydrazidodiphosphonamides), poly(dithioimidodiphosphonamides), and poly(dithiohydrazidodiphosphonamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioimidodiphosphonamide, N-methyldithioimidodiphosphonamide, N-isopropyldithioimidodiphosphonamide, N-tert-butyldithioimidodiphosphonamide, N-phenyldithioimidodiphosphonamide, N-pentafluorophenyldithioimidodiphosphonamide, N-benzyldithioimidodiphosphonamide, N-cyclohexyldithioimidodiphosphonamide, N-norbornyldithioimidodiphosphonamide, N,N′′′-dimethyldithioimidodiphosphonamide, N,N′′′-diisopropyldithioimidodiphosphonamide, N,N′′′-di-tert-butyldithioimidodiphosphonamide, N,N′′′-diphenyldithioimidodiphosphonamide, N,N′′′-di-pentafluorophenyldithioimidodiphosphonamide, N,N′′′-dibenzyldithioimidodiphosphonamide, N,N′′′-dicyclohexyldithioimidodiphosphonamide, and N,N′′′-dinorbornyldithioimidodiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #27: Examples of dithiodiphosphonamides, bis(dithiodiphosphonamides), and poly(dithiodiphosphonamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphonamide, N-methyldithiodiphosphonamide, N-isopropyldithiodiphosphonamide, N-tert-butyldithiodiphosphonamide, N-phenyldithiodiphosphonamide, N-pentafluorophenyldithiodiphosphonamide, N-benzyldithiodiphosphonamide, N-cyclohexyldithiodiphosphonamide, N-norbornyldithiodiphosphonamide, N,N′′′-dimethyldithiodiphosphonamide, N,N′′′-diisopropyldithiodiphosphonamide, N,N′′′-di-tert-butyldithiodiphosphonamide, N,N′′′-diphenyldithiodiphosphonamide, N,N′′′-di-pentafluorophenyldithiodiphosphonamide, N,N′′′-dibenzyldithiodiphosphonamide, N,N′′′-dicyclohexyldithiodiphosphonamide, and N,N′′′-dinorbornyldithiodiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #28: Examples of dithiodiphosphonic acids, bis(dithiodiphosphonic acids), poly(dithiodiphosphonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphonic acid, methyldithiodiphosphonic acid, isopropyldithiodiphosphonic acid, tert-butyldithiodiphosphonic acid, phenyldithiodiphosphonic acid, pentafluorophenyldithiodiphosphonic acid, benzyldithiodiphosphonic acid, cyclohexyldithiodiphosphonic acid, norbornyldithiodiphosphonic acid, dimethyldithiodiphosphonic acid, diisopropyldiothiodiphosphonic acid, di-tert-butyldithiodiphosphonic acid, diphenyldithiodiphosphonic acid, di-pentafluorophenyldithiodiphosphonic acid, dibenzyldithiodiphosphonic acid, dicyclohexyldithiodiphosphonic acid, and dinorbornyldithiodiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #29: Examples of dithioperoxydiphosphonamides, bis(dithioperoxydiphosphonamides), and poly(dithioperoxydiphosphonamides) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioperoxydiphosphonamide, N-methyldithioperoxydiphosphonamide, N-isopropyldithioperoxydiphosphonamide, N-tert-butyldithioperoxydiphosphonamide, N-phenyldithioperoxydiphosphonamide, N-pentafluorophenyldithioperoxydiphosphonamide, N-benzyldithioperoxydiphosphonamide, N-cyclohexyldithioperoxydiphosphonamide, N-norbornyldithioperoxydiphosphonamide, N,N′′′-dimethyldithioperoxydiphosphonamide, N,N′′′-diisopropyldithioperoxydiphosphonamide, N,N′′′-di-tert-butyldithioperoxydiphosphonamide, N,N′′′-diphenyldithioperoxydiphosphonamide, N,N′′′-di-pentafluorophenyldithioperoxydiphosphonamide, N,N′′′-dibenzyldithioperoxydiphosphonamide, N,N′′′-dicyclohexyldithioperoxydiphosphonamide, and N,N′′′-dinorbornyldithioperoxydiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #30: Examples of dithioperoxydiphosphonic acids, bis(dithioperoxydiphosphonic acids), poly(dithioperoxydiphosphonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioperoxydiphosphonic acid, methyldithioperoxydiphosphonic acid, isopropyldithioperoxydiphosphonic acid, tert-butyldithioperoxydiphosphonic acid, phenyldithioperoxydiphosphonic acid, pentafluorophenyldithioperoxydiphosphonic acid, benzyldithioperoxydiphosphonic acid, cyclohexyldithioperoxydiphosphonic acid, norbornyldithioperoxydiphosphonic acid, dimethyldithioperoxydiphosphonic acid, diisopropyldithioperoxydiphosphonic acid, di-tert-butyldithioperoxydiphosphonic acid, diphenyldithioperoxydiphosphonic acid, di-pentafluorophenyldithioperoxydiphosphonic acid, dibenzyldithioperoxydiphosphonic acid, dicyclohexyldithioperoxydiphosphonic acid, and dinorbornyldithioperoxydiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #31: Examples of dithiophosphonic acids (phosphonodithioic acids), bis(dithiophosphonic acids), poly(dithiophosphonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiophosphonic acid, O-phenyldithiophosphonic acid, O-benzyldithiophosphonic acid, O-cyclohexyldithiophosphonic acid, O-norbornyldithiophosphonic acid, O,P-diphenyldithiophosphonic acid, O,P-dibenzyldithiophosphonic acid, O,P-dicyclohexyldithiophosphonic acid, and O,P-dinorbornyldithiophosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #32: Examples of trithiophosphonic acids (phosphonotrithioic acids), bis(trithiophosphonic acids), poly(trithiophosphonic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithiophosphonic acid, S-phenyltrithiophosphonic acid, S-benzyltrithiophosphonic acid, S-cyclohexyltrithiophosphonic acid, S-norbornyltrithiophosphonic acid, S,P-diphenyltrithiophosphonic acid, S,P-dibenzyltrithiophosphonic acid, S,P-dicyclohexyltrithiophosphonic acid, and S,P-dinorbornyltrithiophosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #33: Examples of phosphono(dithioperoxo)thioic acids, bis[phosphono(dithioperoxo)thioic acids], poly[phosphono(dithioperoxo)thioic acids], and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphono(dithioperoxo)thioic acid, O-phenylphosphono(dithioperoxo)thioic acid, O-benzylphosphono(dithioperoxo)thioic acid, O-cyclohexylphosphono(dithioperoxo)thioic acid, O-norbornylphosphono(dithioperoxo)thioic acid, O,P-diphenylphosphono(dithioperoxo)thioic acid, O,P-dibenzylphosphono(dithioperoxo)thioic acid, O,P-dicyclohexylphosphono(dithioperoxo)thioic acid, and O,P-dinorbornylphosphono(dithioperoxo)thioic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #34: Examples of phosphono(dithioperoxo)dithioic acids, bis[phosphono(dithioperoxo)dithioic acids], poly[phosphono(dithioperoxo)dithioic acids], and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphono(dithioperoxo)dithioic acid, S-phenylphosphono(dithioperoxo)dithioic acid, S-benzylphosphono(dithioperoxo)dithioic acid, S-cyclohexylphosphono(dithioperoxo)dithioic acid, S-norbornylphosphono(dithioperoxo)dithioic acid, S,P-diphenylphosphono(dithioperoxo)dithioic acid, S,P-dibenzylphosphono(dithioperoxo)dithioic acid, S,P-dicyclohexylphosphono(dithioperoxo)dithioic acid, and S,P-dinorbornylphosphono(dithioperoxo)dithioic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S Valence Stabilizer #35: Examples of S-(alkylthio)thiocarboxylic acids, S-(arylthio)thiocarboxylic acids, and S,S-thiobisthiocarboxylic Acids (S—S Bidentates and S—S Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: (methylthio)thioacetic acid; (methylthio)thiobenzoic acid; (methylthio)thionicotinic acid; (methylthio)thionapthoic acid; (phenylthio)thioacetic acid; (phenylthio)thiobenzoic acid; (phenylthio)thionaphthoic acid; (norbornylthio)thioacetic acid; (norbornylthio)thiobenzoic acid; (norbornylthio)thionapthoic acid; thiobisthioacetic acid; thiobisthiobenzoic acid; and thiobisthionapthoic acid.

S Valence Stabilizer #36: Examples of S-(alkyldisulfido)thiocarboxylic acids, S-(aryldisulfido)thiocarboxylic acids, and S,S′-disulfidobisthiocarboxylic acids (S—S Bidentates and S—S Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: (methyldisulfido)thioacetic acid; (methyldisulfido)thiobenzoic acid; (methyldisulfido)thionicotinic acid; (methyldisulfido)thionapthoic acid; (phenyldisulfido)thioacetic acid; (phenyldisulfido)thiobenzoic acid; (phenyldisulfido)thionaphthoic acid; (norbornyldisulfido)thioacetic acid; (norbornyldisulfido)thiobenzoic acid; (norbornyldisulfido)thionapthoic acid; S,S′-disulfidobisthioacetic acid; S,S′-disulfidobisthiobenzoic acid; and S,S′-disulfidobisthionapthoic acid.

S Valence Stabilizer #37: Examples of 1,2-dithiolates, bis(1,2-dithiolates), and poly(1,2-dithiolates) (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,3-butanedithiol; 1,2-diphenyl-1,2-ethanedithiol; 1,2-di(pentafluorophenyl)-1,2-ethanedithio; 1,2-dicyclohexyl-1,2-ethanedithiol; 1,2-dinorbornyl-1,2-ethanedithiol; 2,3-dimercaptopropanol; 2,3-dimercaptosuccinic acid; poly[bis(arylthio)acetylene]s; and poly[bis(alkylylthio)acetylene]s.

S Valence Stabilizer #38: Examples of rhodanines and bis(rhodanines) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-methylrhodanine; 3-ethylrhodanine; 3-isopropylrhodanine; 3-phenylrhodanine; 3-benzylrhodanine; 3-cyclohexylrhodanine; 3-norbornylrhodanine; 5-methylrhodanine; 5-ethylrhodanine; 5-isopropylrhodanine; 5-phenylrhodanine; 5-benzylrhodanine; 5-cyclohexylrhodanine; 5-norbornylrhodanine; 3,3′-ethylenebisrhodanine; 3,3′-propylenerhodanine; 3,3′-butylenerhodanine; 5,5′-ethylenebisrhodanine; 5,5′-propylenerhodanine; and 5,5′-butylenerhodanine. [Note: rhodanines and bis(rhodanines) tend to stabilize lower oxidation states in metal ions.]

S Valence Stabilizer #39: Examples of dithiocarbimates, bis(dithiocarbimates), and poly(dithiocarbimates) (S—S Bidentates, S—S Tridentates, and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyldithiocarbimate; trifluoromethyldithiocarbimate; ethyldithiocarbimate; propyldithiocarbimate; isopropyldithiocarbimate; butyldithiocarbimate; tertbutyldithiocarbimate; cyanodithiocarbimate (CDC); cyanamidodithiocarbimate; azidodithiocarbimate; phenyldithiocarbimate; pentafluorophenyldithiocarbimate; benzyldithiocarbimate; naphthyldithiocarbimate; cyclohexyldithiocarbimate; norbornyldithiocarbimate; and adamantyldithiocarbimate. [Note: Carbimates tend to stabilize lower oxidation states in metal ions.]

S Valence Stabilizer #40: Examples of thioxanthates, bis(thioxanthates), and poly(thioxanthates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl thioxanthate (MeSxan); ethyl thioxanthate (EtSxan); isopropyl thioxanthate (iPrSxan); trifluoromethyl thioxanthate (CF3Sxan); cyanothioxanthate; cyanamidothioxanthate; phenyl thioxanthate (PhSxan); benzyl thioxanthate (BzSxan); pentafluorophenyl thioxanthate; cyclohexyl thioxanthate (cHxSxan); and norbornyl thioxanthate. [Note: Thioxanthates tend to stabilize lower oxidation states in metal ions.]

S Valence Stabilizer #41: Examples of xanthates, bis(xanthates), and poly(xanthates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl xanthate (Mexan); ethyl xanthate (Etxan); isopropyl xanthate (iPrxan); trifluoromethyl xanthate (CF3xan); cyanoxanthate; cyanamidoxanthate; phenyl xanthate (Phxan); benzyl xanthate (Bzxan); pentafluorophenyl xanthate; cyclohexyl xanthate (cHxxan); and norbornyl xanthate. [Note: Xanthates tend to stabilize lower oxidation states in metal ions.]

S Valence Stabilizer #42: Examples of phosphinodithioformates (S—S Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethylphosphinodithioformate; triethylphosphinodithioformate; triphenylphosphinodithioformate; tricyclohexylphosphinodithioformate; dimethylphosphinodithioformate; diethylphosphinodithioformate; diphenylphosphinodithioformate; and dicyclohexylphosphinodithioformate.

S Valence Stabilizer #43: Examples of alkyl- and aryl-dithioborates, trithioborates, perthioborates, bis (dithioborates), bis(trithioborates), and bis(perthioborates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S,O-diethyl dithioborate; S,O-diisopropyl dithioborate; S,O-diphenyl dithioborate; S,O-dibenzyl dithioborate; S,O-dicyclohexyl dithioborate; S,O-dinorbornyl dithioborate; diethyl trithioborate; diisopropyl trithioborate; diphenyl trithioborate; dibenzyl trithioborate; dicyclohexyl trithioborate; and dinorbornyl trithioborate.

S Valence Stabilizer #44: Examples of alkyl- and aryl-dithioboronates and bis(dithioboronates) (S—S Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diethyl dithioboronate; diisopropyl dithioboronate; diphenyl dithioboronate; dibenzyl dithioboronate; dicyclohexyl dithioboronate; and dinorbornyl dithioboronate. [Note: boronates tend to stabilize lower oxidation states in metal ions.]

S Valence Stabilizer #45: Examples of trithioarsonic acids (arsonotrithioic acids), dithioarsonic acids (arsonodithioic acids), tetrathioarsonic acids (arsonotetrathioic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithioarsonic acid, O-phenyltrithioarsonic acid, O-benzyltrithioarsonic acid, O-cyclohexyltrithioarsonic acid, O-norbornyltrithioarsonic acid, O,S-diphenyltrithioarsonic acid, O,S-dibenzyltrithioarsonic acid, O,S-dicyclohexyltrithioarsonic acid, O,S-dinorbornyltrithioarsonic acid; dithioarsonic acid, O-phenyldithioarsonic acid, O-benzyldithioarsonic acid, O-cyclohexyldithioarsonic acid, O-norbornyldithioarsonic acid, O,O-diphenyldithioarsonic acid, O,O-dibenzyldithioarsonic acid, O,O-dicyclohexyldithioarsonic acid, and O,O-dinorbornyldithioarsonic acid.

S Valence Stabilizer #46: Examples of trithioantimonic acids (stibonotrithioic acids), dithioantimonic acids (stibonodithioic acids), tetrathioantimonic acids (stibonotetrathioic acids), and derivatives thereof (S—S Bidentates, S—S Tridentates, S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethyltrithioantimonate; triethyltrithioantimonate; and triphenyltrithioantimonate.

S Valence Stabilizer #47: Examples of phosphine P-sulfides and amino-substituted phosphine sulfides (S Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethylphosphine sulfide (TMPS); triethylphosphine sulfide (TEPS); triphenylphosphine sulfide (TPhPS); tribenzylphosphine sulfide (TBzPS); tricyclohexylphosphine sulfide (TcHxPS); and trinorbornylphosphine sulfide for phosphine P-sulfides; and tris(dimethylamino)phosphine sulfide; trimorpholinophosphine sulfide; tripiperidinophosphine sulfide; tripyrrolidinophosphine sulfide; and tri(cyclohexylamino)phosphine sulfide for amino-substituted phosphine sulfides.

S Valence Stabilizer #48: Examples of arsine As-sulfides and amino-substituted arsine sulfides (S Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethylarsine sulfide; triethylarsine sulfide; triphenylarsine sulfide; tribenzylarsine sulfide; tricyclohexylarsine sulfide; and trinorbornylarsine sulfide for arsine As-sulfides; and tris(dimethylamino)arsine sulfide; trimorpholinoarsine sulfide; tripiperidinoarsine sulfide; tripyrrolidinoarsine sulfide; and tri(cyclohexylamino)arsine sulfide for amino-substituted arsine sulfides.

S Valence Stabilizer #49: Examples of thiolates that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiophenol; naphthalenethiol; 1-dodecanethion; hexadecyl mercaptan; benzenethiol (bt); polybenzenethiols; and polythioarylenes.

S Valence Stabilizer #50: Examples of sulfide that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: sulfides (—S2−); disulfides (—S22−); and polysulfides (—Sx2−).

P Valence Stabilizer #1: Examples of monophosphines (P monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphine, phenylphosphine, diphenylphosphine, triphenylphosphine, tricyclohexylphosphine, phenyldimethylphosphine, phenyldiethylphosphine, methyldiphenylphosphine, ethyldiphenylphosphine, phosphirane, phosphetane, phospholane, phosphorinane, benzophospholane, benzophosphorinane, dibenzophospholane, dibenzophosphorinane, naphthophospholane, naphthophosphorinane, phosphinonorbornane, and phosphinoadamantane.

P Valence Stabilizer #2: Examples of diphosphines (P monodentates or P—P bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphospholane, benzodiphospholane, naphthodiphospholane, diphosphorinane, benzodiphosphorinane, dibenzodiphosphorinane, naphthodiphosphorinane, bis(diphenylphosphino)methane, bis(diphenylphosphino)ethane, bis(diphenylphosphino)propane, bis(diphenylphosphino)butane, bis(diphenylphosphino)pentane, 1,2-bis(diphenylphosphino)ethylene, and o-phenylenebis(diphenylphosphine). (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

P Valence Stabilizer #3: Examples of triphosphines (P monodentates, P—P bidentates, or P—P tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triphosphorinane, P,P′-tetraphenyl-2-methyl-2-(P-diphenyl)phosphinomethyl-1,3-propanediphosphine; P,P-[2-(P-diphenyl)phosphinoethyl]diethyl-P-phenylphosphine; P,P-[2-(P-diphenyl)phosphino]diphenyl-P-phenylphosphine; and hexahydro-2,4,6-trimethyl-1,3,5-triphosphazine. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

P Valence Stabilizer #4: Examples of tetraphosphines (P monodentates, P—P bidentates, P—P tridentates, and P—P tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P′-tetraphenyl-2,2-[(P-diphenyl)phosphinomethyl]-1,3-propanediphosphine; tri[o-(P-diphenyl)phosphinophenyl]phosphine; and 1,1,4,7,10,10-hexaphenyl-1,4,7,10-tetraphosphadecane. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

P Valence Stabilizer #5: Examples of pentaphosphines (P monodentates, P—P bidentates, P—P tridentates, and P—P tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-[2-(P-diphenyl)phosphinoethyl]-1,1,7,10,10-pentaphenyl-1,4,7,10-tetraphosphadecane. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

P Valence Stabilizer #6: Examples of hexaphosphines (P—P bidentates, P—P tridentates, P—P tetradentates, and P—P hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,1,10,10-tetraphenyl-4,7-[2-(P,P-diphenyl)phosphinoethyl]-1,4,7,10-tetraphosphadecane. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

P Valence Stabilizer #7a: Examples of 5-membered heterocyclic rings containing one phosphorus atom (P monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1-phospholene, 2-phospholene, 3-phospholene, phosphole, oxaphosphole, thiaphosphole, benzophospholene, benzophosphole, benzoxaphosphole, benzothiaphosphole, dibenzophospholene, dibenzophosphole, naphthophospholene, naphthophosphole, naphthoxaphosphole, naphthothiaphosphole.

P Valence Stabilizer #7b: Examples of 5-membered heterocyclic rings containing two phosphorus atoms (P monodentates or P—P bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphospholene, diphosphole, oxadiphospholene, thiadiphospholene, benzodiphospholene, benzodiphosphole, naphthodiphospholene, and naphthodiphosphole.

P Valence Stabilizer #7c: Examples of 5-membered heterocyclic rings containing three phosphorus atoms (P monodentates or P—P bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triphosphole.

P Valence Stabilizer #8a: Examples of 6-membered heterocyclic rings containing one phosphorus atom (P monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphorin, oxaphosphorin, thiaphosphorin, benzophosphorin, benzoxaphosphorin, benzothiaphosphorin, acridophosphine, phosphanthridine, dibenzoxaphosphorin, dibenzothiaphosphorin, naphthophosphorin, naphthoxaphosphorin, and naphthothiaphosphorin.

P Valence Stabilizer #8b: Examples of 6-membered heterocyclic rings containing two phosphorus atoms (P monodentates or P—P bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: o-diphosphorin, m-diphosphorin, p-diphosphorin, oxadiphosphorin, thiadiphosphorin, benzodiphosphorin, benzoxadiphosphorin, benzothiadiphosphorin, dibenzodiphosphorin, dibenzoxadiphosphorin, dibenzothiadiphosphorin, naphthodiphosphorin, naphthoxadiphosphorin, and naphthothiadiphosphorin.

P Valence Stabilizer #8c: Examples of 6-membered heterocyclic rings containing three phosphorus atoms (P monodentates or P—P bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3,5-triphosphorin, 1,2,3-triphosphorin, benzo-1,2,3-triphosphorin, and naphtho-1,2,3-triphosphorin.

P Valence Stabilizer #9a: Examples of 5-membered heterocyclic rings containing one phosphorus atom and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)-1-phospholene; 2,5-(P-phenylphosphino)-1-phospholene; 2-(P-phenylphosphino)-3-phospholene; 2,5-(P-phenylphosphino)-3-phospholene; 2-(P-phenylphosphino)phosphole; 2,5-(P-phenylphosphino)phosphole; 2-(P-phenylphosphino)benzophosphole; 7-(P-phenylphosphino)benzophosphole; and 1,8-(P-phenylphosphino)dibenzophosphole.

P Valence Stabilizer #9b: Examples of 5-membered heterocyclic rings containing two phosphorus atoms and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)-1,3-diphospholene; 2,5-(P-phenylphosphino)-1,3-diphospholene; 2-(P-phenylphosphino)-1,3-diphosphole; 2,5-(P-phenylphosphino)-1,3-diphosphole; 2-(P-phenylphosphino)benzodiphosphole; and 7-(P-phenylphosphino)benzodiphosphole.

P Valence Stabilizer #9c: Examples of 5-membered heterocyclic rings containing three phosphorus atoms and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)-1,3,4-triphosphole; and 2,5-(P-phenylphosphino)-1,3,4-triphosphole.

P Valence Stabilizer #10a: Examples of 6-membered heterocyclic rings containing one phosphorus atom and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)phosphorin; 2,5-(P-phenylphosphino)phosphorin; 2-(P-phenylphosphino)benzophosphorin; 7-(P-phenylphosphino)benzophosphorin; and 1,9-(P-phenylphosphino)acridophosphine.

P Valence Stabilizer #10b: Examples of 6-membered heterocyclic rings containing two phosphorus atoms and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)-4-diphosphorin; 2,6-(P-phenylphosphino)-4-diphosphorin; 2,3,5,6-(P-phenylphosphino)-4-diphosphorin; 2-(P-phenylphosphino)benzo-1,4-diphosphorin; 2,3-(P-phenylphosphino)benzo-1,4-diphosphorin; 2,8-(P-phenylphosphino)benzo-1,4-diphosphorin; 2,3,5,8-(P-phenylphosphino)benzo-1,4-diphosphorin; 1,9-(P-phenylphosphino)dibenzodiphosphorin; and 1,4,6,9-(P-phenylphosphino)dibenzodiphosphorin.

P Valence Stabilizer #10c: Examples of 6-membered heterocyclic rings containing three phosphorus atoms and having at least one additional phosphorus atom binding site not contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(P-phenylphosphino)-1,3,5-triphosphorin; 2,6-(P-phenylphosphino)-1,3,5-triphosphorin; 4-(P-phenylphosphino)-1,2,3-triphosphorin; and 8-(P-phenylphosphino)benzo-1,2,3-triphosphorin.

P Valence Stabilizer #11a: Examples of 5-membered heterocyclic rings containing one phosphorus atom and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1-phospholene; 2,2′,2′′-tri-1-phospholene; 2,2′-bi-3-phospholene; 2,2′, 2′′-tri-3-phospholene; 2,2′-biphosphole; 2,2′,2′′-triphosphole; and 2,2′-bibenzophosphole.

P Valence Stabilizer #11b: Examples of 5-membered heterocyclic rings containing two phosphorus atoms and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3-diphospholene; 2,2′-bi-1,3-diphosphole; and 2,2′-bibenzo-1,3-diphosphole.

P Valence Stabilizer #11c: Examples of 5-membered heterocyclic rings containing three phosphorus atoms and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3,4-triphosphole; and 2,2′,2′′-tri-1,3,4-triphosphole.

P Valence Stabilizer #12a: Examples of 6-membered heterocyclic rings containing one phosphorus atom and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-biphosphorin; 2,2′,2′′-triphosphorin; 2,2′,2′′,2′′′-tetraphosphorin; 2,2′-bibenzophosphorin; and 8,8′-bibenzophosphorin.

P Valence Stabilizer #12b: Examples of 6-membered heterocyclic rings containing two phosphorus atoms and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3,3′-bi-1,2-diphosphorin; 3,3′,3′′-tri-1,2-diphosphorin; 2,2′-bi-1,4-diphosphorin; 2,2′,2′′-tri-1,4-diphosphorin; 3,3′-bibenzo-1,2-diphosphorin; 8,8′-bibenzo-1,2-diphosphorin; 2,2′-bibenzo-1,4-diphosphorin; and 8,8′-bibenzo-1,4-diphosphorin.

P Valence Stabilizer #12c: Examples of 6-membered heterocyclic rings containing three phosphorus atoms and having at least one additional phosphorus atom binding site contained in a ring (P Monodentates, P—P Bidentates, P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3,5-triphosphorin; 2,2′,2′′-tri-1,3,5-triphosphorin; 4,4′-bi-1,2,3-triphosphorin; 4,4′-bibenzo-1,2,3-triphosphorin; and 8,8′-bibenzo-1,2,3-triphosphorin.

P Valence Stabilizer #13a: Examples of two-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein both binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P-diphenyldiphosphacyclobutane ([4]aneP2); P,P-diphenyldiphosphacyclopentane ([5]aneP2); P,P-diphenyldiphosphacyclohexane ([6]aneP2); P,P-diphenyldiphosphacycloheptane ([7]aneP2); P,P-diphenyldiphosphacyclooctane ([8]aneP2); P,P-diphenyldiphosphacyclobutene ([4]eneP2); P,P-diphenyldiphosphacyclopentene ([5]eneP2); P,P-diphenyldiphosphacyclohexene ([6]eneP2); P,P-diphenyldiphosphacycloheptene ([7]eneP2); and P,P-diphenyldiphosphacyclooctene ([8]eneP2).

P Valence Stabilizer #13b: Examples of three-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P,P-triphenyltriphosphacyclohexane ([6]aneP3); P,P,P-triphenyltriphosphacycloheptane ([7]aneP3); P,P,P-triphenyltriphosphacyclooctane ([8]aneP3); P,P,P-triphenyltriphosphacyclononane ([9]aneP3); P,P,P-triphenyltriphosphacyclodecane ([10]aneP3); P,P,P-triphenyltriphosphacycloundecane ([11]aneP3); P,P,P-triphenyltriphosphacyclododecane ([12]aneP3); P,P,P-triphenyltriphosphacyclohexatriene ([6]trieneP3); P,P,P-triphenyltriphosphacycloheptatriene ([7]trieneP3); P,P,P-triphenyltriphosphacyclooctatriene ([8]trieneP3); P,P,P-triphenyltriphosphacyclononatriene ([9]trieneP3); P,P,P-triphenyltriphosphacyclodecatriene ([10]trieneP3); P,P,P-triphenyltriphosphacycloundecatriene ([11]trieneP3); and P,P,P-triphenyltriphosphacyclododecatriene ([12]trieneP3).

P Valence Stabilizer #13c: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P,P,P-tetraphenyltetraphosphacyclooctane ([8]aneP4); P,P,P,P-tetraphenyltetraphosphacyclononane ([9]aneP4); P,P,P,P-tetraphenyltetraphosphacyclodecane ([10]aneP4); P,P,P,P-tetraphenyltetraphosphacycloundecane ([11]aneP4); P,P,P,P-tetraphenyltetraphosphacyclododecane ([12]aneP4); P,P,P,P-tetraphenyltetraphosphacyclotridecane ([13]aneP4); P,P,P,P-tetraphenyltetraphosphacyclotetradecane ([14]aneP4); P,P,P,P-tetraphenyltetraphosphacyclopentadecane ([15]aneP4); P,P,P,P-tetraphenyltetraphosphacyclohexadecane ([16]aneP4); P,P,P,P-tetraphenyltetraphosphacycloheptadecane ([17]aneP4); P,P,P,P-tetraphenyltetraphosphacyclooctadecane ([18]aneP4); P,P,P,P-tetraphenyltetraphosphacyclononadecane ([19]aneP4); and P,P,P,P-tetraphenyltetraphosphacycloeicosane ([20]aneP4).

P Valence Stabilizer #13d: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P Tridentates, or P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P,P,P,P-pentaphenylpentaphosphacyclodecane ([10]aneP5); P,P,P,P,P-pentaphenylpentaphosphacycloundecane ([11]aneP5); P,P,P,P,P-pentaphenylpentaphosphacyclododecane ([12]aneP5); P,P,P,P,P-pentaphenylpentaphosphacyclotridecane ([13]aneP5); P,P,P,P,P-pentaphenylpentaphosphacyclotetradecane ([14]aneP5); and P,P,P,P,P-pentaphenylpentaphosphacyclopentadecane ([15]aneP5).

P Valence Stabilizer #13e: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P—P Tridentates, P—P—P—P Tetradentates, or P—P—P—P—P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P,P,P,P,P-hexaphenylhexaphosphacyclododecane ([12]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclotridecane ([13]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclotetradecane ([14]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclopentadecane ([15]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclohexadecane ([16]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacycloheptadecane ([17]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclooctadecane ([18]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclononadecane ([19]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacycloeicosane ([20]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacycloheneicosane ([21]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclodocosane ([22]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclotricosane ([23]aneP6); P,P,P,P,P,P-hexaphenylhexaphosphacyclotetracosane ([24]aneP6).

P Valence Stabilizer #13f: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of phosphorus and are not contained in component heterocyclic rings (P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclohexadecane ([16]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacycloheptadecane ([17]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclooctadecane ([18]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclononadecane ([19]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacycloeicosane ([20]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacycloheneicosane ([21]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclodocosane ([22]aneP8); P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclotricosane ([23]aneP8); and P,P,P,P,P,P,P,P-octaphenyloctaphosphacyclotetracosane ([24]aneP8).

P Valence Stabilizer #14a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of phosphorus and are contained in component 5-membered heterocyclic rings (P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraphospholenes; tetraphospholes; tetraoxaphospholes; tetradiphospholenes; tetradiphospholes; and tetraoxadiphospholes.

P Valence Stabilizer #14b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of phosphorus and are contained in component 5-membered heterocyclic rings (P—P Tetradentates and P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaphospholenes; hexaphospholes; hexaoxaphospholes; hexadiphospholenes; hexadiphospholes; and hexaoxadiphospholes.

P Valence Stabilizer #14c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of phosphorus and are contained in component 5-membered heterocyclic rings (P—P Tridentates; P—P Tetradentates; or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: octaphospholenes; octaphospholes; octaoxaphospholes; octadiphospholenes; octadiphospholes; and octaoxadiphospholes.

P Valence Stabilizer #15a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of phosphorus and are contained in a combination of 5-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphatetraphospholenes; tetraphosphatetraphospholenes; diphosphatetraphospholes; tetraphosphatetraphospholes; diphoshatetradiphospholes; and tetraphosphatetradiphospholes.

P Valence Stabilizer #15b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of phosphorus and are contained in a combination of 5-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates, and P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphahexaphospholenes; triaphosphahexaphospholenes; diphosphahexaphospholes; triphosphahexaphospholes; diphoshahexadiphospholes; and triphosphahexadiphospholes.

P Valence Stabilizer #15c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of phosphorus and are contained in a combination of 5-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates, and P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphaoctaphospholenes; tetraphosphaoctaphospholenes; diphosphaoctaphospholes; tetraphosphaoctaphospholes; diphoshaoctadiphospholes; and tetraphosphaoctadiphospholes.

P Valence Stabilizer #16a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of phosphorus and are contained in component 6-membered heterocyclic rings (P—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclotetraphosphorins; cyclotetraaoxaphosphorins; cyclotetradiphosphorins; and cyclotetraoxadiphosphorins.

P Valence Stabilizer #16b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of phosphorus and are contained in component 6-membered heterocyclic rings (P—P Tridentates, P—P Tetradentates, and P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclohexaphosphorins; cyclohexaoxaphosphorins; cyclohexadiphosphorins; and cyclohexaoxadiphosphorins.

P Valence Stabilizer #16c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of phosphorus and are contained in component 6-membered heterocyclic rings (P—P Tridentates, P—P Tetradentates, and P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclooctaphosphorins; cyclooctaoxaphosphorins; cyclooctadiphosphorins; and cyclooctaoxadiphosphorins.

P Valence Stabilizer #17a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of phosphorus and are contained in a combination of 6-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphacyclotetraphosphorins; tetraphosphacyclotetraphosphorins; diphosphacyclotetraoxaphosphorins; tetraphosphacyclotetraoxaphosphorins; diphosphacyclotetradiphosphorins; tetraphosphacyclotetradiphosphorins; diphosphacyclotetraoxadiphosphorins; and tetraphosphacyclotetraoxadiphosphorins.

P Valence Stabilizer #17b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of phosphorus and are contained in a combination of 6-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphacyclohexaphosphorins; triphosphacyclohexaphosphorins; diphosphacyclohexaoxaphosphorins; triphosphacyclohexaoxaphosphorins; diphosphacyclohexadiphosphorins; triphosphacyclohexadiphosphorins; diphosphacyclohexaoxadiphosphorins; and triphosphacyclohexaoxadiphosphorins.

P Valence Stabilizer #17c: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all eight binding sites are composed of phosphorus and are contained in a combination of 6-membered heterocyclic rings and phosphine groups (P—P Tridentates, P—P Tetradentates, or P—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphacyclooctaphosphorins; tetraphosphacyclooctaphosphorins; diphosphacyclooctaoxaphosphorins; tetraphosphacyclooctaoxaphosphorins; diphosphacyclooctadiphosphorins; tetraphosphacyclooctadiphosphorins; diphosphacyclooctaoxadiphosphorins; and tetraphosphacyclooctaoxadiphosphorins.

O Valence Stabilizer #1: Examples of dithioperoxydicarbonic acids, bis(dithioperoxydicarbonic acids), poly(dithioperoxydicarbonic acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithioperoxydicarbonic acid, O-phenyldithioperoxydicarbonic acid; O-benzyldithioperoxydicarbonic acid; O-cyclohexyldithioperoxydicarbonic acid; O-norbornyldithioperoxydicarbonic acid; O,O′-diphenyldithioperoxydicarbonic acid; O,O′-dibenzyldithioperoxydicarbonic acid; O,O′-dicyclohexyldithioperoxydicarbonic acid; and O,O′-dinorbornyldithioperoxydicarbonic acid.

O Valence Stabilizer #2: Examples of imidodiphosphonic acids, hydrazidodiphosphonic acids, bis(imidodiphosphonic acids), bis(hydrazidodiphosphonic acids), poly(imidodiphosphonic acids), poly(hydrazidodiphosphonic acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodiphosphonic acid, methylimidodiphosphonic acid, isopropylimidodiphosphonic acid, tert-butylimidodiphosphonic acid, phenylimidodiphosphonic acid, pentafluorophenylimidodiphosphonic acid, benzylimidodiphosphonic acid, cyclohexylimidodiphosphonic acid, norbornylimidodiphosphonic acid, dimethylimidodiphosphonic acid, diisopropylimidodiphosphonic acid, di-tert-butylimidodiphosphonic acid, diphenylimidodiphosphonic acid, di-pentafluorophenylimidodiphosphonic acid, dibenzylimidodiphosphonic acid, dicyclohexylimidodiphosphonic acid, and dinorbornylimidodiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

O Valence Stabilizer #3: Examples of imidodiphosphonamides, hydrazidodiphosphonamides, bis(imidodiphosphonamides), bis(hydrazidodiphosphonamides), poly(imidodiphosphonamides), and poly(hydrazidodiphosphonamides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: imidodiphosphonamide, N-methylimidodiphosphonamide, N-isopropylimidodiphosphonamide, N-tert-butylimidodiphosphonamide, N-phenylimidodiphosphonamide, N-pentafluorophenylimidodiphosphonamide, N-benzylimidodiphosphonamide, N-cyclohexylimidodiphosphonamide, N-norbornylimidodiphosphonamide, N,N′′′-dimethylimidodiphosphonamide, N,N′′′-diisopropylimidodiphosphonamide, N,N′′′-di-tert-butylimidodiphosphonamide, N,N′′′-diphenylimidodiphosphonamide, N,N′′′-di-pentafluorophenylimidodiphosphonamide, N,N′′′-dibenzylimidodiphosphonamide, N,N′′′-dicyclohexylimidodiphosphonamide, and N,N′′′-dinorbornylimidodiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

O Valence Stabilizer #4: Examples of diphosphonamides, bis(diphosphonamides), and poly(diphosphonamides) (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphosphonamide, N-methyldiphosphonamide, N-isopropyldiphosphonamide, N-tert-butyldiphosphonamide, N-phenyldiphosphonamide, N-pentafluorophenyldiphosphonamide, N-benzyldiphosphonamide, N-cyclohexyldiphosphonamide, N-norbornyldiphosphonamide, N,N′′′-dimethyldiphosphonamide, N,N′′′-diisopropyldiphosphonamide, N,N′′′-di-tert-butyldiphosphonamide, N,N′′′-diphenyldiphosphonamide, N,N′′′-di-pentafluorophenyldiphosphonamide, N,N′′′-dibenzyldiphosphonamide, N,N′′′-dicyclohexyldiphosphonamide, and N,N′′′-dinorbornyldiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

O Valence Stabilizer #5: Examples of carbonates and bis(carbonates) (O—O Bidentates and O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: carbonate; bicarbonate; O,O-diethylcarbonate; diisopropylcarbonate; diphenylcarbonate; dibenzylcarbonate; dicyclohexylcarbonate; and dinorbornylcarbonate.

O Valence Stabilizer #6: Examples of carbazates (carbazides), bis(carbazates), and poly(carbazates) (O—O Bidentates, O—O Tridentates, and O—O Tetradentates; or possibly N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-dimethylcarbazate; N,N′-di(trifluoromethyl)carbazate; N,N′-diethylcarbazate; N,N′-diphenylcarbazate; N,N′-dibenzylcarbazate; N,N′-di(pentafluorophenyl)carbazate; N,N′-dicyclohexylcarbazate; and N,N′-dinorbornylcarbazate.

O Valence Stabilizer #7: Examples of arsonic acids, bis(arsonic acids), poly(arsonic acids), and derivatives thereof (O—O Bidentates, O—O Tridentates, O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: arsonic acid, O-phenylarsonic acid, O-benzylarsonic acid, O-cyclohexylarsonic acid, O-norbornylarsonic acid, O,O-diphenylarsonic acid, O,O-dibenzylarsonic acid, O,O-dicyclohexylarsonic acid, O,O-dinorbornylarsonic acid; and aminophenylarsonic acids.

O Valence Stabilizer #8: Examples of alkyl- and aryl-borates and bis(borates) (O—O Bidentates and O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triethyl borate; diisopropyl borate; diphenyl borate; dibenzyl borate; dicyclohexyl borate; and dinorbornyl borate.

O Valence Stabilizer #9: Examples of alkyl- and aryl-boronates and bis(boronates) (O—O Bidentates and O—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diethyl boronate; diisopropyl boronate; diphenyl boronate; dibenzyl boronate; dicyclohexyl boronate; and dinorbornyl boronate. [Note: boronates tend to stabilize lower oxidation states in metal ions.]

O Valence Stabilizer #10: Examples of phosphine P-oxides and amino-substituted phosphine oxides (O Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethylphosphine oxide (TMPO); triethylphosphine oxide (TEPO); triphenylphosphine oxide (TPhPO); tribenzylphosphine oxide (TBzPO); tricyclohexylphosphine oxide (TcHxPO); and trinorbornylphosphine oxide for phosphine P-oxides; and hexamethylphosphoramide (HMPA); trimorpholinophosphine oxide (TMrPO); tripiperidinophosphine oxide; tripyrrolidinophosphine oxide; and tri(cyclohexylamino)phosphine oxide for amino-substituted phosphine oxides.

O Valence Stabilizer #11: Examples of arsine As-oxides and amino-substituted arsine oxides (O Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trimethylarsine oxide (TMAsO); triethylarsine oxide (TEAsO); triphenylarsine oxide (TPhAsO); tribenzylarsine oxide (TBzAsO); tricyclohexylarsine oxide (TcHxAsO); and trinorbornylarsine oxide for arsine As-oxides; and hexamethylarsonamide; trimorpholinoarsine oxide; tripiperidinoarsine oxide; tripyrrolidinoarsine oxide; and tri(cyclohexylamino)arsine oxide for amino-substituted arsine oxides.

O Valence Stabilizer #12a: Examples of 5-membered heterocyclic rings containing one oxygen atom (O monodentate) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: furan, dihydrofuran, oxazole, isoxazole, oxadiazole, oxatriazole, oxathiole, benzofuran, benzodihydrofuran, benzoxazole, benzisoxazole, benzoxadiazole (benzofurazan), dibenzofuran, dibenzoxazole, dibenzisoxazole, naphthofuran, naphthoxazole, naphthisoxazole, and naphthoxadiazole.

O Valence Stabilizer #12b: Examples of 5-membered heterocyclic rings containing two oxygen atoms (O monodentate or O—O bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dioxolane, benzodioxolane, and naphthodioxolane.

O Valence Stabilizer #13a: Examples of 6-membered heterocyclic rings containing one oxygen atom (O monodentate) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydropyran, pyran, oxazine, oxadiazine, oxatriazine, oxathiin, benzopyran, benzoxazine, benzoxadiazine, dibenzopyran, naphthopyran, naphthoxazine, and naphthoxadiazine.

O Valence Stabilizer #13b: Examples of 6-membered heterocyclic rings containing two oxygen atoms (O monodentate or O—O bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydrodioxane, dioxane, benzodioxane, dibenzodioxane, and naphthodioxane.

O Valence Stabilizer #14a: Examples of 5-membered heterocyclic rings containing one oxygen atom and having at least one additional oxygen atom binding site not contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,5-dihydroxy-2,5-dihydrofuran; 2,5-bis(hydroxymethyl)-2,5-dihydrofuran; 2,5-bis(2-hydroxyphenyl)-2,5-dihydrofuran; 2,5-dihydroxyfuran; 2,5-bis(hydroxymethyl)furan; and 2,5-bis(2-hydroxyphenyl)furan.

O Valence Stabilizer #14b: Examples of 5-membered heterocyclic rings containing two oxygen atoms and having at least one additional oxygen atom binding site not contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxy-1,3-dioxolane; 2-hydroxymethyl)-1,3-dioxolane; 4,5-dihydroxy-1,3-dioxolane; 4,5-bis(2-hydroxyphenyl)-1,3-dioxolane; 2-hydroxybenzodioxolane; and 7-hydroxybenzodioxolane.

O Valence Stabilizer #15a: Examples of 6-membered heterocyclic rings containing one oxygen atom and having at least one additional oxygen atom binding site not contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,6-dihydroxy-2,5-dihydropyran; 2,6-bis(hydroxymethyl)-2,5-dihydropyran; 2,6-bis(2-hydroxyphenyl)-2,5-dihydropyran; 2,6-dihydroxypyran; 2,6-bis(hydroxymethyl)pyran; 2,6-bis(2-hydroxyphenyl)pyran; 2-hydroxy-1-benzopyran; 8-hydroxy-1-benzopyran; and 1,9-dihydroxydibenzopyran.

O Valence Stabilizer #15b: Examples of 6-membered heterocyclic rings containing two oxygen atoms and having at least one additional oxygen atom binding site not contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxy-1,4-dioxane; 2,6-dihydroxy-1,4-dioxane; 2,6-bis(2-hydroxyphenyl)-1,4-dioxane; 2,3-dihydroxy-1,4-benzodioxane; 5,8-dihydroxy-1,4-benzodioxane; 1,8-dihydroxydibenzodioxane; and 1,4,5,8-tetrahydroxydibenzodioxane.

O Valence Stabilizer #16a: Examples of 5-membered heterocyclic rings containing one oxygen atom and having at least one additional oxygen atom binding site contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydrofuran; 2,2′,2′′-tri-2,5-dihydrofuran; 2,2′-bifuran; 2,2′,2′′-trifuran; 1,1′-bis(dibenzofuran); and polyfurans.

O Valence Stabilizer #16b: Examples of 5-membered heterocyclic rings containing two oxygen atoms and having at least one additional oxygen atom binding site contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,3-dioxolane; 4,4′-bi-1,3-dioxolane; 7,7′-bi-1,2-benzodioxolane; and 3,3′-bi-1,2-benzodioxolane.

O Valence Stabilizer #17a: Examples of 6-membered heterocyclic rings containing one oxygen atom and having at least one additional oxygen atom binding site contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydropyran; 2,2′,2′′-tri-2,5-dihydropyran; 2,2′-bipyran; 2,2′,2′′-tripyran; and 1,1′-bis(dibenzopyran).

O Valence Stabilizer #17b: Examples of 6-membered heterocyclic rings containing one oxygen atom and having at least one additional oxygen atom binding site contained in a ring (O monodentates, O—O bidentates, O—O tridentates, O—O tetradentates, or O—O hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-1,4-dioxane; 2,2′-bi-1,3-dioxane; 5,5′-bi-1,4-benzodioxane; and 2,2′-bi-1,3-benzodioxane.

O Valence Stabilizer #18a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 8-crown-4; 10-crown-4; 12-crown-4; 14-crown-4; 16-crown-4; 18-crown-4; 20-crown-4; dibenzo-8-crown-4; dibenzo-10-crown-4; dibenzo-12-crown-4; dibenzo-14-crown-4; dibenzo-16-crown-4; dibenzo-18-crown-4; dibenzo-20-crown-4; tetrabenzo-8-crown-4; tetrabenzo-10-crown-4; tetrabenzo-12-crown-4; tetrabenzo-14-crown-4; tetrabenzo-16-crown-4; tetrabenzo-18-crown-4; and tetrabenzo-20-crown-4.

O Valence Stabilizer #18b: Examples of five-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 10-crown-5; 15-crown-5; 20-crown-5; 25-crown-5; pentabenzo-10-crown-5; pentabenzo-15-crown-5; pentabenzo-20-crown-5; and pentabenzo-25-crown-5.

O Valence Stabilizer #18c: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 12-crown-6; 18-crown-6; 24-crown-6; 30-crown-6; 36-crown-6; tribenzo-12-crown-6; tribenzo-18-crown-6; tribenzo-24-crown-6; tribenzo-30-crown-6; tribenzo-36-crown-6; hexabenzo-12-crown-6; hexabenzo-18-crown-6; hexabenzo-24-crown-6; hexabenzo-30-crown-6; and hexabenzo-36-crown-6.

O Valence Stabilizer #18d: Examples of seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 14-crown-7; 21-crown-7; 28-crown-7; 35-crown-7; heptabenzo-14-crown-7; heptabenzo-21-crown-7; heptabenzo-28-crown-7; and heptabenzo-35-crown-7.

O Valence Stabilizer #18e: Examples of eight-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 16-crown-8; 24-crown-8; 32-crown-8; 40-crown-8; 48-crown-8; tetrabenzo-16-crown-8; tetrabenzo-24-crown-8; tetrabenzo-32-crown-8; tetrabenzo-40-crown-8; tetrabenzo-48-crown-8; octabenzo-16-crown-8; octabenzo-24-crown-8; octabenzo-32-crown-8; octabenzo-40-crown-8; and octabenzo-48-crown-8.

O Valence Stabilizer #18f: Examples of ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually ester or hydroxyl groups) and are not contained in component heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 20-crown-10; 30-crown-10; 40-crown-10; 50-crown-10; pentabenzo-20-crown-10; pentabenzo-30-crown-10; pentabenzo-40-crown-10; and pentabenzo-50-crown-10.

O Valence Stabilizer #19: Examples of four-, five-, six-, seven-, eight-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen and are contained in component 5-membered heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrafurans, tetrabenzofurans; pentafurans; pentabenzofurans; hexafurans; hexabenzofurans; heptafurans; heptabenzofurans; octafurans; octabenzofurans; decafurans; and decabenzofurans.

O Valence Stabilizer #20: Examples of four-, five-, six-, seven-, eight-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen and are contained in component 6-membered heterocyclic rings (O—O Bidentates, O—O Tridentates, O—O Tetradentates, and O—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetrapyrans, tetrabenzopyrans; pentapyrans; pentabenzopyans; hexapyans; hexabenzopyans; heptapyans; heptabenzopyans; octapyans; octabenzopyans; decapyans; and decabenzopyans.

N—S Valence Stabilizer #1: Examples of thioimidates, dithioimidates, polythioimidates, and derivatives of thioimidic acid (N—S bidentates and N—S tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S-methyl formathioimidate; S-ethyl formathioimidate; S-methyl acetathioimidate; S-ethyl acetathioimidate; S-methyl benzthioimidate; S-ethyl benzthioimidate; S-methyl cyclohexylthioimidate; S-ethyl cyclohexylthioimidate; S-methyl pentafluorobenzthioimidate; S-ethyl pentafluorobenzthioimidate; S-methyl 2-pyridylthioimidate; S-ethyl 2-pyridylthioimidate; S,S′-dimethyl benzdithioimidate; S,S′-dimethyl tetrafluorobenzdithioimidate; 2-iminothiolane; and 2-iminotetrahydrothiopyran. [Note: Many thioimidate complexes are decomposed by water, but their stability can be enhanced through the use of fluorinated solubility control anions (e.g. PF6−).]

N—S Valence Stabilizer #2: Examples of thioguanylureas, guanidinothioureas, bis(thioguanylureas), bis(guanidinothioureas, poly(thioguanylureas), and poly(guanidinothioureas) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioguanylurea (amidinothiourea); guanidinothiourea; methylthioguanylurea; ethylthioguanylurea; isopropylthioguanylurea; butylthioguanylurea; benzylthioguanylurea; phenylthioguanylurea; tolylthioguanylurea; naphthylthioguanylurea; cyclohexylthioguanylurea; norbornylthioguanylurea; adamantylthioguanylurea; dimethylthioguanylurea; diethylthioguanylurea; diisopropylthioguanylurea; dibutylthioguanylurea; dibenzylthioguanylurea; diphenylthioguanylurea; ditolylthioguanylurea; dinaphthylthioguanylurea; dicyclohexylthioguanylurea; dinorbornylthioguanylurea; diadamantylthioguanylurea; ethylenebis(thioguanylurea); propylenebis(thioguanylurea); phenylenebis(thioguanylurea); piperazinebis(thioguanylurea); oxalylbis(thioguanylurea); malonylbis(thioguanylurea); succinylbis(thioguanylurea); and phthalylbis(thioguanylurea). [Note: thioguanylureas generally tend to favor lower oxidation states in complexed metals.]

N—S Valence Stabilizer #3: Examples of amidinothioamides, guanidinothioamides, bis(amidinothioamides), bis(guanidinothioamides), poly(amidinothioamides), and poly(guanidinothioamides) (including both N-amidinothioamides and 2-amidinothioacetamides) (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: amidinothioacetamide; guanidinothioamide, amidinothiopropanamide; amidinothiobutanamide; amidinothiobenzamide; amidinothiotoluamide; amidinothiocyclohexamide; N-methylamidinothioacetamide; N-ethylamidinothiopropanamide; N-propylamidinothiobutanamide; N-phenylamidinothiobenzamide; N-tolylamidinothiotoluamide; N-cyclohexylamidinothiocyclohexamide; bis(amidinothiooxamide); bis(amidinothiomalonamide); bis(amidinothiosuccinamide); bis(amidinothiophthalamide); 2-amidinothioacetamide (thiomalonamamidine); N-methyl-2-amidinothioacetamide; N-ethyl-2-amidinothioacetamide; N-phenyl-2-amidinothioacetamide; N-benzyl-2-amidinothioacetamide; N-cyclohexyl-2-amidinothioacetamide; N,N′-dimethyl-2-amidinothioacetamide; N,N′-diethyl-2-amidinothioacetamide; N,N′-diphenyl-2-amidinothioacetamide; N,N′-dibenzyl-2-amidinothioacetamide; and N,N′-dicyclohexyl-2-amidinothioacetamide. [Note: amidinothioamides generally tend to favor lower oxidation states in complexed metals.]

N—S Valence Stabilizer #4: Examples of imidoylthioamides, bis(imidoylthioamides), and poly(imidoylthioamides) (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: acetimidoylthioacetamide; acetimidoylthiopropanamide; acetimidoylthiobutanamide; acetimidoylthiobenzamide; acetimidolylthiotoluamide; acetimidoylthiocyclohexamide; propimidoylthiopropanamide; butimidoylthiobutanamide; benzimidoylthiobenzamide; ethylenebis(acetimidoylthioacetamide); propylenebis(acetimidoylthioacetamide); and phenylenebis(acetimidoylthioacetamide). [Note: imidoylthioamides generally tend to favor lower oxidation states in complexed metals.]

N—S Valence Stabilizer #5: Examples of thioureas, bis(thioureas), and poly(thioureas), including thiourylene complexes (N—S bidentates and N—S tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiourea; methylthiourea; ethylthiourea; isopropylthiourea; benzylthiourea; phenylthiourea; cyclohexylthiourea; naphthylthiourea (ntu); biphenylthiourea; norbornylthiourea; adamantylthiourea; N,N′-dimethylthiourea; N,N′-diethylthiourea; N,N′-diisopropylthiourea; N,N′-dibenzylthiourea; N,N′-dicyclohexylthiourea; N,N′dinapthylthiourea; N,N′-dibiphenylthiourea; N,N′-dinorbornylthiourea; N,N′-diadamantylthiourea; tetramethylthiourea; ethylenethiourea (2-imidazolidinethione)(etu); 4,5-dihydroxy-2-imidazolinethione (dhetu); propylenethiourea; N-(thiazol-2-yl)thiourea; diphenylphosphinothioyl thioureas; allylthiourea; N-allyl-N′-pyridylthiourea; N-allyl-N′-anisylthiourea; N-allyl-N′-naphthylthiourea; N-allyl-N′-phenylthiourea; thioglycoluril (acetylenethiourea); and bis(pyridylmethyl)thiourea. [Note: thioureas generally tend to favor lower oxidation states in complexed metals.]

N—S Valence Stabilizer #6: Examples of thiocarboxamides, bis(thiocarboxamides), and poly(thiocarboxamides), (N—S bidentates, N—S tridentates, and N—S tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiocarbamide (tu); thioacetamide (taa); thiopropionamide; thiobutanamide; thiobenzamide (1-phenylthioformamide)(tba); 1-naphthylthioformamide; 1-cyclohexylthioformamide); 1-norbornylthioformamide; 1-adamantylthioformamide; N,N-dimethylthioformamide; N,N-dimethylthioacetamide; pyridine-2-thiocarboxamide (thiopicolinamide); pyrazine-2,3-dithiocarboxamide; thionicotinamide; 2-thiophenethiocarboxamide; N,N-dimethylthiobenzamide; N-ethylthiocarbamide (N-etu); tetramethylthiocarbamide (tmtu); 2-thioacetamidothiazole (tatz); and polythioacrylamides. [Note: thiocarboxamides generally tend to favor lower oxidation states in complexed metals.]

N—S Valence Stabilizer #7: Examples of imidosulfurous diamides and bis(imidosulfurous diamides) (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-diphenylimidosulfurous diamide; N,N′-dibenzylimidosulfurous diamide; and phenylenebis(imidosulfurous diamide). [Note: These complexes tend to hydrolyze unless stabilized with a fluorinated anionic solubility control agent. The sulfite (S+4) valence of the sulfur atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—S Valence Stabilizer #8: Examples of sulfurdiimines, bis(sulfurdiimines), and poly(sulfurdiimines) (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-diphenylsulfurdiimine; N,N′-dibenzylsulfurdiimine; and phenylenebis(sulfurdiimine). [Note: These complexes tend to hydrolyze unless stabilized with a fluorinated anionic solubility control agent. The sulfite (S+4) valence of the sulfur atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—S Valence Stabilizer #9: Examples of phosphonimidothioic acid, phosphonimidodithioic acid, bis(phosphonimidothioic acid); bis(phosphonimidodithioic acid), and derivatives thereof (N—S Bidentates, N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonimidothioic acid, phosphonimidodithioic acid; O-phenylphosphonimidothioic acid; O-benzylphosphonimidothioic acid; O-cyclohexylphosphonimidothioic acid; O-norbornylphosphonimidothioic acid; S-phenylphosphonimidodithioic acid; S-benzylphosphonimidodithioic acid; S-cyclohexylphosphonimidodithioic acid; and S-norbornylphosphonimidodithioic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—S Valence Stabilizer #10: Examples of phosphonothioic diamides, bis(phosphonothioic diamides), and poly(phosphonothioic diamides) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonothioic diamide, phosphonothioic dihydrazide, phosphonamidothioic hydrazide, N-phenylphosphonothioic diamide, N-benzylphosphonothioic diamide, N-cyclohexylphosphonothioic diamide, and N-norbornylphosphonothioic diamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—S Valence Stabilizer #11: Examples of phosphonamidothioic acid, phosphonamidimidodithioic acid, bis(phosphonamidothioic acid), bis(phosphonamidimidodithioic acid), poly(phosphonamidothioic acid), and poly(phosphonamidimidodithioic acid), and derivatives thereof (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonamidothioic acid, phosphonamidimidodithioic acid, phosphonohydrazidodithioic acid, phosphonohydrazidothioic acid, S-phenylphosphonamidimidodithioic acid, S-benzylphosphonamidimidodithioic acid, S-cyclohexylphosphonamidimidodithioic acid, and S-norbornylphosphonamidimidodithioic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—S Valence Stabilizer #12: Examples of beta-aminothiones (N-substituted 3-amino-2-propenethioaldehydes), bis(beta-aminothiones), and poly(beta-aminothiones) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-methylamino-3-penten-2-thione; 4-ethylamino-3-penten-2-thione; 4-isopropylamino-3-penten-2-thione; 4-phenylamino-3-penten-2-thione; 4-naphthylamino-3-penten-2-thione; 4-cyclohexylamino-3-penten-2-thione; 4-norbornylamino-3-penten-2-thione; 4-hydroxyamino-3-penten-2-thione; 3-methylamino-1-phenyl-2-butenethioaldehydel; 3-ethylamino-1-phenyl-2-butenethioaldehyde; 3-isopropylamino-1-phenyl-2-butenethioaldehyde; 3-phenylamino-1-phenyl-2-butenethioaldehyde; 3-naphthylamino-1-phenyl-2-butenethioaldehyde; 3-cyclohexylamino-1-phenyl-2-butenethioaldehyde; 3-norbornylamino-1-phenyl-2-butenethioaldehyde; 3-hydroxyamino-1-phenyl-2-butenethioaldehyde; 3-phenylamino-1,3-diphenyl-2-propenethioaldehyde; 3-cyclohexylamino-1,3-dicyclohexyl-2-propenethioaldehyde; and 3-norbornylamino-1,3-dinorbornyl-2-propenethioaldehyde.

N—S Valence Stabilizer #13: Examples of 3-aminothioacrylamides (3-amino-2-thiopropenamides), 3,3-diaminothioacrylamides, bis(3-aminothioacrylamides), bis(3,3-diaminothioacrylamides), poly(3-aminothioacrylamides), and poly(3,3-diaminothioacrylamides) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-methylaminothioacrylamide; 3-ethylaminothioacrylamide, 3-isopropylaminothioacrylamide, 3-phenylaminothioacrylamide; 3-naphthylaminothioacrylamide; 3-cyclohexylaminothioacrylamide; 3-norbornylaminothioacrylamide; 3-hydroxyaminothioacrylamide; N-methyl-3-methylaminothioacrylamide; N-ethyl-3-ethylaminothioacrylamide, N-isopropyl-3-isopropylaminothioacrylamide, N-phenyl-3-phenylaminothioacrylamide; N-naphthyl-3-naphthylaminothioacrylamide; N-cyclohexyl-3-cyclohexylaminothioacrylamide; N-norbornyl-3-norbornylaminothioacrylamide; 3-amino-3-methylaminothioacrylamide; 3-amino-3-ethylaminothioacrylamide, 3-amino-3-isopropylaminothioacrylamide, 3-amino-3-phenylaminothioacrylamide; 3-amino-3-naphthylaminothioacrylamide; 3-amino-3-cyclohexylaminothioacrylamide; 3-amino-3-norbornylaminothioacrylamide; and 3-amino-3-hydroxyaminothioacrylamide.

N—S Valence Stabilizer #14: Examples of 3-aminothioacrylic acids (3-amino-2-thiopropenoic acids), 3-mercapto-3-aminothioacrylic acids, bis(3-aminothioacrylic acids), bis(3-mercapto-3-aminothioacrylic acids), poly(3-aminothioacrylic acids), and poly(3-mercapto-3-aminothioacrylic acids), and derivatives thereof (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-aminothioacrylic acid; 3-mercapto-3-aminothioacrylic acid; 3-methylaminothioacrylic acid; 3-ethylaminothioacrylic acid; 3-isopropylaminothioacrylic acid; 3-phenylaminothioacrylic acid; 3-naphthylaminothioacrylic acid; 3-cyclohexylaminothioacrylic acid; 3-norbornylaminothioacrylic acid; 3-hydroxyaminothioacrylic acid; methyl 3-methylaminothioacrylate; ethyl 3-ethylaminothioacrylate; isopropyl 3-isopropylaminothioacrylate; benzyl 3-phenylaminothioacrylate; naphthyl 3-naphthylaminothioacrylate; cyclohexyl 3-cyclohexylaminothioacrylate; and norbornyl 3-norbornylaminothioacrylate.

N—S Valence Stabilizer #15: Examples of N-thioacyl benzylidenimines, bis(N-thioacyl benzylidenimines), and poly(N-thioacyl benzylidenimines) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-thioformyl benzylidenimine, N-thioacetyl benzylidenimine; N-thiobenzoyl benzylidenimine; and N-pentafluorothiobenzoyl benzylidenimine.

N—S Valence Stabilizer #16: Examples of thiocarbonyl oximes, bis(thiocarbonyl oximes), and poly(thiocarbonyl oximes) (N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: butane-3-thione-2-one monoxime); and diphenylethane-2-thione-1-one monoxime.

N—S Valence Stabilizer #17: Examples of mercapto oximes, bis(mercapto oximes), and poly(mercapto oximes) (including 2-sulfur heterocyclic oximes) (N—S Bidentates, N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-mercaptobutan-2-one oxime; 4-mercaptohexan-3-one oxime; (1,2-diphenyl-2-mercaptoethanone oxime); 1,2-di(trifluoromethyl)-2-mercaptoethanone oxime; 1,2-dicyclohexyl-2-mercaptoethanone oxime; 1,2-dinorbornyl-2-mercaptoethanone oxime; 2-mercaptobenzaldehyde oxime; 2-mercapto-1-naphthaldehyde oxime; thiophene-2-aldoxime; methyl 2-thiophenyl ketoxime; and phenyl 2-thiophenyl ketoxime.

N—S Valence Stabilizer #18: Examples of 2-nitrothiophenols (2-nitrobenzenethiols) (N—S Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-nitrothiophenol; 2,3-dinitrothiophenol; 2,4-dinitrothiophenol; 2,5-dinitrothiophenol; 2,6-dinitrothiophenol; 1-nitro-2-naphthalenethiol; and 2-nitro-1-naphthalenethiol.

N—S Valence Stabilizer #19: Examples of 2-nitrilothiophenols (2-nitrilobenzenethiols) (N—S Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-cyanothiophenol; 2,3-dicyanothiophenol; 2,4-dicyanothiophenol; 2,5-dicyanothiophenol; 2,6-dicyanothiophenol; 1-cyano-2-naphthalenethiol; and 2-cyano-1-naphthalenethiol.

N—S Valence Stabilizer #20: Examples of thiohydrazides, bis(thiohydrazides), and poly(thiohydrazides) (N—S Bidentates and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioformic hydrazide; thioacetic hydrazide; thiopropionic hydrazide; thiobenzoic hydrazide; thiophthalhydrazide; thiosalicylic hydrazide; thionaphthoic hydrazides; thionorbornaneacetic hydrazide; thionicotinic hydrazide; and thioisonicotinic hydrazide. [Note: Thiohydrazides prefer complexation with lower oxidation states in metal ions.]

N—S Valence Stabilizer #21: Examples of thiosemicarbazides, bis(thiosemicarbazides), and poly(thiosemicarbazides) (N—S Bidentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiosemicarbazide (tsc); thiosemicarbazide diacetic acid (tsda); 1-methylthiosemicarbazide (1mts); 1-ethylthiosemicarbazide; 1-isopropylthiosemicarbazide; 1-phenylthiosemicarbazide (lpts)(cryogenine); 1-benzylthiosemicarbazide; 1-cyclohexylthiosemicarbazide; 1-norbornylthiosemicarbazide; 4-methylthiosemicarbazide (4mts); 4-ethylthiosemicarbazide; 4-isopropylthiosemicarbazide; 4-phenylthiosemicarbazide (4-pts); 4-benzylthiosemicarbazide; 4-cyclohexylthiosemicarbazide; 4-norbornylthiosemicarbazide; nicotinic thiosemicarbazide; isonicotinic thiosemicarbazide; and 4-phenyl-1-benzenesulfonyl-3-thiosemicarbazide (pbst). [Note: Thiosemicarbazides prefer complexation with lower oxidation states in metal ions.]

N—S Valence Stabilizer #22: Examples of five-, seven-, or nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) or sulfur (usually thiols, mercaptans, or thiocarbonyls) and are not contained in component heterocyclic rings (N—S Tridentates, N—S Tetradentates, and N—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triazadithiacyclodecane ([10]aneS2N3); triazadithiacycloundecane ([11]aneS2N3); triazadithiacyclododecane ([12]aneS2N3); triazadithiacyclotridecane ([13]aneS2N3); triazadithiacyclotetradecane ([14]aneS2N3); triazadithiacyclopentadecane ([15]aneS2N3); thiomorpholine; and thiazolidine.

N—S Valence Stabilizer #23: Examples of five- or seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or sulfur and are contained in component heterocyclic rings (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiopyrantripyridines; dithiophenetripyrroles; trithiopyrantetrapyridines; and trithiophenetetrapyrroles.

N—S Valence Stabilizer #24: Examples of five-, seven-, or nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or sulfur and are contained in a combination of heterocyclic rings and amine, imine, thiol, mercapto, or thiocarbonyl groups (N—S Bidentates, N—S Tridentates, N—S Tetradentates, or N—S Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azathiapentaphyrins; diazadithiapentaphyrins; azathiapentaphyrins; and diazadithiapentaphyrins.

N—O Valence Stabilizer #1: Examples of imidates, diimidates, polyimidates, and derivatives of imidic acid (N—O bidentates and N—O tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: O-methyl formimidate; O-ethyl formimidate; O-methyl acetimidate; O-ethyl acetimidate; O-methyl benzimidate; O-ethyl benzimidate; O-methyl cyclohexylimidate; O-ethyl cyclohexylimidate; O-methyl pentafluorobenzimidate; O-ethyl pentafluorobenzimidate; O-methyl 2-pyridylimidate; O-ethyl 2-pyridylimidate; O,O′-dimethyl benzdiimidate; O,O′-dimethyl tetrafluorobenzdiimidate; 2-iminotetrahydrofuran; and 2-iminotetrahydropyran. [Note: Most imidate complexes are decomposed by water, but their stability can be enhanced through the use of fluorinated solubility control anions (e.g. PF6−).]

N—O Valence Stabilizer #2: Examples of pseudoureas, bis(pseudoureas), and poly(pseudoureas) (N—O bidentates and N—O tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: O-methyl pseudourea; O-ethyl pseudourea; O-isopropyl pseudourea; O-benzyl pseudourea; O-cyclohexyl pseudourea; O-norbornyl pseudourea; O-pentafluorobenzyl pseudourea; N-methyl pseudourea; N-ethyl pseudourea; N-isopropyl pseudourea; N-benzyl pseudourea; N-cyclohexyl pseudourea; N-norbornyl pseudourea; and N-pentafluorobenzyl pseudourea.

N—O Valence Stabilizer #3: Examples of 2-amidinoacetates, bis(2-amidinoacetates), and poly(2-amidinoacetates) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-methyl-2-amidinoacetate; O-methyl-2-amidinoacetate; N-benzyl-2-amidinoacetate; and O-benzyl-2-amidinoacetate. [Note: many 2-amidinoacetates tend to hydrolyze in water. This can be minimized through the use of fluorinated solubility control anions such as PF6−.]

N—O Valence Stabilizer #4: Examples of ureas, bis(ureas), and poly(ureas), including urylene complexes (N—O bidentates and N—O tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: urea; methylurea; ethylurea; isopropylurea; benzylurea; cyclohexylurea; naphthylurea; biphenylurea; norbornylurea; adamantylurea; N,N′-dimethylurea; N,N′-diethylurea; N,N′-diisopropylurea; N,N′-dibenzylurea; N,N′-dicyclohexylurea; N,N′dinapthylurea; N,N′-dibiphenylurea; N,N′-dinorbornylurea; N,N′-diadamantylurea; ethyleneurea (2-imidazolidone); propyleneurea; glycoluril (acetyleneurea); and N,N′-bis(4-nitrophenyl)urea.

N—O Valence Stabilizer #5: Examples of phosphonimidic acid, bis(phosphonimidic acid), poly(phosphonimidic acid), and derivatives thereof (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonimidic acid; O-phenylphosphonimidic acid; O-benzylphosphonimidic acid; O-cyclohexylphosphonimidic acid; and O-norbornylphosphonimidic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—O Valence Stabilizer #6: Examples of phosphonamidic acid, phosphonic diamide, bis(phosphonamidic acid), bis(phosphonic diamide), poly(phosphonamidic acid), poly(phosphonic diamide), and derivatives thereof (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphonamidic acid, phosphonic diamide, phosphonamidic hydrazide, phosphonic dihydrazide, O-phenylphosphonamidic acid, O-benzylphosphonamidic acid, O-cyclohexylphosphonamidic acid, O-norbornylphosphonamidic acid, N-benzylphosphonic diamide, N-phenylphosphonic diamide, N-cyclohexylphosphonic diamide, and N-norbornylphosphonic diamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

N—O Valence Stabilizer #7: Examples of beta-ketoamines (N-substituted 3-amino-2-propenals), bis(beta-ketoamines), and poly(beta-ketoamines) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-methylamino-3-penten-2-one; 4-ethylamino-3-penten-2-one; 4-isopropylamino-3-penten-2-one; 4-phenylamino-3-penten-2-one; 4-naphthylamino-3-penten-2-one; 4-cyclohexylamino-3-penten-2-one; 4-norbornylamino-3-penten-2-one; 4-hydroxyamino-3-penten-2-one; 3-methylamino-1-phenyl-2-butenal; 3-ethylamino-1-phenyl-2-butenal; 3-isopropylamino-1-phenyl-2-butenal; 3-phenylamino-1-phenyl-2-butenal; 3-naphthylamino-1-phenyl-2-butenal; 3-cyclohexylamino-1-phenyl-2-butenal; 3-norbornylamino-1-phenyl-2-butenal; 3-hydroxyamino-1-phenyl-2-butenal; 3-phenylamino-1,3-diphenyl-2-propenal; 3-cyclohexylamino-1,3-dicyclohexyl-2-propenal; 3-norbornylamino-1,3-dinorbornyl-2-propenal; 2,2′-pyridil; alpha-pyridoin; 4-aminoantipyrine (aap); beta-phenylaminopropiophenone; and polyaminoquinones (PAQs).

N—O Valence Stabilizer #8: Examples of 3-aminoacrylamides (3-amino-2-propenamides), 3,3-diaminoacrylamides, bis(3-aminoacrylamides), bis(3,3-diaminoacrylamides), poly(3-aminoacrylamides), and poly(3,3-diaminoacrylamides) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-methylaminoacrylamide; 3-ethylaminoacrylamide, 3-isopropylaminoacrylamide, 3-phenylaminoacrylamide; 3-naphthylaminoacrylamide; 3-cyclohexylaminoacrylamide; 3-norbornylaminoacrylamide; 3-hydroxyaminoacrylamide; N-methyl-3-methylaminoacrylamide; N-ethyl-3-ethylaminoacrylamide, N-isopropyl-3-isopropylaminoacrylamide, N-phenyl-3-phenylaminoacrylamide; N-naphthyl-3-naphthylaminoacrylamide; N-cyclohexyl-3-cyclohexylaminoacrylamide; N-norbornyl-3-norbornylaminoacrylamide; 3-amino-3-methylaminoacrylamide; 3-amino-3-ethylaminoacrylamide, 3-amino-3-isopropylaminoacrylamide, 3-amino-3-phenylaminoacrylamide; 3-amino-3-naphthylaminoacrylamide; 3-amino-3-cyclohexylaminoacrylamide; 3-amino-3-norbornylaminoacrylamide; and 3-amino-3-hydroxyaminoacrylamide.

N—O Valence Stabilizer #9: Examples of 3-aminoacrylic acids (3-amino-2-propenoic acids), 3-hydroxy-3-aminoacrylic acids, bis(3-aminoacrylic acids), bis(3-hydroxy-3-aminoacrylic acids), poly(3-aminoacrylic acids), and poly(3-hydroxy-3-aminoacrylic acids), and derivatives thereof (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3-aminoacrylic acid; 3-hydroxy-3-aminoacrylic acid; 3-methylaminoacrylic acid; 3-ethylaminoacrylic acid; 3-isopropylaminoacrylic acid; 3-phenylaminoacrylic acid; 3-naphthylaminoacrylic acid; 3-cyclohexylaminoacrylic acid; 3-norbornylaminoacrylic acid; 3-hydroxyaminoacrylic acid; methyl 3-methylaminoacrylate; ethyl 3-ethylaminoacrylate; isopropyl 3-isopropylaminoacrylate; benzyl 3-phenylaminoacrylate; naphthyl 3-naphthylaminoacrylate; cyclohexyl 3-cyclohexylaminoacrylate; and norbornyl 3-norbornylaminoacrylate.

N—O Valence Stabilizer #10: Examples of N-acyl benzylidenimines, bis(N-acyl benzylidenimines), and poly(N-acyl benzylidenimines) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-formyl benzylidenimine, N-acetyl benzylidenimine; N-benzoyl benzylidenimine; and N-pentafluorobenzoyl benzylidenimine.

N—O Valence Stabilizer #11: Examples of 2-nitroanilines (N—O Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-nitroaniline; 2,6-dintroaniline; 2-nitrophenylenediamine; 2-nitrophenylenetriamine; 2-nitro-1-aminonaphthalene; 1-nitro-2-aminonaphthalene; nitrodiaminonaphthalene; and dipicrylamine.

N—O Valence Stabilizer #12: Examples of 2-nitrilophenols (N—O Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-cyanophenol; 2,3-dicyanophenol; 2,4-dicyanophenol; 2,5-dicyanophenol; 2,6-dicyanophenol; 1-cyano-2-naphthol; and 2-cyano-1-naphthol. Also includes acylcyanamides.

N—O Valence Stabilizer #13: Examples of amine N-oxides and N-diazine oxides (azoxy compounds) (N—O Bidentates, N—O Tridentates, and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: pyridine N-oxide (pyNO or PNO); picoline N-oxide (picNO); lutidine N-oxide (lutNO or LNO); collidine N-oxide (collNO or CNO); quinoline N-oxide (QuinNO or QNO); isoquinoline N-oxide (isoQuinNO or IQNO); acridine N-oxide (AcrNO or ANO); picolinic acid N-oxide (PicANO); pyridinethiolate N-oxide (PTNO); adenine N-oxide; adenosine N-oxide; 1,10-phenanthroline mono-N-oxide (phenNO); 1,10-phenanthroline N,N-dioxide (phen2NO); bipyridyl mono-N-oxide (bipyNO); bipyridyl N,N-dioxide (bipy2NO); pyrazine mono-N-oxide (pyzNO); pyrazine N,N-dioxide (pyz2NO); pyrimidine mono-N-oxide (pymNO); pyrimidine N,N-dioxide (pym2NO); pyridazine mono-N-oxide (pdzNO); pyridazine N,N-dioxide (pdz2NO); quinoxaline mono-N-oxide (qxNO); quinoxaline N,N-dioxide (qx2NO); phenazine mono-N-oxide (phzNO); phenazine N,N-dioxide (phz2NO); 2,3-di(pyridine N-oxide)quinoxaline (dpoq); inosine N-oxide; 4,4′-bipyridine N,N-dioxide; 1-hydroxypyrazole 2-oxide; 1-hydroxyimidazole 3-oxide; 2,2′-diimidazyl 3,3′-dioxide; imidazole N-oxides; 1-hydroxyimidazole-3-N-oxides; N-benzylidine aniline N-oxide; N-(naphthylidene) aniline N-oxide; N-(hydroxybenzylidene) aniline N-oxide; and 2,2′-dibenzimidazyl 3,3′-dioxide (indigo N,N-dioxide) for amine N-oxides; and azoxybenzene; phthalazine N-oxide; benzocinnoline N-oxide; and bipyrazinyl N-oxide as N-diazine oxide examples.

N—O Valence Stabilizer #14: Examples of hydrazides, bis(hydrazides), and poly(hydrazides) (N—O Bidentates and N—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: formic hydrazide; acetic hydrazide; propionic hydrazide; benzoic hydrazide; phthalhydrazide; salicylic hydrazide; naphthoic hydrazides; norbornaneacetic hydrazide; nicotinic hydrazide; and isonicotinic hydrazide (isoniazid). [Note: Hydrazides prefer complexation with lower oxidation states in metal ions.]

N—O Valence Stabilizer #15: Examples of semicarbazides, bis(semicarbazides), and poly(semicarbazides) (N—O Bidentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: semicarbazide (sc); semicarbazide diacetic acid (sda); 1-methylsemicarbazide; 1-ethylsemicarbazide; 1-isopropylsemicarbazide; 1-phenylsemicarbazide; 1-benzylsemicarbazide; 1-cyclohexylsemicarbazide; 1-norbornylsemicarbazide; 4-methylsemicarbazide; 4-ethylsemicarbazide; 4-isopropylsemicarbazide; 4-phenylsemicarbazide; 4-benzylsemicarbazide; 4-cyclohexylsemicarbazide; 4-norbornylsemicarbazide; nicotinic semicarbazide; and isonicotinic semicarbazide. [Note: Semicarbazides prefer complexation with lower oxidation states in metal ions.]

N—O Valence Stabilizer #16: Examples of five-, seven-, or nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) or oxygen (usually hydroxy, carboxy, or carbonyl groups) and are not contained in component heterocyclic rings (N—O Tridentates, N—O Tetradentates, and N—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triazadioxacyclodecane ([10]aneO2N3); triazadioxacycloundecane ([11]aneO2N3); triazadioxacyclododecane ([12]aneO2N3); triazadioxacyclotridecane ([13]aneO2N3); triazadioxacyclotetradecane ([14]aneO2N3); and triazadioxacyclopentadecane ([15]aneO2N3).

N—O Valence Stabilizer #17: Examples of five- or seven-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or oxygen and are contained in component heterocyclic rings (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dipyrantripyridines; difurantripyrroles; tripyrantetrapyridines; and trifurantetrapyrroles.

N—O Valence Stabilizer #18: Examples of five-, seven-, or nine-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or oxygen and are contained in a combination of heterocyclic rings and amine, imine, hydroxy, carboxy, or carbonyl groups (N—O Bidentates, N—O Tridentates, N—O Tetradentates, or N—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azaoxapentaphyrins; diazadioxapentaphyrins; azaoxapentaphyrins; and diazadioxapentaphyrins.

S—O Valence Stabilizer #1: Examples of thiobiurets (thioimidodicarbonic diamides), thioisobiurets, thiobiureas, thiotriurets, thiotriureas, bis(thiobiurets), bis(thioisobiurets), bis(thiobiureas), poly(thiobiurets), poly(thioisobiurets), poly(thiobiureas) (S—O Bidentates, S—O Tridentates, S—O Tetradentates), and (3-formamidino thiocarbamides) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiobiuret, thioisobiuret, thiobiurea, thiotriuret, thiotriurea, nitrothiobiuret, dinitrothiobiuret, aminothiobiuret, diaminothiobiuret, oxythiobiuret, dioxythiobiuret, cyanothiobiuret, methylthiobiuret, ethylthiobiuret, isopropylthiobiuret, phenylthiobiuret, benzylthiobiuret, cyclohexylthiobiuret, norbornylthiobiuret, adamantylthiobiuret, dimethylthiobiuret, diethylthiobiuret, diisopropylthiobiuret, diphenylthiobiuret, dibenzylthiobiuret, dicyclohexylthiobiuret, dinorbornylthiobiuret, and diadamantylthiobiuret.

S—O Valence Stabilizer #2: Examples of acylthioureas, aroylthioureas, thioacylureas, thioaroylureas, bis(acylthioureas), bis(aroylthioureas), bis(thioacylureas), bis(thioaroylureas), poly(thioacylthioureas), poly(thioaroylthioureas), poly(thioacylureas), and poly(thioaroylureas) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioformylurea, thioacetylurea, thiobenzoylurea, thiocyclohexoylurea, pentafluorothiobenzoylurea, acetylthiourea, benzoylthiourea, and cyclohexoylthiourea.

S—O Valence Stabilizer #3: Examples of thioimidodialdehydes, thiohydrazidodialdehydes (thioacyl hydrazides), bis(thioimidodialdehydes), bis(thiohydrazidodialdehydes), poly(thioimidodialdehydes), and poly(thiohydrazidodialdehydes) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiodiacetamide, thiodipropanamide, thiodibutanamide, thiodibenzamide, and thiodicyclohexamide.

S—O Valence Stabilizer #4: Examples of thioimidodicarbonic acids, thiohydrazidodicarbonic acids, bis(thioimidodicarbonic acids), bis(thiohydrazidodicarbonic acids), poly(thioimidodicarbonic acids), poly(thiohydrazidodicarbonic acids) and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioimidodicarbonic acid, thiohydrazidodicarbonic acid, O-phenylthioimidodicarbonic acid, O-benzylthioimidodicarbonic acid, O-cyclohexylthioimidodicarbonic acid, O-norbornylthioimidodicarbonic acid, O,O′-diphenylthioimidodicarbonic acid, O,O′-dibenzylthioimidodicarbonic acid, O,O′-dicyclohexylthioimidodicarbonic acid, O,O′-dinorbornylthioimidodicarbonic acid.

S—O Valence Stabilizer #5: Examples of 1,2-monothioketones (monothiolenes, monothio-alpha-ketonates), 1,2,3-monothioketones, 1,2,3-dithioketones, monothiotropolonates, ortho-monothioquinones, bis(1,2-monothioketones), and poly(1,2-monothioketones) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiotropolone; 1,2-monothiobenzoquinone (o-monothioquinone); di-tert-butyl-1,2-monothiobenzoquinone; hexafluoro-1,2-monothiobenzoquinone; 1,2-monothionaphthoquinone; 9,10-monothiophenanthroquinone; monothiosquaric acid; monothiodeltic acid; monothiocroconic acid; and monothiorhodizonic acid.

S—O Valence Stabilizer #6: Examples of trithioperoxydicarbonic diamides, bis(trithioperoxydicarbonic diamides), and poly(trithioperoxydicarbonic diamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithioperoxydicarbonic diamide; N-phenyltrithioperoxydicarbonic diamide; N-benzyltrithioperoxydicarbonic diamide; N-cyclohexyltrithioperoxydicarbonic diamide; N-norbornyltrithioperoxydicarbonic diamide; N,N′-diphenyltrithioperoxydicarbonic diamide; N,N′-dibenzyltrithioperoxydicarbonic diamide; N,N′-dicyclohexyltrithioperoxydicarbonic diamide; and N,N′-dinorbornyltrithioperoxydicarbonic diamide.

S—O Valence Stabilizer #7: Examples of dithiodicarbonic acids, bis(dithiodicarbonic acids), poly(dithiodicarbonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodicarbonic acid, O-phenyldithiodicarbonic acid, O-benzyldithiodicarbonic acid, O-cyclohexyldithiodicarbonic acid, O-norbornyldithiodicarbonic acid, O,O′-diphenyldithiodicarbonic acid, O,O′-dibenzyldithiodicarbonic acid, O,O′-dicyclohexyldithiodicarbonic acid, and O,O′-dinorbornyldithiodicarbonic acid.

S—O Valence Stabilizer #8: Examples of trithioperoxydicarbonic acids, bis(trithioperoxydicarbonic acids), poly(trithioperoxydicarbonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: trithioperoxydicarbonic acid, O-phenyltrithioperoxydicarbonic acid; O-benzyltrithioperoxydicarbonic acid; O-cyclohexyltrithioperoxydicarbonic acid; O-norbornyltrithioperoxydicarbonic acid; O,O′-diphenyltrithioperoxydicarbonic acid; O,O′-dibenzyltrithioperoxydicarbonic acid; O,O′-dicyclohexyltrithioperoxydicarbonic acid; and O,O′-dinorbornyltrithioperoxydicarbonic acid.

S—O Valence Stabilizer #9: Examples of monothioperoxydiphosphoramides, bis(monothioperoxydiphosphoramides), and poly(monothioperoxydiphosphoramides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioperoxydiphosphoramide, N-methylmonothioperoxydiphosphoramide, N-isopropylmonothioperoxydiphosphoramide, N-tert-butylmonothioperoxydiphosphoramide, N-phenylmonothioperoxydiphosphoramide, N-pentafluorophenylmonothioperoxydiphosphoramide, N-benzylmonothioperoxydiphosphoramide, N-cyclohexylmonothioperoxydiphosphoramide, N-norbornylmonothioperoxydiphosphoramide, N,N′′′-dimethylmonothioperoxydiphosphoramide, N,N′′′-diisopropylmonothioperoxydiphosphoramide, N,N′′′-di-tert-butylmonothioperoxydiphosphoramide, N,N′′′-diphenylmonothioperoxydiphosphoramide, N,N′′′-di-pentafluorophenylmonothioperoxydipho sphoramide, N,N′′′-dibenzylmonothioperoxydiphosphoramide, N,N′′′-dicyclohexylmonothioperoxydiphosphoramide, and N,N′′′-dinorbornylmonothioperoxydiphosphoramide.

S—O Valence Stabilizer #10: Examples of monothioperoxydiphosphoric acids, bis(monothioperoxydiphosphoric acids), poly(monothioperoxydiphosphoric acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioperoxydiphosphoric acid, methylmonothioperoxydiphosphoric acid, isopropylmonothioperoxydiphosphoric acid, tert-butylmonothioperoxydiphosphoric acid, phenylmonothioperoxydiphosphoric acid, pentafluorophenylmonothioperoxydiphosphoric acid, benzylmonothioperoxydiphosphoric acid, cyclohexylmonothioperoxydiphosphoric acid, norbornylmonothioperoxydiphosphoric acid, dimethylmonothioperoxydiphosphoric acid, diisopropylmonothioperoxydiphosphoric acid, di-tert-butylmonothioperoxydiphosphoric acid, diphenylmonothioperoxydiphosphoric acid, di-pentafluorophenylmonothioperoxydiphosphoric acid, dibenzylmonothioperoxydiphosphoric acid, dicyclohexylmonothioperoxydiphosphoric acid, and dinorbornylmonothioperoxydiphosphoric acid.

S—O Valence Stabilizer #11: Examples of monothioimidodiphosphonic acids, monothiohydrazidodiphosphonic acids, bis(monothioimidodiphosphonic acids), bis(monothiohydrazidodiphosphonic acids), poly(monothioimidodiphosphonic acids), poly(monothiohydrazidodiphosphonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioimidodiphosphonic acid, methylmonothioimidodiphosphonic acid, isopropylmonothioimidodiphosphonic acid, tert-butylmonothioimidodiphosphonic acid, phenylmonothioimidodiphosphonic acid, pentafluorophenylmonothioimidodiphosphonic acid, benzylmonothioimidodiphosphonic acid, cyclohexylmonothioimidodiphosphonic acid, norbornylmonothioimidodiphosphonic acid, dimethylmonothioimidodiphosphonic acid, diisopropylmonothioimidodiphosphonic acid, di-tert-butylmonothioimidodiphosphonic acid, diphenylmonothioimidodiphosphonic acid, di-pentafluorophenylmonothioimidodiphosphonic acid, dibenzylmonothioimidodiphosphonic acid, dicyclohexylmonothioimidodiphosphonic acid, and dinorbornylmonothioimidodiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #12: Examples of monothioimidodiphosphonamides, monothiohydrazidodiphosphonamides, bis(monothioimidodiphosphonamides), bis(monothiohydrazidodiphosphonamides), poly(monothioimidodiphosphonamides), and poly(monothiohydrazidodiphosphonamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioimidodiphosphonamide, N-methylmonothioimidodiphosphonamide, N-isopropylmonothioimidodiphosphonamide, N-tert-butylmonothioimidodiphosphonamide, N-phenylmonothioimidodiphosphonamide, N-pentafluorophenylmonothioimidodiphosphonamide, N-benzylmonothioimidodiphosphonamide, N-cyclohexylmonothioimidodiphosphonamide, N-norbornylmonothioimidodiphosphonamide, N,N′′′-dimethylmonothioimidodiphosphonamide, N,N′′′-diisopropylmonothioimidodiphosphonamide, N,N′′′-di-tert-butylmonothioimidodiphosphonamide, N,N′′′-diphenylmonothioimidodiphosphonamide, N,N′′′-di-pentafluorophenylmonothioimidodiphosphonamide, N,N′′′-dibenzylmonothioimidodiphosphonamide, N,N′′′-dicyclohexylmonothioimidodiphosphonamide, and N,N′′′-dinorbornylmonothioimidodiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #13: Examples of dithiodiphosphonamides, bis(dithiodiphosphonamides), and poly(dithiodiphosphonamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphonamide, N-methyldithiodiphosphonamide, N-isopropyldithiodiphosphonamide, N-tert-butyldithiodiphosphonamide, N-phenyldithiodiphosphonamide, N-pentafluorophenyldithiodiphosphonamide, N-benzyldithiodiphosphonamide, N-cyclohexyldithiodiphosphonamide, N-norbornyldithiodiphosphonamide, N,N′′′-dimethyldithiodiphosphonamide, N,N′′′-diisopropyldithiodiphosphonamide, N,N′′′-di-tert-butyldithiodiphosphonamide, N,N′′′-diphenyldithiodiphosphonamide, N,N′′′-di-pentafluorophenyldithiodiphosphonamide, N,N′′′-dibenzyldithiodiphosphonamide, N,N′′′-dicyclohexyldithiodiphosphonamide, and N,N′′′-dinorbornyldithiodiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #14: Examples of dithiodiphosphonic acids, bis(dithiodiphosphonic acids), poly(dithiodiphosphonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiodiphosphonic acid, methyldithiodiphosphonic acid, isopropyldithiodiphosphonic acid, tert-butyldithiodiphosphonic acid, phenyldithiodiphosphonic acid, pentafluorophenyldithiodiphosphonic acid, benzyldithiodiphosphonic acid, cyclohexyldithiodiphosphonic acid, norbornyldithiodiphosphonic acid, dimethyldithiodiphosphonic acid, diisopropyldiothiodiphosphonic acid, di-tert-butyldithiodiphosphonic acid, diphenyldithiodiphosphonic acid, di-pentafluorophenyldithiodiphosphonic acid, dibenzyldithiodiphosphonic acid, dicyclohexyldithiodiphosphonic acid, and dinorbornyldithiodiphosphoric acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #15: Examples of monothioperoxydiphosphonamides, bis(monothioperoxydiphosphonamides), and poly(monothioperoxydiphosphonamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioperoxydiphosphonamide, N-methylmonothioperoxydiphosphonamide, N-isopropylmonothioperoxydiphosphonamide, N-tert-butylmonothioperoxydiphosphonamide, N-phenylmonothioperoxydiphosphonamide, N-pentafluorophenylmonothioperoxydiphosphonamide, N-benzylmonothioperoxydiphosphonamide, N-cyclohexylmonothioperoxydiphosphonamide, N-norbornylmonothioperoxydiphosphonamide, N,N′′′-dimethylmonothioperoxydiphosphonamide, N,N′′′-diisopropylmonothioperoxydiphosphonamide, N,N′′′-di-tert-butylmonothioperoxydiphosphonamide, N,N′′′-diphenylmonothioperoxydiphosphonamide, N,N′′′-di-pentafluorophenylmonothioperoxydiphosphonamide, N,N′′′-dibenzylmonothioperoxydiphosphonamide, N,N′′′-dicyclohexylmonothioperoxydiphosphonamide, and N,N′′′-dinorbornylmonothioperoxydiphosphonamide. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #16: Examples of monothioperoxydiphosphonic acids, bis(monothioperoxydiphosphonic acids), poly(monothioperoxydiphosphonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioperoxydiphosphonic acid, methylmonothioperoxydiphosphonic acid, isopropylmonothioperoxydiphosphonic acid, tert-butylmonothioperoxydiphosphonic acid, phenylmonothioperoxydiphosphonic acid, pentafluorophenylmonothioperoxydiphosphonic acid, benzylmonothioperoxydiphosphonic acid, cyclohexylmonothioperoxydiphosphonic acid, norbornylmonothioperoxydiphosphonic acid, dimethylmonothioperoxydiphosphonic acid, diisopropylmonothioperoxydiphosphonic acid, di-tert-butylmonothioperoxydiphosphonic acid, diphenylmonothioperoxydiphosphonic acid, di-pentafluorophenylmonothioperoxydiphosphonic acid, dibenzylmonothioperoxydiphosphonic acid, dicyclohexylmonothioperoxydiphosphonic acid, and dinorbornylmonothioperoxydiphosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #17: Examples of monothiophosphoric acids (phosphorothioic acids), bis(monothiophosphoric acids), poly(monothiophosphoric acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiophosphoric acid, O-phenylmonothiophosphoric acid, O-benzylmonothiophosphoric acid, O-cyclohexylmonothiophosphoric acid, O-norbornylmonothiophosphoric acid, O,O-diphenylmonothiophosphoric acid, O,O-dibenzylmonothiophosphoric acid, O,O-dicyclohexylmonothiophosphoric acid, and O,O-dinorbornylmonothiophosphoric acid.

S—O Valence Stabilizer #18: Examples of phosphoro(dithioperoxoic) acids, bis[phosphoro(dithioperoxoic) acids], poly[phosphoro(dithioperoxoic) acids], and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphoro(dithioperoxoic) acid, O-phenylphosphoro(dithioperoxoic) acid, O-benzylphosphoro(dithioperoxoic) acid, O-cyclohexylphosphoro(dithioperoxoic) acid, O-norbornylphosphoro(dithioperoxoic) acid, O,O-diphenylphosphoro(dithioperoxoic) acid, O,O-dibenzylphosphoro(dithioperoxoic) acid, O,O-dicyclohexylphosphoro(dithioperoxoic) acid, and O,O-dinorbornylphosphoro(dithioperoxoic) acid.

S—O Valence Stabilizer #19: Examples of monothiophosphonic Acids (phosphonothioic acids), bis(monothiophosphonic acids), poly(monothiophosphonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiophosphonic acid, O-phenylmonothiophosphonic acid, O-benzylmonothiophosphonic acid, O-cyclohexylmonothiophosphonic acid, O-norbornylmonothiophosphonic acid, O,P-diphenylmonothiophosphonic acid, O,P-dibenzylmonothiophosphonic acid, O,P-dicyclohexylmonothiophosphonic acid, and O,P-dinorbornylmonothiophosphonic acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #20: Examples of phosphono(dithioperoxoic) acids, bis[phosphono(dithioperoxoic) acids], poly[phosphono(dithioperoxoic) acids], and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphono(dithioperoxoic) acid, O-phenylphosphono(dithioperoxoic) acid, O-benzylphosphono(dithioperoxoic) acid, O-cyclohexylphosphono(dithioperoxoic) acid, O-norbornylphosphono(dithioperoxoic) acid, O,P-diphenylphosphono(dithioperoxoic) acid, O,P-dibenzylphosphono(dithioperoxoic) acid, O,P-dicyclohexylphosphono(dithioperoxoic) acid, and O,P-dinorbornylphosphono(dithioperoxoic) acid. [Note: The phosphite (P+3) valence of the phosphorus atom makes stabilizization of high valence metal ions much more difficult, though still possible.]

S—O Valence Stabilizer #21: Examples of beta-hydroxythioketones, beta-hydroxythioaldehydes, bis(beta-hydroxythioketones), bis(beta-hydroxythioaldehydes), poly(beta-hydroxythioketones), and poly(beta-hydroxythioaldehydes) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-hydroxypentan-2-thione; 1,3-diphenyl-3-hydroxypropanethioaldehyde; 1,3-dibenzyl-3-hydroxypropanethioaldehyde; 1,3-dicyclohexyl-3-hydroxypropanethioaldehyde; 1,3-dinorbornyl-3-hydroxypropanethioaldehyde; 1,3-di(2-thienyl)-3-hydroxypropanethioaldehyde; 1,3-di(2-furyl)-3-hydroxypropanethioaldehyde; o-hydroxythioacetophenone; and beta-hydroxythiobenzophenone.

S—O Valence Stabilizer #22: Examples of beta-mercaptoketones, beta-mercaptoaldehydes, bis(beta-mercaptoketones), bis(beta-mercaptoaldehydes), poly(beta-mercaptoketones), and poly(beta-mercaptoaldehydes) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-mercaptopentan-2-one; 1,3-diphenyl-3-mercaptopropanal; 1,3-dibenzyl-3-mercaptopropanal; 1,3-dicyclohexyl-3-mercaptopropanal; 1,3-dinorbornyl-3-mercaptopropanal; 1,3-di(2-thienyl)-3-mercaptopropanal; 1,3-di(2-furyl)-3-mercaptopropanal; 3-mercapto-1,5-pentanedialdehyde; o-mercaptoacetophenone; 5-mercapto-1,4-naphthoquinone; 1-mercaptoacridone; 1-mercaptoanthraquinone; 1,8-dimercaptoanthraquinone; and beta-mercaptobenzophenone.

S—O Valence Stabilizer #23: Examples of N-(aminomethylol)thioureas[N-(aminohydroxymethyl)thioureas], bis[N-(aminomethylol)thioureas], and poly[N-(aminomethylol)thioureas] (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N′-(aminohydroxymethyl)thiourea; N,N′′-dimethyl-N′(aminohydroxymethyl)thiourea; N,N′-diethyl-N′-(aminohydroxymethyl)thiourea; N,N′′-isopropyl-N′-(aminohydroxymethyl)thiourea; N,N′′-diphenyl-N′-(aminohydroxymethyl)thiourea; N,N′′-dibenzyl-N′-(aminohydroxymethyl)thiourea; N,N′′-dicyclohexyl-N′-(aminohydroxymethyl)thiourea; and N,N′′-dinorbornyl-N′-(aminohydroxymethyl)thiourea.

S—O Valence Stabilizer #24: Examples of N-(aminomethylthiol)ureas[N-(aminomercaptomethyl)ureas], bis[N-(aminomethylthiol)ureas], and poly[N-(aminomethylthiol)ureas] (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N′-(aminomercaptomethyl)urea; N,N′′-dimethyl-N′-(aminomercaptomethyl)urea; N,N′-diethyl-N′-(aminomercaptomethyl)urea; N,N′′-isopropyl-N′-(aminomercaptomethyl)urea; N,N′′-diphenyl-N′-(aminomercaptomethyl)urea; N,N′′-dibenzyl-N′-(aminomercaptomethyl)urea; N,N′′-dicyclohexyl-N′-(aminomercaptomethyl)urea; and N,N′′-dinorbornyl-N′-(aminomercaptomethyl)urea.

S—O Valence Stabilizer #25: Examples of monothiooxamides, bis(monothiooxamides), and poly(monothiooxamides) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothiooxamide, N-methylthiooxamide; N-ethylthiooxamide; N-isopropylthiooxamide; N-phenylthiooxamide; N-benzylthiooxamide; N-cyclohexylthiooxamide; N-norbornylthiooxamide; N,N′-dimethylthiooxamide; N,N′-diethylthiooxamide; N,N′-diisopropylthiooxamide; N,N′-diphenylthiooxamide; N,N′-dibenzylthiooxamide; N,N′-dicyclohexylthiooxamide; and N,N′-dinorbornylthiooxamide.

S—O Valence Stabilizer #26: Examples of beta-mercapto carboxylic acids, bis(beta-mercapto carboxylic acids), poly(beta-mercapto carboxylic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl 3-mercaptopropanoate; methyl 3-mercaptobutanoate; ethyl 3-mercaptobutanoate; phenyl 3-mercaptobutanoate; cyclohexyl 3-mercaptobutanoate; norbornyl 3-mercaptobutanoate; methyl beta-mercaptohydrocinnamate; ethyl beta-mercaptohydrocinnamate; phenyl beta-mercaptohydrocinnamate; methyl o-mercaptobenzoate; ethyl o-mercaptobenzoate; phenyl o-mercaptobenzoate; cyclohexyl o-mercaptobenzoate; (2-benzothiazolylthio) succinic acid (mtbs); norbornyl o-mercaptobenzoate; and 3-[(benzothiazol-2-yl)thio]propionic acid.

S—O Valence Stabilizer #27: Examples of beta-mercapto thiocarboxylic acids, bis(beta-mercapto thiocarboxylic acids), poly(beta-mercapto thiocarboxylic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl 3-mercaptothiobutanoate; ethyl 3-mercaptothiobutanoate; phenyl 3-mercaptothiobutanoate; cyclohexyl 3-mercaptothiobutanoate; norbornyl 3-mercaptothiobutanoate; methyl beta-mercaptothiocinnamate; ethyl beta-mercaptothiocinnamate; phenyl beta-mercaptothiocinnamate; methyl o-mercaptothiobenzoate; ethyl o-mercaptothiobenzoate; phenyl o-mercaptothiobenzoate; cyclohexyl o-mercaptothiobenzoate; norbornyl o-mercaptothiobenzoate; and (alkylthio)oxoethyl alkyl(aryl) disulfides.

S—O Valence Stabilizer #28: Examples of beta-hydroxy thiocarboxylic acids, bis(beta-hydroxy thiocarboxylic acids), poly(beta-hydroxy thiocarboxylic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methyl 3-hydroxythiobutanoate; ethyl 3-hydroxythiobutanoate; phenyl 3-hydroxythiobutanoate; cyclohexyl 3-hydroxythiobutanoate; norbornyl 3-hydroxythiobutanoate; methyl beta-hydroxythiocinnamate; ethyl beta-hydroxythiocinnamate; phenyl beta-hydroxythiocinnamate; methyl o-hydroxythiobenzoate; ethyl o-hydroxythiobenzoate; phenyl o-hydroxythiobenzoate; cyclohexyl o-hydroxythiobenzoate; and norbornyl o-hydroxythiobenzoate.

S—O Valence Stabilizer #29: Examples of beta-mercapto carboxamides, bis(beta-mercapto carboxamides), poly(beta-mercapto carboxamides), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N-methyl 3-mercaptobutanamide; N-ethyl 3-mercaptobutanamide; N-phenyl 3-mercaptobutanamide; N-cyclohexyl 3-mercaptobutanamide; N-norbornyl 3-mercaptobutanamide; N-methyl o-mercaptobenzamide; N-ethyl o-mercaptobenzamide; N-phenyl o-mercaptobenzamide; N-cyclohexyl o-mercaptobenzamide; and N-norbornyl o-mercaptobenzamide.

S—O Valence Stabilizer #30: Examples of S-alkylthiocarboxylic Acids, S-arylthiocarboxylic Acids, and S,S-thiobiscarboxylic Acids (S—O Bidentates and S—O Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: (methylthio)acetic acid; (methylthio)benzoic acid; (methylthio)nicotinic acid; (methylthio)napthoic acid; (phenylthio)acetic acid; (phenylthio)benzoic acid; (phenylthio)naphthoic acid; (norbornylthio)acetic acid; (norbornylthio)benzoic acid; (norbornylthio)napthoic acid; thiobisacetic acid; thiobisbenzoic acid; and thiobisnapthoic acid.

S—O Valence Stabilizer #31: Examples of S-alkyldisulfidocarboxylic acids, S-aryldisulfidocarboxylic acids, and S,S′-disulfidobiscarboxylic acids (S—O Bidentates and S—O Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: (methyldisulfido)acetic acid; (methyldisulfido)benzoic acid; (methyldisulfido)nicotinic acid; (methyldisulfido)napthoic acid; (phenyldisulfido)acetic acid; (phenyldisulfido)benzoic acid; (phenyldisulfido)naphthoic acid; (norbornyldisulfido)acetic acid; (norbornyldisulfido)benzoic acid; (norbornyldisulfido)napthoic acid; S,S′-disulfidobisacetic acid; S,S′-disulfidobisbenzoic acid; and S,S′-disulfidobisnapthoic acid.

S—O Valence Stabilizer #32: Examples of monothiomonocarboxylic acids, dithiodicarboxylic acids, bis(monothiomonocarboxylic acids), bis(dithiodicarboxylic acids), poly(monothiomonocarboxylic acids), poly(dithiodicarboxylic acids), and derivatives thereof (S—O Bidentates and S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thioacetic acid; thiopropionic acid; thiobenzoic acid; thiophenylacetic acid; thiocyclohexanoic acid; thiofuroic acid; thionaphthoic acid; phenyl thioacetate; phenyl thiopropionate; phenyl thiobenzoate; phenyl thiocyclohexanoate; phenyl thiofuroate; phenyl thionaphthoate; dithiooxalic acid (dto); monothiooxalic acid (mtox); dithiomalonic acid; dithiosuccinic acid; diphenyl dithiooxalate; diphenyl dithiomalonate; and diphenyl dithiosuccinate.

S—O Valence Stabilizer #33: Examples of monothiocarbonates and bis(monothiocarbonates) (S—O Bidentates and S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: S,O-diethyldithiocarbonate; S,O-diisopropyldithiocarbonate; S,O-diphenyldithiocarbonate; S,O-dibenzyldithiocarbonate; S,O-dicyclohexyldithiocarbonate; and S,O-dinorbornyldithiocarbonate.

S—O Valence Stabilizer #34: Examples of monothiocarbazates (monothiocarbazides), bis(monothiocarbazates), and poly(monothiocarbazates) (S—O Bidentates, S—O Tridentates, and S—O Tetradentates; or possibly N—S Bidentates, N—S Tridentates, and N—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: N,N′-dimethylmonothiocarbazate; N,N′-di(trifluoromethyl)monothiocarbazate; N,N′-diethylmonothiocarbazate; N,N′-diphenylmonothiocarbazate; N,N′-dibenzylmonothiocarbazate; N,N′-di(pentafluorophenyl)monothiocarbazate; N,N′-dicyclohexylmonothiocarbazate; and N,N′-dinorbornylmonothiocarbazate.

S—O Valence Stabilizer #35: Examples of mercapto alcohols and silylmercaptoalcohols, bis(mercapto alcohols and silylmercaptoalcohols), and poly(mercapto alcohols and silylmercaptoalcohols) (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercaptoethanol (mel); 3-mercaptopropanol (mpl); 2-mercaptophenol; 2-mercaptocyclohexanol; 3-mercapto-2-norborneol; 2-mercaptopyridine 1-oxide; 1,4-thioxane; thiodialkanols; 2-(trimethoxysilyl)-1-ethanethiol (tmset); 3-(trimethoxysilyl)-1-propanethiol (tmspt); o-hydroxythiophenols; o-(O-hydroxyalkyl(aryl))thiophenols; and o-(S-thioalkyl(aryl))phenols.

S—O Valence Stabilizer #36: Examples of monothiocarbimates, bis(monothiocarbimates), and poly(monothiocarbimates) (S—O Bidentates, S—O Tridentates, and S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: methylmonothiocarbimate; trifluoromethylmonothiocarbimate; ethylmonothiocarbimate; propylmonothiocarbimate; isopropylmonothiocarbimate; butylmonothiocarbimate; tertbutylmonothiocarbimate; cyanomonothiocarbimate; cyanamidomonothiocarbimate; azidomonothiocarbimate; phenylmonothiocarbimate; pentafluorophenylmonothiocarbimate; benzylmonothiocarbimate; naphthylmonothiocarbimate; cyclohexylmonothiocarbimate; norbornylmonothiocarbimate; and adamantylmonothiocarbimate. [Note: Carbimates tend to stabilize lower oxidation states in metal ions.]

S—O Valence Stabilizer #37: Examples of alkyl- and aryl-monothioborates and bis(monothioborates) (S—O Bidentates and S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: O,O′-diethyl monothioborate; O,O′-diisopropyl monothioborate; O,O′-diphenyl monothioborate; O,O′-dibenzyl monothioborate; O,O′-dicyclohexyl monothioborate; and O,O′-dinorbornyl monothioborate.

S—O Valence Stabilizer #38: Examples of alkyl- and aryl-monothioboronates and bis(monothioboronates) (S—O Bidentates and S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diethyl monothioboronate; diisopropyl monothioboronate; diphenyl monothioboronate; dibenzyl monothioboronate; dicyclohexyl monothioboronate; and dinorbornyl monothioboronate. [Note: boronates tend to stabilize lower oxidation states in metal ions.]

S—O Valence Stabilizer #39: Examples of monothioarsonic acids (arsonothioic acids), bis(monothioarsonic acids), poly(monothioarsonic acids), and derivatives thereof (S—O Bidentates, S—O Tridentates, S—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: monothioarsonic acid, O-phenylmonothioarsonic acid, O-benzylmonothioarsonic acid, O-cyclohexylmonothioarsonic acid, O-norbornylmonothioarsonic acid, O,O-diphenylmonothioarsonic acid, O,O-dibenzylmonothioarsonic acid, O,O-dicyclohexylmonothioarsonic acid, and O,O-dinorbornylmonothioarsonic acid.

S—O Valence Stabilizer #40: Examples of heterocyclic rings containing one or two sulfur atoms and having at least one additional oxygen atom binding site not in a ring (S—O Bidentates, S—O Tridentates, S—O Tetradentates, or S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-thiopheneethanol (2-(2-thienyl)ethanol); 2-propionylthiophene (1-(2-thienyl)-1-propanone); N,N′-thiobisphthalimide; 1,1′-thiocarbonyldi-2-pyridone; 2-thiopheneacetic acid; 2-thiophenecarboxaldehyde; 2-thiophenecarboxamide; 2-thiophenecarboxylic acid; 2,5-thiophenedicarboxaldehyde; 2,5-thiophenedicarboxylic acid; 2-thiophenemethanol; 2-thiophenone; thiotetronic acid; alkyl(aryl) 2-thienyl ketones; dithienyl ketone; 1,3-dithiane-2-carboxylic acid; and 1,3-dithiolane-2-carboxylic acid.

S—O Valence Stabilizer #41: Examples of heterocyclic rings containing one or two oxygen atoms and having at least one additional sulfur atom binding site not in a ring (S—O Bidentates, S—O Tridentates, S—O Tetradentates, or S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-furanethanethiol (2-(2-furyl)ethanethiol); 1-(2-furyl)-1-propanethione); 2-furanthioacetic acid; 2-furanthiocarboxaldehyde; 2-furanthiocarboxamide; 2-furanthiocarboxylic acid; 2,5-furandithiocarboxaldehyde; 2,5-furandithiocarboxylic acid; 2-furanmethanethiol; 2-furanthione; furfuryl disulfide; furfuryl mercaptan; furfuryl sulfide; and furfuryl methyl disulfide.

S—O Valence Stabilizer #42: Examples of heterocyclic rings containing one or two sulfur atoms and having at least one additional oxygen atom binding site in a separate ring (S—O Bidentates, S—O Tridentates, S—O Tetradentates, or S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-furyl)thiophene; 2,5-(2-furyl)thiophene; 2-(2-furyl)thiopyran; and 2,5-(2-furyl)thiopyran.

S—O Valence Stabilizer #43: Examples of two-, three-, four-, five-, six-, seven-, eight-, nine-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol, mercapto, or thiocarbonyl groups) or oxygen (hydroxy, carboxy, or carbonyl groups) and are not contained in component heterocyclic rings (S—O Bidentates, S—O Tridentates, S—O Tetradentates, and S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiaoxacyclobutane ([4]aneOS); thiaoxacyclopentane ([5]aneOS); thiaoxacyclohexane ([6]aneOS); thiaoxacycloheptane ([7]aneOS); thiaoxacyclooctane ([8]aneOS); thiaoxacyclobutene ([4]eneOS); thiaoxacyclopentene ([5]eneOS); thiaoxacyclohexene ([6]eneOS); thiaoxacycloheptene ([7]eneOS); thiaoxacyclooctene ([8]eneOS); dithiaoxacyclohexane ([6]aneOS2); dithiaoxacycloheptane ([7]aneOS2); dithiaoxacyclooctane ([8]aneOS2); dithiaoxacyclononane ([9]aneOS2); dithiaoxacyclodecane ([10]aneOS2); dithiaoxacycloundecane ([11]aneOS2); dithiaoxacyclododecane ([12]aneOS2); dithiaoxacyclohexene ([6]eneOS2); dithiaoxacycloheptene ([7]eneOS2); dithiaoxacyclooctene ([8]eneOS2); dithiaoxacyclononene ([9]eneOS2); dithiaoxacyclodecene ([10]eneOS2); dithiaoxacycloundecene ([11]eneOS2); dithiaoxacyclododecene ([12]eneOS2); dithiadioxacyclooctane ([8]aneO2S2); dithiadioxacyclononane ([9]aneO2S2); dithiadioxacyclodecane ([10]aneO2S2); dithiadioxacycloundecane ([11]aneO2S2); dithiadioxacyclododecane ([12]aneO2S2); dithiadioxacyclotridecane ([13]aneO2S2); dithiadioxacyclotetradecane ([14]aneO2S2); dithiadioxacyclopentadecane ([15]aneO2S2); dithiadioxacyclohexadecane ([16]aneO2S2); dithiadioxacycloheptadecane ([17]aneO2S2); dithiadioxacyclooctadecane ([18]aneO2S2); dithiadioxacyclononadecane ([19]aneO2S2); dithiadioxacycloeicosane ([20]aneO2S2); dithiadioxacyclooctadiene ([8]dieneO2S2); dithiadioxacyclononadiene ([9]dieneO2S2); dithiadioxacyclodecadiene ([10]dieneO2S2); dithiadioxacycloundecadiene ([11]dieneO2S2); dithiadioxacyclododecadiene ([12]dieneO2S2); dithiadioxacyclotridecadiene ([13]dieneO2S2); dithiadioxacyclotetradecadiene ([14]dieneO2S2); dithiadioxacyclopentadecadiene ([15]dieneO2S2); dithiadioxacyclohexadecadiene ([16]dieneO2S2); dithiadioxacycloheptadecadiene ([17]dieneO2S2); dithiadioxacyclooctadecadiene ([18]dieneO2S2); dithiadioxacyclononadecadiene ([19]dieneO2S2); and dithiadioxacycloeicosadiene ([20]dieneO2S2).

S—O Valence Stabilizer #44: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur or oxygen and are contained in component heterocyclic rings (S—O Tridentates, S—O Tetradentates, or S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: difurandithiophenes; difurantrithiophenes; trifurantrithiophenes; and tetrafurantetrathiophenes.

S—O Valence Stabilizer #45: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur or oxygen and are contained in a combination of heterocyclic rings and thiol, mercapto, thiocarbonyl, hydroxy, carboxy, and carbonyl groups (S—O Tridentates, S—O Tetradentates, or S—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dithiadifurandithiophenes; tetrathiadifurandithiophenes; trithiatrifurantrithiophenes; trithiatrifurantrithiophenes; tetrathiatetrafurantetrathiophenes; and octathiatetrafurantetrathiophenes.

S—O Valence Stabilizer #46: Examples of sulfoxides that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethylsulfoxide (DMSO); diethylsulfoxide; diphenylsulfoxide; and tetrahydrothiophene oxide.

S—O Valence Stabilizer #47: Examples of sulfones that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethyl sulfone; diethyl sulfone; and diphenyl sulfone.

S—O Valence Stabilizer #48: Examples of sulfur dioxide ligands that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: sulfur dioxide (—SO2) ligands. [Note: Sulfur dioxide is a reducing agent, and complexed metal ions therefore tend to prefer lower oxidation states.]

N—P Valence Stabilizer #1: Examples of aminoaryl phosphines and iminoaryl phosphines (N—P Bidentates, N—P Tridentates, and N—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-aminophenyl)phosphine; tri(2-aminophenyl)phosphine oxide; and tri(2-aminophenyl)phosphine sulfide.

N—P Valence Stabilizer #2: Examples of heterocyclic rings containing one, two, three, or four nitrogen atoms and having at least one additional phosphorus atom binding site not in a ring (N—P Bidentates, N—P Tridentates, N—P Tetradentates, or N—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-imidazolyl)phosphine; tri(2-pyrrolyl)phosphine; tri(2-pyridyl)phosphine; tri(2-imidazolyl)phosphine oxide; tri(2-pyrrolyl)phosphine oxide; tri(2-pyridyl)phosphine oxide; tri(2-imidazolyl)phosphine sulfide; tri(2-pyrrolyl)phosphine sulfide; and tri(2-pyridyl)phosphine sulfide.

N—P Valence Stabilizer #3: Examples of heterocyclic rings containing one, two, or three phosphorus atoms and having at least one additional nitrogen atom binding site not in a ring (N—P Bidentates, N—P Tridentates, N—P Tetradentates, or N—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-aminophosphole; 2,5-diaminophosphole; 2-(aminomethyl)phosphole; 2,5-di(aminomethyl)phosphole; 2-aminophosphorin; 2,6-diaminophosphorin; 2-(aminomethyl)phosphorin; 2,6-di(aminomethyl)phosphorin; triaminocyclotriphosphazenes; and hexaminocyclotriphosphazenes.

N—P Valence Stabilizer #4: Examples of heterocyclic rings containing one, two, three, or four nitrogen atoms and having at least one additional phosphorus atom binding site in a separate ring (N—P Bidentates, N—P Tridentates, N—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-pyrrolyl)phosphole; 2,5-di(2-pyrrolyl)phosphole; 2-(2-pyridyl)phosphorin; and 2,6-(2-pyridyl)phosphorin.

N—P Valence Stabilizer #5: Examples of two-, three-, four-, five-, six-, seven-, eight-, nine-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen (usually amine or imine groups) or phosphorus and are not contained in component heterocyclic rings (N—P Bidentates, N—P Tridentates, N—P Tetradentates, and N—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclobiphosphazenes; cyclotriphosphazenes; cyclotetraphosphazenes; cyclopentaphosphazenes; cyclohexaphosphazenes; diphosphatetraazacyclooctatetraenes; diphospha-s-triazines; and phospha-s-triazines.

N—P Valence Stabilizer #6: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or phosphorus and are contained in component heterocyclic rings (N—P Bidentates, N—P Tridentates, N—P Tetradentates, or N—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphospholedipyrroles; diphosphorindipyridines; triphospholetripyrroles; triphosphorintripyridines; tetraphospholetetrapyrroles; and tetraphosphorintetrapyridines.

N—P Valence Stabilizer #7: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of nitrogen or phosphorus and are contained in a combination of heterocyclic rings and amine, imine, and phosphine groups (N—P Bidentates, N—P Tridentates, N—P Tetradentates, or N—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: azaphosphatetraphyrins; diazadiphosphatetraphyrins; azaphosphahexaphyrins; diazadiphosphahexaphyrins; triazatriphosphahexaphyrins; and apholate.

S—P Valence Stabilizer #1: Examples of thioaryl phosphines (S—P Bidentates, S—P Tridentates, S—P Tetradentates, and S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-mercaptophenyl)phosphine; tri(2-mercaptophenyl)phosphine oxide; and tri(2-mercaptophenyl)phosphine sulfide.

S—P Valence Stabilizer #2: Examples of heterocyclic rings containing one or two sulfur atoms and having at least one additional phosphorus atom binding site not in a ring (S—P Bidentates, S—P Tridentates, S—P Tetradentates, or S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-thiophene)phosphine; tri(2-thiopyran)phosphine; tri(2-thiophene)phosphine oxide; tri(2-thiopyran)phosphine oxide; tri(2-thiophene)phosphine sulfide; and tri(2-thiopyran)phosphine sulfide.

S—P Valence Stabilizer #3: Examples of heterocyclic rings containing one, two, or three phosphorus atoms and having at least one additional sulfur atom binding site not in a ring (S—P Bidentates, S—P Tridentates, S—P Tetradentates, or S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-mercaptophosphole; 2,5-dimercaptophosphole; 2-(mercaptomethyl)phosphole; 2,5-di(mercaptomethyl)phosphole; 2-mercaptophosphorin; 2,6-dimercaptophosphorin; 2-(mercaptomethyl)phosphorin; and 2,6-di(mercaptomethyl)phosphorin.

S—P Valence Stabilizer #4: Examples of heterocyclic rings containing one or two sulfur atoms and having at least one additional phosphorus atom binding site in a separate ring (S—P Bidentates, S—P Tridentates, S—P Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-thienyl)phosphole; 2,5-di(2-thienyl)phosphole; 2-(2-thienyl)phosphorin; and 2,6-(2-thienyl)phosphorin.

S—P Valence Stabilizer #5: Examples of two-, three-, four-, five-, six-, seven-, eight-, nine-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur (usually thiol, mercapto, or thiocarbonyl groups) or phosphorus and are not contained in component heterocyclic rings (S—P Bidentates, S—P Tridentates, S—P Tetradentates, and S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphathiacyclobutane ([4]anePS); phosphathiacyclopentane ([5]anePS); phosphathiacyclohexane ([6]anePS); phosphathiacycloheptane ([7]anePS); phosphathiacyclooctane ([8]anePS); diphosphathiacyclohexane ([6]aneSP2); diphosphathiacycloheptane ([7]aneSP2); diphosphathiacyclooctane ([8]aneSP2); diphosphathiacyclononane ([9]aneSP2); diphosphathiacyclodecane ([10]aneSP2); diphosphathiacycloundecane ([11]aneSP2); diphosphathiacyclododecane ([12]aneSP2); diphosphadithiacyclooctane ([8]aneS2P2); diphosphadithiacyclononane ([9]aneS2P2); diphosphadithiacyclodecane ([10]aneS2P2); diphosphadithiacycloundecane ([11]aneS2P2); diphosphadithiacyclododecane ([12]aneS2P2); diphosphadithiacyclotridecane ([13]aneS2P2); diphosphadithiacyclotetradecane ([14]aneS2P2); diphosphadithiacyclopentadecane ([15]aneS2P2); diphosphadithiacyclohexadecane ([16]aneS2P2); diphosphadithiacycloheptadecane ([17]aneS2P2); diphosphadithiacyclooctadecane ([18]aneS2P2); diphosphadithiacyclononadecane ([19]aneS2P2); diphosphadithiacycloeicosane ([20]aneS2P2).

S—P Valence Stabilizer #6: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur or phosphorus and are contained in component heterocyclic rings (S—P Bidentates, S—P Tridentates, S—P Tetradentates, or S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphospholedithiophenes; diphosphorindithiopyrans; triphospholetrithiophenes; triphosphorintrithiopyrans; tetraphospholetetrathiophenes; and tetraphosphorintetrathiopyrans.

S—P Valence Stabilizer #7: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of sulfur or phosphorus and are contained in a combination of heterocyclic rings and thiol, mercapto, thiocarbonyl, and phosphine groups (S—P Bidentates, S—P Tridentates, S—P Tetradentates, or S—P Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: thiaphosphatetraphyrins; dithiadiphosphatetraphyrins; thiaphosphahexaphyrins; dithiadiphosphahexaphyrins; and trithiatriphosphahexaphyrins.

P—O Valence Stabilizer #1: Examples of hydroxyaryl phosphines (P—O Bidentates, P—O Tridentates, P—O Tetradentates, and P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-hydroxyphenyl)phosphine; tri(2-hydroxyphenyl)phosphine oxide; and tri(2-hydroxyphenyl)phosphine sulfide.

P—O Valence Stabilizer #2: Examples of heterocyclic rings containing one or two oxygen atoms and having at least one additional phosphorus atom binding site not in a ring (P—O Bidentates, P—O Tridentates, P—O Tetradentates, or P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tri(2-furan)phosphine; tri(2-pyran)phosphine; tri(2-furan)phosphine oxide; tri(2-pyran)phosphine oxide; tri(2-furan)phosphine sulfide; and tri(2-pyran)phosphine sulfide.

P—O Valence Stabilizer #3: Examples of heterocyclic rings containing one, two, or three phosphorus atoms and having at least one additional oxygen atom binding site not in a ring (P—O Bidentates, P—O Tridentates, P—O Tetradentates, or P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-hydroxyphosphole; 2,5-dihydroxyphosphole; 2-(hydroxymethyl)phosphole; 2,5-di(hydroxymethyl)phosphole; 2-hydroxyphosphorin; 2,6-dihydroxyphosphorin; 2-(hydroxymethyl)phosphorin; and 2,6-di(hydroxymethyl)phosphorin.

P—O Valence Stabilizer #4: Examples of heterocyclic rings containing one or two oxygen atoms and having at least one additional phosphorus atom binding site in a separate ring (P—O Bidentates, P—O Tridentates, P—O Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(2-furyl)phosphole; 2,5-di(2-furyl)phosphole; 2-(2-furyl)phosphorin; and 2,6-(2-furyl)phosphorin.

P—O Valence Stabilizer #5: Examples of two-, three-, four-, five-, six-, seven-, eight-, nine-, and ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen (usually hydroxy, carboxy, or carbonyl groups) or phosphorus and are not contained in component heterocyclic rings (P—O Bidentates, P—O Tridentates, P—O Tetradentates, and P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: phosphaoxacyclobutane ([4]anePO); phosphaoxacyclopentane ([5]anePO); phosphaoxacyclohexane ([6]anePO); phosphaoxacycloheptane ([7]anePO); phosphaoxacyclooctane ([8]anePO); diphosphaoxacyclohexane ([6]aneOP2); diphosphaoxacycloheptane ([7]aneOP2); diphosphaoxacyclooctane ([8]aneOP2); diphosphaoxacyclononane ([9]aneOP2); diphosphaoxacyclodecane ([10]aneOP2); diphosphaoxacycloundecane ([11]aneOP2); diphosphaoxacyclododecane ([12]aneOP2); diphosphadioxacyclooctane ([8]aneO2P2); diphosphadioxacyclononane ([9]aneO2P2); diphosphadioxacyclodecane ([10]aneO2P2); diphosphadioxacycloundecane ([11]aneO2P2); diphosphadioxacyclododecane ([12]aneO2P2); diphosphadioxacyclotridecane ([13]aneO2P2); diphosphadioxacyclotetradecane ([14]aneO2P2); diphosphadioxacyclopentadecane ([15]aneO2P2); diphosphadioxacyclohexadecane ([16]aneO2P2); diphosphadioxacycloheptadecane ([17]aneO2P2); diphosphadioxacyclooctadecane ([18]aneO2P2); diphosphadioxacyclononadecane ([19]aneO2P2); diphosphadioxacycloeicosane ([20]aneO2P2); and dioxaphospholane.

P—O Valence Stabilizer #6: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen or phosphorus and are contained in component heterocyclic rings (P—O Bidentates, P—O Tridentates, P—O Tetradentates, or P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diphospholedifurans; diphosphorindipyrans; triphospholetrifurans; triphosphorintripyrans; tetraphospholetetrafurans; and tetraphosphorintetrapyrans.

P—O Valence Stabilizer #7: Examples of four-, five-, six-, seven-, eight-, nine-, or ten-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of oxygen or phosphorus and are contained in a combination of heterocyclic rings and hydroxy, carboxy, carbonyl, and phosphine groups (P—O Bidentates, P—O Tridentates, P—O Tetradentates, or P—O Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: oxaphosphatetraphyrins; dioxadiphosphatetraphyrins; oxaphosphahexaphyrins; dioxadiphosphahexaphyrins; and trioxatriphosphahexaphyrins.

As Valence Stabilizer #1: Examples of monoarsines (As Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: arsine, triphenylarsine, ticyclohexylarsine, methyldiphenylarsine, ethyldiphenylarsine, arsinonorbornane, and arsinoadamantane.

As Valence Stabilizer #2: Examples of diarsines (As Monodentates or As—As Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: bis(diphenylarsino)methane, bis(diphenylarsino)ethane, bis(diphenylarsino)propane, bis(diphenylarsino)butane, bis(diphenylarsino)pentane, 1,2-diarsinobenzene, cyclohexane-1,2-diarsine, 1,2-bis(phenylbutylarsino)ethane, o-phenylenebis(methylphenylarsine) and o-phenylenebis(dimethylarsine) (diars). (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

As Valence Stabilizer #3: Examples of triarsines (As—As Bidentates, or As—As Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,1,5,9,9-pentaphenyl-1,5,9-triarsanonane, 3-methyl-3-(As,As-dimethyl)arsinomethyl-1,1,5,5-tetraphenyl-1,5-diarsapentane, As,As-[o-(As-dimethyl)arsinodiphenyl]-(As-phenyl)arsine, As,As-[o-(As-diphenyl)arsinodiphenyl]-(As-phenyl)arsine, hexahydro-2,4,6-trimethyl-1,3,5-triarsinazine. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

As Valence Stabilizer #4: Examples of tetraarsines (As—As Bidentates, As—As Tridentates, or As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 3,3-(As-diphenyl)arsinomethyl-1,1,5,5-tetraphenyl-1,5-diarsapentane. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

As Valence Stabilizer #5: Examples of pentaarsines (As—As Bidentates, As—As Tridentates, or As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 4-[2-(As-diphenyl)arsinoethyl]-1,1,7,10,10-pentaphenyl-1,4,7,10-tetraarsadecane. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

As Valence Stabilizer #6: Examples of hexaarsines (As—As Bidentates, As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: o-phenylenebis[di-3-(As-diphenyl)arsinopropylarsine]. (Note: the aryl derivatives are air-stable, whereas the alkyl derivatives are air-sensitive and therefore unsuitable for these applications).

As Valence Stabilizer #7: Examples of 5-membered heterocyclic rings containing one arsenic atom (As Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: arsole, azarsole, diazarsole, benzarsole, benzazarsole, dibenzarsole, naphtharsole, naphthazarsole.

As Valence Stabilizer #8: Examples of 6-membered heterocyclic rings containing one arsenic atom (As Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: arsenin, azarsenin, diazarsenin, benzarsenin, benzazarsenin, dibenzarsenin, naphtharsenin, and naphthazarsenin.

As Valence Stabilizer #9: Examples of 5-membered heterocyclic rings containing one arsenic atom and having at least one additional arsenic atom binding site not contained in a ring (As Monodentates, As—As Bidentates, As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(As-phenylarsino)arsole; 2,5-(As-phenylarsino)arsole; 2-(As-phenylarsino)benzarsole; 7-(As-phenylarsino)benzarsole; and 1,8-(As-phenylarsino)dibenzarsole.

As Valence Stabilizer #10: Examples of 6-membered heterocyclic rings containing one arsenic atom and having at least one additional arsenic atom binding site not contained in a ring (As Monodentates, As—As Bidentates, As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2-(As-phenylarsino)arsenin; 2,5-(As-phenylarsino)arsenin; 2-(As-phenylarsino)benzarsenin; 7-(As-phenylarsino)benzarsenin; and 1,9-(As-phenylarsino)dibenzarsenin.

As Valence Stabilizer #11: Examples of 5-membered heterocyclic rings containing one arsenic atom and having at least one additional arsenic atom binding site contained in a ring (As Monodentates, As—As Bidentates, As—As Tridentates, As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-biarsole; 2,2′,2′′-triarsole; and 2,2′-bibenzarsole.

As Valence Stabilizer #12: Examples of 6-membered heterocyclic rings containing one arsenic atom and having at least one additional arsenic atom binding site contained in a ring (As Monodentates, As—As Bidentates, As—As Tridentates, As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-biarsenin; 2,2′,2′′-triarsenin; 2,2′,2′′,2′′′-tetraarsenin; 2,2′-bibenzarsenin; and 8,8′-bibenzarsenin.

As Valence Stabilizer #13a: Examples of two-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein both binding sites are composed of arsenic and are not contained in component heterocyclic rings (As—As Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: As,As-diphenyldiarsacyclobutane ([4]aneAs2); As,As-diphenyldiarsacyclopentane ([5]aneAs2); As,As-diphenyldiarsacyclohexane ([6]aneAs2); As,As-diphenyldiarsacycloheptane ([7]aneAs2); As,As-diphenyldiarsacyclooctane ([8]aneAs2); As,As-diphenyldiarsacyclobutene ([4]eneAs2); As,As-diphenyldiarsacyclopentene ([5]eneAs2); As,As-diphenyldiarsacyclohexene ([6]eneAs2); As,As-diphenyldiarsacycloheptene ([7]eneAs2); and As,As-diphenyldiarsacyclooctene ([8]eneAs2).

As Valence Stabilizer #13b: Examples of three-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of arsenic and are not contained in component heterocyclic rings (As—As Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: As,As,As-triphenyltriarsacyclohexane ([6]aneAs3); As,As,As-triphenyltriarsacycloheptane ([7]aneAs3); As,As,As-triphenyltriarsacyclooctane ([8]aneAs3); As,As,As-triphenyltriarsacyclononane ([9]aneAs3); As,As,As-triphenyltriarsacyclodecane ([10]aneAs3); As,As,As-triphenyltriarsacycloundecane ([11]aneAs3); As,As,As-triphenyltriarsacyclododecane ([12]aneAs3); As,As,As-triphenyltriarsacyclohexatriene ([6]trieneAs3); As,As,As-triphenyltriarsacycloheptatriene ([7]trieneAs3); As,As,As-triphenyltriarsacyclooctatriene ([8]trieneAs3); As,As,As-triphenyltriarsacyclononatriene ([9]trieneAs3); As,As,As-triphenyltriarsacyclodecatriene ([1, O]trieneAs3); As,As,As-triphenyltriarsacycloundecatriene ([11]trieneAs3); and As,As,As-triphenyltriarsacyclododecatriene ([12]trieneAs3).

As Valence Stabilizer #13c: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of arsenic and are not contained in component heterocyclic rings (As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: As,As,As,As-tetraphenyltetraarsacyclooctane ([8]aneAs4); As,As,As,As-tetraphenyltetraarsacyclononane ([9]aneAs4); As,As,As,As-tetraphenyltetraarsacyclodecane ([10]aneAs4); As,As,As,As-tetraphenyltetraarsacycloundecane ([11]aneAs4); As,As,As,As-tetraphenyltetraarsacyclododecane ([12]aneAs4); As,As,As,As-tetraphenyltetraarsacyclotridecane ([13]aneAs4); As,As,As,As-tetraphenyltetraarsacyclotetradecane ([14]aneAs4); As,As,As,As-tetraphenyltetraarsacyclopentadecane ([15]aneAs4); As,As,As,As-tetraphenyltetraarsacyclohexadecane ([16]aneAs4); As,As,As,As,As-tetraphenyltetraarsacycloheptadecane ([17]aneAs4); As,As,As,As-tetraphenyltetraarsacyclooctadecane ([18]aneAs4); As,As,As,As-tetraphenyltetraarsacyclononadecane ([19]aneAs4); and As,As,As,As-tetraphenyltetraarsacycloeicosane ([20]aneAs4).

As Valence Stabilizer #13d: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of arsenic and are not contained in component heterocyclic rings (As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: As,As,As,As,As,As-hexaphenylhexaarsacyclododecane ([12]aneAs6); As—As,As,As,As,As-hexaphenylhexaarsacyclotridecane ([13]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclotetradecane ([14]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclopentadecane ([15]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclohexadecane ([16]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacycloheptadecane ([17]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclooctadecane ([18]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclononadecane ([19]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacycloeicosane ([20]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacycloheneicosane ([21]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclodocosane ([22]aneAs6); As,As,As,As,As,As-hexaphenylhexaarsacyclotricosane ([23]aneAs6); and As,As,As,As,As,As-hexaphenylhexaarsacyclotetracosane ([24]aneAs6).

As Valence Stabilizer #14a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of arsenic and are contained in component 5-membered heterocyclic rings (As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraarsoles.

As Valence Stabilizer #14b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of arsenic and are contained in component 5-membered heterocyclic rings (As—As Tetradentates and As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaarsoles.

As Valence Stabilizer #15a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of arsenic and are contained in a combination of 5-membered heterocyclic rings and arsine groups (As—As Tridentates, As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diarsatetraarsoles; and tetraarsatetraarsoles.

As Valence Stabilizer #15b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of arsenic and are contained in a combination of 5-membered heterocyclic rings and phosphine groups (As—As Tridentates, As—As Tetradentates, and As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diarsahexaarsoles; and triarsahexaarsoles.

As Valence Stabilizer #16a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of arsenic and are contained in component 6-membered heterocyclic rings (As—As Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclotetraarsenins.

As Valence Stabilizer #16b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of arsenic and are contained in component 6-membered heterocyclic rings (As—As Tridentates, As—As Tetradentates, and As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclohexaarsenins.

As Valence Stabilizer #17a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of arsenic and are contained in a combination of 6-membered heterocyclic rings and arsine groups (As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diarsacyclotetraarsenins; and tetraarsacyclotetraarsenins.

As Valence Stabilizer #17b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of arsenic and are contained in a combination of 6-membered heterocyclic rings and arsine groups (As—As Tridentates, As—As Tetradentates, or As—As Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diarsacyclohexaarsenins; and triarsacyclohexaarsenins.

Se Valence Stabilizer #1: Examples of monoselenoethers (Se Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hydrogen selenide, dimethyl selenide, diethyl selenide, dioctyl selenide, diphenyl selenide, dicyclohexyl selenide, tetramethylene selenide, trimethylene selenide, dimethylene selenide, and selenobicycloheptane.

Se Valence Stabilizer #2: Examples of diselenoethers (Se Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,5-dimethyl-3,6-diselenaoctane; 2,5-diselenahexane; 2,6-diselenaheptane; 3,7-diselenanonane; 3,6-diselenaoctane; 3-butenyl butyl selenoether (bbs); 4-pentenyl butyl selenoether (pbs); 3-butenyl phenyl selenoether (bps); and 4-pentenyl phenyl selenoether (pps).

Se Valence Stabilizer #3: Examples of triselenoethers (Se Bidentates or Se Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,3,5-triselenane; 2,5,8-triselenanonane; 3,6,9-triselenaundecane; and 2,6,10-triselenaundecane.

Se Valence Stabilizer #4: Examples of tetraselenoethers (Se Bidentates, Se Tridentates, or Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,6,10,14-tetraselenapentadecane and 2,5,8,11-tetraselenadodecane.

Se Valence Stabilizer #5a: Examples of 5-membered heterocyclic rings containing one selenium atom (Se Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydroselenophene, selenophene, selenazole, selenapyrroline, selenaphospholene, selenaphosphole, oxaselenole, selenadiazole, selenatriazole, benzodihydroselenophene, benzoselenophene, benzoselenazole, benzoselenaphosphole, dibenzoselenophene, and naphthoselenophene.

Se Valence Stabilizer #5b: Examples of 5-membered heterocyclic rings containing two selenium atoms (Se Monodentates or Se Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenole, benzodiselenole, and naphthodiselenole.

Se Valence Stabilizer #6a: Examples of 6-membered heterocyclic rings containing one selenium atom (Se Monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydroselenopyran, selenopyran, selenazine, selenadiazine, selenaphosphorin, selenadiphosphorin, oxaselenin, benzoselenopyran, dibenzoselenopyran, and naphthoselenopyran.

Se Valence Stabilizer #6b: Examples of 6-membered heterocyclic rings containing two selenium atoms (Se Monodentates or Se Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dihydrodiselenin, diselenin, benzodiselenin, dibenzodiselenin, and naphthodiselenin.

Se Valence Stabilizer #7: Examples of 5-membered heterocyclic rings containing one selenium atom and having at least one additional selenium atom binding site not contained in a ring (Se Monodentates, Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates, or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,5-diseleno-2,5-dihydroselenophene; 2,5-bis(selenomethyl)-2,5-dihydroselenophene; 2,5-bis(2-selenophenyl)-2,5-dihydroselenophene; 2,5-diseleno(selenophene); 2,5-bis(selenomethyl)selenophene; 2,5-bis(2-selenophenyl)selenophene; 2,5-diseleno(selenazole); 2,5-bis(selenomethyl)selenazole; 2,5-bis(2-selenophenyl)selenazole; and 2,5-diseleno-1,3,4-selenadiazole[bismuthselenol].

Se Valence Stabilizer #8: Examples of 6-membered heterocyclic rings containing one selenium atom and having at least one additional selenium atom binding site not contained in a ring (Se Monodentates, Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates, or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,6-diseleno-2,5-dihydroselenopyran; 2,6-bis(selenomethyl)-2,5-dihydroselenopyran; 2,6-bis(2-selenophenyl)-2,5-dihydroselenopyran; 2,6-diseleno(selenopyran); 2,6-bis(selenomethyl)selenopyran; 2,6-bis(2-selenophenyl)selenopyran; 2,6-diseleno(selenazine); 2,6-bis(selenomethyl)selenazine; 2,6-bis(2-selenophenyl)selenazine; 2,6-diseleno-1,3,5-selenadiazine; 2-seleno-1-benzoselenopyran; 8-seleno-1-benzoselenopyran; and 1,9-diselenodibenzoselenopyran.

Se Valence Stabilizer #9: Examples of 5-membered heterocyclic rings containing one selenium atom and having at least one additional selenium atom binding site contained in a ring (Se Monodentates, Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydroselenophene; 2,2′,2′′-tri-2,5-dihydroselenophene; 2,2′-biselenophene; 2,2′,2′′-triselenophene; 2,2′-biselenazole; 5,5′-biselenazole; 2,2′-bi-1,3,4-selenadiazole; 2,2′-biselenanaphthene; 2,2′-bibenzoselenazole; and 1,1′-bis(dibenzoselenophene).

Se Valence Stabilizer #10: Examples of 6-membered heterocyclic rings containing one selenium atom and having at least one additional selenium atom binding site contained in a ring (Se Monodentates, Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 2,2′-bi-2,5-dihydroselenopyran; 2,2′,2′′-tri-2,5-dihydroselenopyran; 2,2′-biselenopyran; 2,2′,2′′-triselenopyran; 2,2′-bi-1,4-selenazine; 2,2′-bi-1,3,5-selenadiazine; 2,2′-bi-1-benzoselenopyran; and 1,1′-bis(dibenzoselenopyran).

Se Valence Stabilizer #11a: Examples of two-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein both binding sites are composed of selenium (usually selenol or selenoether groups) and are not contained in component heterocyclic rings (Se—Se Bidentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenacyclobutane ([4]aneSe2); diselenacyclopentane ([5]aneSe2); diselenacyclohexane ([6]aneSe2); diselenacycloheptane ([7]aneSe2); diselenacyclooctane ([8]aneSe2); diselenacyclobutene ([4]eneSe2); diselenacyclopentene ([5]eneSe2); diselenacyclohexene ([6]eneSe2); diselenacycloheptene ([7]eneSe2); diselenacyclooctene ([8]eneSe2); diselenacyclobutadiene ([4]dieneSe2); diselenacyclopentadiene ([5]dieneSe2); diselenacyclohexadiene ([6]dieneSe2); diselenacycloheptadiene ([7]dieneSe2); and diselenacyclooctadiene ([8]dieneSe2).

Se Valence Stabilizer #11b: Examples of three-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of selenium (usually selenol or selenoether groups) and are not contained in component heterocyclic rings (Se—Se Tridentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triselenacyclohexane ([6]aneSe3); triselenacycloheptane ([7]aneSe3); triselenacyclooctane ([8]aneSe3); triselenacyclononane ([9]aneSe3); triselenacyclodecane ([10]aneSe3); triselenacycloundecane ([11]aneSe3); triselenacyclododecane ([12]aneSe3); triselenacyclohexene ([6]eneSe3); triselenacycloheptene ([7]eneSe3); triselenacyclooctene ([8]eneSe3); triselenacyclononene ([9]eneSe3); triselenacyclodecene ([10]eneSe3); triselenacycloundecene ([11]eneSe3); triselenacyclododecene ([12]eneSe3); triselenacyclohexatriene ([6]trieneSe3); triselenacycloheptatriene ([7]trieneSe3); triselenacyclooctatriene ([8]trieneSe3); triselenacyclononatriene ([9]trieneSe3); triselenacyclodecatriene ([10]trieneSe3); triselenacycloundecatriene ([11]trieneSe3); and triselenacyclododecatriene ([12]trieneSe3).

Se Valence Stabilizer #11c: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of selenium (usually selenol or selenoether groups) and are not contained in component heterocyclic rings (Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraselenacyclooctane ([8]aneSe4); tetraselenacyclononane ([9]aneSe4); tetraselenacyclodecane ([10]aneSe4); tetraselenacycloundecane ([11]aneSe4); tetraselenacyclododecane ([12]aneSe4); tetraselenacyclotridecane ([13]aneSe4); tetraselenacyclotetradecane ([14]aneSe4); tetraselenacyclopentadecane ([15]aneSe4); tetraselenacyclohexadecane ([16]aneSe4); tetraselenacycloheptadecane ([17]aneSe4); tetraselenacyclooctadecane ([18]aneSe4); tetraselenacyclononadecane ([19]aneSe4); tetraselenacycloeicosane ([20]aneSe4); tetraselenacyclooctadiene ([8]dieneSe4); tetraselenacyclononadiene ([9]dieneSe4); tetraselenacyclodecadiene ([10]dieneSe4); tetraselenacycloundecadiene ([11]dieneSe4); tetraselenacyclododecadiene ([12]dieneSe4); tetraselenacyclotridecadiene ([13]dieneSe4); tetraselenacyclotetradecadiene ([14]dieneSe4); tetraselenacyclopentadecadiene ([15]dieneSe4); tetraselenacyclohexadecadiene ([16]dieneSe4); tetraselenacycloheptadecadiene ([17]dieneSe4); tetraselenacyclooctadecadiene ([18]dieneSe4); tetraselenacyclononadecadiene ([19]dieneSe4); tetraselenacycloeicosadiene ([20]dieneSe4); tetraselenacyclooctatetradiene ([8]tetradieneSe4); tetraselenacyclononatetradiene ([9]tetradieneSe4); tetraselenacyclodecatetradiene ([10]tetradieneSe4); and tetraselenacycloundecatetradiene ([11]tetradieneSe4).

Se Valence Stabilizer #11d: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all binding sites are composed of selenium (usually selenol or selenoether groups) and are not contained in component heterocyclic rings (Se—Se Tridentates, Se—Se Tetradentates, or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaselenacyclododecane ([12]aneSe6); hexaselenacyclotridecane ([13]aneSe6); hexaselenacyclotetradecane ([14]aneSe6); hexaselenacyclopentadecane ([15]aneSe6); hexaselenacyclohexadecane ([16]aneSe6); hexaselenacycloheptadecane ([17]aneSe6); hexaselenacyclooctadecane ([18]aneSe6); hexaselenacyclononadecane ([19]aneSe6); hexaselenacycloeicosane ([20]aneSe6); hexaselenacycloheneicosane ([21]aneSe6); hexaselenacyclodocosane ([22]aneSe6); hexaselenacyclotricosane ([23]aneSe6); hexaselenacyclotetracosane ([24]aneSe6); hexaselenacyclododecatriene ([12]trieneSe6); hexaselenacyclotridecatriene ([13]trieneSe6); hexaselenacyclotetradecatriene ([14]trieneSe6); hexaselenacyclopentadecatriene ([15]trieneSe6); hexaselenacyclohexadecatriene ([16]trieneSe6); hexaselenacycloheptadecatriene ([17]trieneSe6); and hexaselenacyclooctadecatriene ([18]trieneSe6).

Se Valence Stabilizer #12a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of selenium and are contained in component 5-membered heterocyclic rings (Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraselenophenes; tetraselenaphospholes; tetraoxaselenoles; and tetradiselenoles.

Se Valence Stabilizer #12b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of selenium and are contained in component 5-membered heterocyclic rings (Se—Se Tridentates or Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaselenophenes; hexaselenaphospholes; hexaoxaselenoles; and hexadiselenoles.

Se Valence Stabilizer #13a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of selenium and are contained in a combination of 5-membered heterocyclic rings and selenol and selenoether groups (Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenatetraselenophenes; tetraselenatetraselenophenes; diselenatetradiselenoles; and tetraselenatetradiselenoles.

Se Valence Stabilizer #13b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of selenium and are contained in a combination of 5-membered heterocyclic rings and selenol or selenoether groups (Se—Se Tridentates or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenahexaselenophenes; and triselenahexaselenophenes.

Se Valence Stabilizer #14a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of selenium and are contained in component 6-membered heterocyclic rings (Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraselenopyrans; tetraselenaphosphorins; tetraselenadiphosphorins; tetraoxaselenins; and tetradiselenins.

Se Valence Stabilizer #14b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of selenium and are contained in component 6-membered heterocyclic rings (Se—Se Tridentates or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexaselenopyrans; hexaselenaphosphorins; hexaselenadiphosphorins; hexaoxaselenins; and hexadiselenins.

Se Valence Stabilizer #15a: Examples of four-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all four binding sites are composed of selenium and are contained in a combination of 6-membered heterocyclic rings and selenol or selenoether groups (Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenatetraselenopyrans; tetraselenatetraselenopyrans; diselenatetraselenaphosphorins; tetraselenatetraselenaphosphorins; diselenatetraoxaselenins; tetraselenatetraoxaselenins; diselenatetradiselenins; and tetraselenatetradiselenins.

Se Valence Stabilizer #15b: Examples of six-membered macrocyclics, macrobicyclics, and macropolycyclics (including catapinands, cryptands, cyclidenes, and sepulchrates) wherein all six binding sites are composed of selenium and are contained in a combination of 6-membered heterocyclic rings and selenol or selenoether groups (Se—Se Tridentates, Se—Se Tetradentates, or Se—Se Hexadentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenahexaselenopyrans; triselenahexaselenopyrans; diselenahexaselenaphosphorins; triselenahexaselenaphosphorins; diselenahexaoxaselenins; triselenahexaoxaselenins; diselenahexadiselenins; and triselenahexadiselenins.

Se Valence Stabilizer #16: Examples of 1,3-diselenoketones (diseleno-beta-ketonates), 1,3,5-triselenoketones, bis(1,3-diselenoketones), and poly(1,3-diselenoketones) (Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: hexafluoropentanediselenone; 1,3-diphenyl-1,3-propanediselenone; selenobenzoylselenopinacolone; diselenocyclohexoylmethane; diphenylpentanetriselenoate; tetramethylnonanetriselenoate; hexafluoroheptanetriselenoate; trifluoroheptanetriselenoate; 1-(2-thienyl)-1,3-butanediselenone, 1-(2-naphthyl)-1,3-butanediselenone, and trifluoroselenoacetylselenocamphor.

Se Valence Stabilizer #17: Examples of 1,1-diselenolates, bis(1,1-diselenolates), and poly(1,1-diselenolates) (Se—Se Bidentates and Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: 1,1-dicyano-2,2-ethylene diselenolate; 1,1-dicarboalkoxy-2,2-ethylene diselenolate; 1,1-di(trifluoromethyl)-2,2-ethylene diselenolate; 1,1-di(pentafluorophenyl)-2,2-ethylene diselenolate; 1-pentamethylene-2,2-ethylene diselenolate; and 1-nitroethylene diselenolate.

Se Valence Stabilizer #18: Examples of diselenocarbamates, bis(diselenocarbamates), and poly(diselenocarbamates) (including N-hydroxydiselenocarbamates and N-mercaptodiselenocarbamates) (Se—Se Bidentates, Se—Se Tridentates, and Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: dimethyldiselenocarbamate; di(trifluorodimethyl)diselenocarbamate; diethyldiselenocarbamate; dipropyldiselenocarbamate; diisopropyldiselenocarbamate; dibutyldiselenocarbamate; ditertbutyldiselenocarbamate; dicyanamidodiselenocarbamate; azidoselenoformates; diphenyldiselenocarbamate; di(pentafluorophenyl)diselenocarbamate; dibenzyldiselenocarbamate; dinaphthyldiselenocarbamate; dicyclohexyldiselenocarbamate; dinorbornyldiselenocarbamate; diadamantyldiselenocarbamate; pyrrolidinodiselenocarbamate; piperidinodiselenocarbamate; morpholinodiselenocarbamate; thiamorpholinodiselenocarbamate; 3-pyrrolinodiselenocarbamate; pyrrolodiselenocarbamate; oxazolodiselenocarbamate; isoxazolodiselenocarbamate; thiazolodiselenocarbamate; isothiazolodiselenocarbamate; indolodiselenocarbamate; carbazolodiselenocarbamate; pyrazolinodiselenocarbamate; imidazolinodiselenocarbamate; pyrazolodiselenocarbamate; imidazolodiselenocarbamate; indazolodiselenocarbamate; and triazolodiselenocarbamate.

Se Valence Stabilizer #19: Examples of triselenophosphoric acids (phosphorotriselenoic acids), bis(triselenophosphoric acids), poly(triselenophosphoric acids), and derivatives thereof (Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: triselenophosphoric acid, O-phenyltriselenophosphoric acid, O-benzyltriselenophosphoric acid, O-cyclohexyltriselenophosphoric acid, O-norbornyltriselenophosphoric acid, O,Se-diphenyltriselenophosphoric acid, O,Se-dibenzyltriselenophosphoric acid, O,Se-dicyclohexyltriselenophosphoric acid, and O,Se-dinorbornyltriselenophosphoric acid.

Se Valence Stabilizer #20: Examples of diselenophosphoric acids (phosphorodiselenoic acids), bis(diselenophosphoric acids), poly(diselenophosphoric acids), and derivatives thereof (Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: diselenophosphoric acid, O-phenyldiselenophosphoric acid, O-benzyldiselenophosphoric acid, O-cyclohexyldiselenophosphoric acid, O-norbornyldiselenophosphoric acid, O,O-diphenyldiselenophosphoric acid, O,O-dibenzyldiselenophosphoric acid, O,O-dicyclohexyldiselenophosphoric acid, and O,O-dinorbornyldiselenophosphoric acid.

Se Valence Stabilizer #21: Examples of tetraselenophosphoric acids (phosphorotetraselenoic acids), bis(tetraselenophosphoric acids), poly(tetraselenophosphoric acids), and derivatives thereof (Se—Se Bidentates, Se—Se Tridentates, Se—Se Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: tetraselenophosphoric acid, Se-phenyltetraselenophosphoric acid, Se-benzyltetraselenophosphoric acid, Se-cyclohexyltetraselenophosphoric acid, Se-norbornyltetraselenophosphoric acid, Se,Se-diphenyltetraselenophosphoric acid, Se,Se-dibenzyltetraselenophosphoric acid, Se,Se-dicyclohexyltetraselenophosphoric acid, and Se,Se-dinorbornyltetraselenophosphoric acid.

Se Valence Stabilizer #22: Examples of diselenocarbonates, triselenocarbonates, bis(diselenocarbonates), and bis(triselenocarbonates), (Se—Se Bidentates and S—S Tetradentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: Se,Se-diethyldiselenocarbonate; Se,Se-diisopropyldiselenocarbonate; Se,Se-diphenyldiselenocarbonate; Se,Se-dibenzyldiselenocarbonate; Se,Se-dicyclohexyldiselenocarbonate; Se,Se-dinorbornyldiselenocarbonate; diethyltriselenocarbonate; diisopropyltriselenocarbonate; diphenyltriselenocarbonate; dibenzyltriselenocarbonate; dicyclohexyltriselenocarbonate; and dinorbornyltriselenocarbonate.

Se Valence Stabilizer #23: Examples of selenocyanate ligands (Se monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: selenocyanate (—SeCN).

Se Valence Stabilizer #24: Examples of selenolates (Se monodentates) that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: selenophenol; and naphthaleneselenol.

Miscellaneous Valence Stabilizer #1: Examples of diene, bicyclicand tricyclic hydrocarbon ligands that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyclopentadiene; azulene; carotene; norbornane; and adamantane.

Miscellaneous Valence Stabilizer #2: Examples of cyanide and related ligands that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: cyanide (—CN); and fulminate (—CNO).

Miscellaneous Valence Stabilizer #3: Examples of carbonyl ligands that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: carbonyl (—CO); and carbon dioxide (CO2) ligands.

Miscellaneous Valence Stabilizer #4: Examples of halogens that meet the requirements for use as “narrow band” valence stabilizers for Mn+3 and/or Mn+4 include, but are not limited to: fluorine; chlorine; bromine; and iodine.

Water-soluble precursors for the organic valence stabilizers are typically used to ensure that sufficient material is available for pigment synthesis. However, in the case of organic valence stabilizers, it is also possible to synthesize the desired MnIII or MnIV/valence stabilizer compounds from organic solvent systems. Therefore, solubility in organic solvents (for the precursors) is also acceptable. Identification of suitable water soluble precursors can be difficult because many of these organics do not form a wide range of water-soluble compounds.
3e) Mixed Inorganic/Organic Valence Stabilizers
Mixing organic and inorganic valence stabilizers in a pigment solution will often result in a pigment with poor corrosion inhibiting properties because of cross interference. Inorganic and organic stabilizers interact with MnIII and/or MnIV in different ways. For example, inorganic valence stabilizers perform their function by forming a shell of octahedrally or square pyramidally coordinated anionic species around a captured MnIII or MnIV ion. The net charge of these inorganic MnIII- or MnIV-stabilizer compounds is therefore always negative. Organic species stabilize by the formation of a hard or soft bond between the bonding atom in the stabilizer (e.g., oxygen, nitrogen, or sulfur) and the MnIII or MnIV ion. The net charge of these compounds is usually positive. If these two very different types of stabilization ligands are combined, then the magnitude of the charge on the stabilized compound can be significantly reduced. The performance of organic or inorganic stabilized corrosion inhibitor compounds has been found to be related to the ability of the compound to form and sustain a thick electrostatic barrier layer. Additionally, a mixed stabilizer will have a poorly developed electrostatic field and a non-optimal packing around the MnIII or MnIV ion, resulting in a compound with less resistance to aqueous attack. Mixed organic/inorganic stabilized MnIII or MnIV pigments can perform more poorly than pigments that have exclusively inorganic or organic valence stabilizers for this reason.
4) Additional Solubility Control Agents
The use of additional solubility control agents is optional. For example, the anions or cations present in the pigment synthesis bath useful for preparation of “sparingly soluble” pigments may be sufficient to form compounds with the desired solubility and saturated pH characteristics. However, pigment synthesis may produce compounds with greater than optimal solubilities, and the use of additional solubility control agents may be desirable. In situations where fine tuning of solubility or saturated pH is desired, cationic species are typical for MnIII- or MnIV-stabilizer combinations when an inorganic valence stabilizer is used, and anionic species are typical for MnIII or MnIV/organic valence stabilizer combinations.
Additional solubility and saturated pH control can be achieved through the use of nontoxic inorganic cations, which include, but are not limited to: H+, Li+, Na+, K+, Rb+, Cs+, NH4+, Mg+2, Ca+2, Sr+2, Y+3, La+3, Ce+3, Ce+4, Nd+3, Pr+3, Sc+3, Sm+3, Eu+3, Eu+2, Gd+3, Tb+3, Dy+3, Ho+3, Er+3, Tm+3, Yb+3, Lu+3, Ti+4, Zr+4, Ti+3, Hf+4, Nb+5, Ta+5, Nb+4, Ta+4, Mo+6, W+6, Mo+5, W+5, Mo+4, W+4, Mn+2, Mn+3, Mn+4, Fe+2, Fe+3, Co+2, Co+3, Ru+2, Ru+3, Ru+4, Rh+3, Ir+3, Rh+2, Ir+2, Pd+4, Pt+4, Pd+2, Pt+2, Cu+, Cu+2, Cu+3, Ag+, Ag+2,Ag+3, Au+, Au+2, Au+3, Zn+2, Al+3, Ga+3, Ga+, In+3, In+, Ge+4, Ge+2, Sn+2, Sn+4, Sb+3, Sb+5, Bi+3, and Bi5. Any water compound containings these cations can be used for this purpose. The nitrates, chlorides, bromides, and perchlorates of these cations offer inexpensive water-soluble precursors, although many other water-soluble precursors exist. The use of alkaline ions such as Mg+2, Ca+2, and Sr+2 for solubility control has been demonstrated successfully, with acceptable saturated pH values.
Cationic solubility control may also be achieved through the use of nontoxic organic cations that include, but are not limited to: quaternary ammonium compounds (NR4+, where R can be any combination of alkyl, aromatic, or acyclic organic substituents, such as the methyltriethylammonium ion); organic compounds containings at least one N+ site (such as pyridinium or thiazolium cations); organic compounds containing at least one phosphonium site (P+, such as the benzyltriphenylphosphonium ion); organic compounds containing at least one stibonium site (Sb+, such as the tetraphenylstibonium ion); organic compounds containing at least one oxonium site (O+, such as pyrylium cations); organic compounds containing at least one sulfonium site (S+, such as the triphenylsulfonium ion); and organic compounds containing at least one iodonium site (I+, such as the diphenyliodonium ion).
The quaternary ammonium compounds, organic compounds containing at least one N+ site, and organic compounds containing at least one oxonium site are the most important of these classifications because of the very large number of stable cations that are available. Water-soluble precursors for these organic cations are desirable in order to maximize the amount of material available in the appropriate pigment synthesis solution. Most of these materials are also soluble in organic solvents and hydrocarbons. Fluorides, chlorides, and bromides offer the most water-soluble precursors for these organic cations, although nitrates and perchlorates of those cations with lower molecular weights (e.g., tetramethylammonium) are also acceptable water-soluble precursors. Nitrates and perchlorates of larger (greater molecular weight) organic cations are generally not acceptable as precursors because of their low water solubility.
Toxic inorganic or organic cations can be used as additional solubility control agents although this is less desirable. Examples of toxic inorganic cations that can be used include, but are not limited to: Be+2, Ba+2, V+5, V+4, V+3, Cr+3, Ni+2, Ni+4, Os+4, Cd+2, Hg+1, Hg+2, Tl+, Tl+3, As+3, As+5, Pb+2, and Pb+4. Examples of toxic organic cations include, but are not limited to: organic compounds containing at least one arsonium site (an example being the tetraphenylarsonium ion of As+) and organic compounds containing at least one selenonium site (an example being the triphenylselenonium ion of Se+). Use of these materials for additional solubility control may be necessary in some specific instances where the toxicity of the resulting pigment is of limited importance to the operator. Water-soluble precursors for these toxic cations are typical in order to maximize the amount of available cation for solubility control in aqueous-based synthesis solutions. The organic cations are frequently hydrocarbon-soluble. In general, the nitrates, chlorides, bromides, and perchlorates of these cations offer the highest water solubility.
Additional solubility control can also be achieved by using nontoxic inorganic anions, especially for MnIII or MnIV/organic valence stabilizer combinations. Soluble precursors for these inorganic anions are desirable in order to maximize the amount of material available in the appropriate pigment formation solution. Inorganic examples include, but are not limited to: fluorotitanates, chlorotitanates, fluorozirconates, chlorozirconates, fluoroniobates, chloroniobates, fluorotantalates, chlorotantalates, molybdates, tungstates, permanganates, fluoromanganates, chloromanganates, fluoroferrates, chloroferrates, fluorocobaltates, chlorocobaltates, fluorozincates, chlorozincates, borates, fluoroborates, fluoroaluminates, chloroaluminates, carbonates, silicates, fluorosilicates, fluorostannates, nitrates, nitrites, azides, phosphates, phosphites, phosphonates, phosphinites, thiophosphates, thiophosphites, thiophosphonates, thiophosphinites, fluorophosphates, fluoroantimonates, chloroantimonates, sulfates, sulfites, sulfonates, thiosulfates, dithionites, dithionates, fluorosulfates, tellurates, fluorides, chlorides, chlorates, perchlorates, bromides, bromates, iodides, iodates, periodates, and heteropolyanions (e.g., heteropolymolybdates or silicomolybdates).
Additional solubility control can also be achieved through the use of an almost unlimited number of nontoxic organic anions (e.g., organics with different carboxylate or acid groups). Examples include, but are not limited to: ferricyanides; ferrocyanides; cyanocobaltates; cyanocuprates; cyanomanganates; cyanates; cyanatoferrates; cyanatocobaltates; cyanatocuprates; cyanatomanganates; thiocyanates; thiocyanatoferrates; thiocyanatocobaltates; thiocyanatocuprates; thiocyanatomanganates; cyanamides; cyanamidoferrates; cyanamidocobaltates; cyanamidocuprates; cyanamidomanganates; nitritoferrates; nitritocobaltates; azides; (thio)carboxylates, di(thio)carboxylates, tri(thio)carboxylates, or tetra(thio)carboxylates [useful representatives including, but not limited to, acetic acid, benzoic acid, succinic acid, fumaric acid, salicylic acid, lactic acid, tartaric acid, antimonyl tartrates, cinnamic acid, adipic acid, phthalic acid, terephthalic acid, citric acid, ascorbic acid, malic acid, malonic acid, oxalic acid, stearic acid, gallic acid, naphthenic acid, camphoric acid, nitrosalicylic acid, aminosalicylic acid, acetylsalicylic acid, sulfosalicylic acid, nitrobenzoic acid, perfluoroC2-16carboxylic acids, trinitrobenzoic acid, chlorobenzoic acid, anisic acid, iodobenzoic acid, anthranilic acid, mandelic acid, toluic acid, nicotinic acid, isonicotinic acid, pyrazolecarboxylic acid, picrolonic acid, quinaldic acid, diphenic acid, benzoquinaldic acid, quinolinecarboxylic acid, isoquinolinecarboxylic acid, triazinecarboxylic acid, (thio)carbonic acids, (thio)carbamic acids, trimethylhexylic acid, tetrafluorophthalic acid, ethylenediaminetetraacetic acid, toluoylpropionic acid, lactobionic acid, octylthiopropionate, lipoic acid, methylbenzoylpropionic acid, anthracenesuccinic acid, benzothiazolecarboxylic acid, phenylacetic acid, glycolic acid, thioglycolic acid, benzothiazolylthiosuccinic acid, benzothiazolylthiopropionic acid, phenylanthranilic acid, furancarboxylic acid, nitrofuroic acid, phosphonobutanetricarboxylic acid, benzothiazolylthiosuccinic acid, N-phosphonomethylglycine, cresoxyacetic acid, aminobutyric acid, alanine, asparagine, cysteine, glutamine, glycine, leucine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, valine, glutamic acid, aspartic acid, arginine, histidine, lysine, trihydroxyglutaric acid, phenoxyacetic acid, hydroxynaphthoic acid, phenylbutyric acid, hydroxyphosphonoacetic acid, tropic acid, aminophenylpropionic acid, dihydrocinnamic acid, hydroxycinnamic acid, cinchomeronic acid, aurintricarboxylic acid, benzotriazolecarboxylic acid, hydroxyphosphonoacetic acid, cyanuric acid, barbituric acid, violuric acid, diphenylvioluric acid, dilituric acid, thiobarbituric acid, cresotic acid, trimethylhexylic acid, nitrilotriacetic acid, N,N′-terephthaloylbis(aminocaproic acid), ethyleneglycolbis(aminoethylether)tetraacetic acid, diethylenetriaminepentaacetic acid, 2-phosphonobutanetricarboxylic acid, N,N′-bis(2-hydroxysuccinyl)ethylenediamine, nicotinic acid, naptalam, nitrobenzoic acid, nonylphenoxyacetic acid, and olsalazine]; (thio)phenolates, di(thio)phenolates, tri(thio)phenolates, or tetra(thio)phenolates [useful representatives including, but not limited to, pyrocatechol, resorcinol, picric acid, styphnic acid, pyrogallol, purpurin, purpurogallin, benzopurpurin, gallein, thiophenol, rhodizonic acid, kojic acid, chromotropic acid, carminic acid, fluorescein, tannic acid, and humic acid]; (thio)phosphonates, di(thio)phosphonates, or tri(thio)phosphonates [useful representatives including, but not limited to, diethylphosphonic acid, diphenylphosphonic acid, nitrophenylphosphonic acid, perfluoroC2-16phosphonic acids, benzenephosphonic acid, phytic acid, hydroxyethylidenebisphosphonic acid, nitrilotrimethylenephosphonic acid, aminomethylenephosphonic acid, etidronic acid, ethylphosphonic acid, chloroethylphosphonic acid, ethylenediaminotetramethylenephosphonic acid, laurylhydroxydiphosphonic acid, methylaminodimethylenephosphonic acid, alkyl(aryl)diphosphonic acids, N-cetylaminoethanediphosphonic acid, carboxyhydroxymethylphosphonic acid (hpa), oxyethylidenediphosphonic acid, polycaproamidophosphonates, phenylethanetriphosphonic acid, oxidronic acid, and pamidronic acid]; (thio)phosphonamides, di(thio)phosphonamides, or tri(thio)phosphonamides [useful representatives including, but not limited to, phosphoramidic acid, phosphordiamidic acid (diamidophosphonic acid), and phosphoramidothioic acid]; amino(thio)phosphonates, diamino(thio)phosphonates, or triamino(thio)phosphonates; imino(thio)phosphonates or diimino(thio)phosphonates; (thio)sulfonates, di(thio)sulfonates, or tri(thio)sulfonates [useful representatives including, but not limited to, methanesulfonic acid, benzenesulfonic acid, aminobenzenesulfonic acid (sulfanilic acid), nitrobenzenesulfonic acid, phenylsulfonic acid, naphthalenesulfonic acid, nitronaphthalenesulfonic acid, oxinesulfonic acid, alizarinsulfonic acid, benzidinesulfonic acid, flavianic acid, camphorsulfonic acid, diiodophenolsulfonic acid (sozoiodol), 8-hydroxyquinoline-5-sulfonic acid, 7-nitro-8-hydroxyquinoline-5-sulfonic acid; benzotriazolesulfonic acid, bis(trifluoromethyl)benzenesulfonic acid, diiododihydroxybenzophenonesulfonic acid, p-amino-p′-ethoxydiphenylamine-o-sulfonic acid, 1-amino-2-naphthol-4-sulfonic acid; 1,2-diaminoanthraquinone-3-sulfonic acid, 1,5-dinitro-2-naphthol-7-sulfonic acid, perfluoroC2-16sulfonic acids, benzenedisulfonic acid, phenyldisulfonic acid, naphthalenedisulfonic acid, 3,6-naphtholdisulfonic acid, indigodisulfonic acid, benzidinedisulfonic acid, carboxyiodobenzenesulfonic acids; N-benzeneaminomethanesulfonic acid (ams); amido-G-acid; amido-R-acid; naphthalene(di)sulfonic acid (Armstrong's acid); amsonic acid; Badische acid; camphorsulfonic acid; chrysophenine; Cassella's acid; chromotropic acid; Cleve's acid; croceic acid; anthracenesulfonic acid; hydroxyquinolinesulfonic acid; hydrazinobenzenesulfonic acid; indigo carmine; indoxyl; isatinsulfonic acid; indican; lignosulfonic acid; metanil yellow; metanilic acid; naphthoquinonesulfonic acid; Nuclear Fast Red; naphthol(di)sulfonic acid; naphthylamine(di)sulfonic acid; Acid Orange I; orthanilic acid; phenol(di)sulfonic acid; methylenedinaphthalenesulfonic acid; methyl orange; and piperazinediethanesulfonic acid (pipes)]; (thio)sulfonamides, di(thio)sulfonamides, or tri(thio)sulfonamides; amino(thio)sulfonates, diamino(thio)sulfonates, or triamino(thio)sulfonates; imino(thio)sulfonates (including sulfamates) or diimino(thio)sulfonates (including disulfamates) [useful representatives including, but not limited to, methylsulfamic acid and phenylsulfamic acid]; (thio)borates, di(thio)borates, or (thio)boronates [useful representatives including, but not limited to, phenylboric acid and borotartaric acid]; organic silicates; and stibonates [useful representatives including, but not limited to, antimonyl tartrate and benzenestibonic acid]. Soluble precursors for these organic anions are desirable to maximize the amount available in the appropriate pigment synthesis solution. These organic anions are frequently soluble in organic solvents or hydrocarbons in addition to water-based systems.
Finally, toxic inorganic or organic anions can be used as additional solubility control agents, although they are less desirable. Examples of toxic inorganic anions include, but are not limited to: arsenates, arsenites, fluoroarsenates, chloroarsenates, selenates, selenites, fluorothallates, chlorothallates, iodomercury anions (e.g., Nessler's reagent), thiocyanatomercury anions (e.g., Behren's reagent), chloromercurates, bromomercurates, osmates, fluoronickelates, chromates, Reinecke's salt, and vanadates. Examples of toxic organic anions include cyanides; cyanochromates; cyanonickelates; cyanatochromates; cyanatonickelates; thiocyanatochromates; thiocyanatonickelates; cyanamidochromates; cyanamidonickelates; nitritonickelates; arsonates, diarsonates, or triarsonates [useful representatives being propylarsonic acid, phenylarsonic acid, hydroxyphenylarsonic acid, benzenearsonic acid, methylbenzenearsonic acid, hydroxybenzenearsonic acid, and nitrobenzenearsonic acid]; and organic selenates, diselenates, or triselenates. These materials may be necessary in some specific instances for additional solubility control where toxicity of the final pigment material is of limited importance. Soluble precursors for these organic anions are desirable to maximize the amount available in the appropriate pigment synthesis solution. The alkali or ammonium species of these anions typically offer the greatest water solubility.
Solubility control agents can also be used for “low solubility” and “insoluble” MnIII and MnIV pigments for use as lead chromate and/or red lead replacements. However, the choice of solubility control agents is limited due to the chemistry and preparation methods for these pigments. These pigments are typically prepared by calcining, firing, or otherwise heating powder mixtures, so organic solubility control agents are not acceptable because of thermal degradation. In addition, because these calcined or fired manganese-containing mixtures result in complex oxide compounds, there is no need to add anionic solubility control agents. The only solubility control agents suitable for use with the “low solubility” or “insoluble” MnIII or MnIV pigments will overwhelmingly be inorganic cations.
Solubility control agents for calcined, fired, or otherwise heated MnIII and/or MnIV-containing pigments include, but are not limited to: Li+, Na+, K+, Rb+, Cs+, Be+2, Mg+2, Ca+2, Sr+2, Ba+2, Y+3, La+3, Ce+3, Ce+4, Ti+4, Zr+4, V+5, Nb+5, Ta+5, Mo+6, W+6, Cr+3, Mn+2, Fe+3, Fe+2, Co+2, Co+3, Ni+2, Cu+2, Ag+, Ag+2, Zn+2, Al+3, In+3, Sn+4, Sb+3, Sb+5, Bi+3, and Bi+5. Table 6 shows example compositions of low solubility or insoluble MnIII or MnIV compounds suitable as pigments that can be produced for many of these solubility control cations. It is interesting to note the similarity between these compositions and those shown in Table 1 for naturally-occurring MnIII or MnIV minerals, further validating their long-term stability. As the solubility control cation is changed, dramatic differences in solubility can be observed. For example, Mg-containing MnIII or MnIV pigments (i.e., MgMn2O4) exhibit higher solubilities (i.e., 10−4 moles/liter MnIII or MnIV) whereas Ba-containing MnIII or MnIV pigments (i.e., BaMnO3) exhibit much lower (i.e., 10−8 or 10−9 moles/liter MnIII or MnIV) solubilities. In this way, even the performance of calcined or fired MnIII or MnIV ceramic powders can be tailored for specific applications. Combinations of these ions can also be used to modify performance.
It has been noted that one of the primary functionalities of lead chromate and especially red lead pigments is the ability to insolubilize corrosive anions (especially sulfate) via the divalent lead ion. Similar functionality can be achieved using proper choice of the solubility control agents described above. For example, barium (Ba+2) is notorious for its ability to insolubilize sulfate ions. Bismuth (Bi+3) can produce insoluble chlorides under the proper conditions. Therefore, of the cationic solubility control agents listed above for “low solubility” or “insoluble” MnIII and MnIV pigments, those containing Ba+2, Bi+3, and Bi+5 are typical.
Similarly, compositions containing cations that are themselves corrosive towards structural metals are less desirable. Hence, compositions containing potassium (K+) and especially sodium (Na+) are less desirable.







TABLE 6







Representative Examples of Low Solubility or Insoluble MnIII


or MnIV Pigments Suitable For Lead Chromate or Red Lead


Replacements









Solubility
Example



Control Cation
Composition(s)
Comments





None
MnO2, Mn3O4,
No compositional



Mn2O3, MnO(OH),
modification of properties



Mn(O,OH)2


Lithium (Li+)
LiMn2O4


Magnesium (Mg+2)
MgMn2O4
Highest solubility of



MgMnO3
calcined pigments




MgMnO3 is unstable




Solid solutions with




MgAl2O4 or MgFe2O4 also




possible


Calcium (Ca+2)
CaMnO3,
CaMnO3 most stable



CaMn2O4,
Solid solutions with Co,



Ca2MnO4
Fe, Ni, Bi, Ba, Zn, Sr, La,




Ce, and Y formulas also




possible


Strontium (Sr+2)
SrMnO3
Solid solutions with Ca,




Zn, Ba, Bi, La, Ce, and Y




formulas also possible


Barium (Ba+2)
BaMnO3,
Solid solutions with Sr,



BaMn8O16
Ca, Zn, Bi, La, Y, and Ce




formulas also possible


Zinc (Zn+2)
ZnMn2O4,
Solid solutions with Co,



ZnMn3O7
Cu, Ni, Fe, Ca, Sr, Ba, La,




Ce, Y, and Bi formulas also




possible


Bismuth (Bi+3)
BiMnO3, BiMn2O5
Solid solutions with Ca,




Sr, Ba, Zn, La, Ce, and Y




formulas also possible


Lanthanum (La+3)
LaMnO3
Solid solutions with Sr,




Ca, Zn, Ba, Ce, Bi, and Y




formulas also possible


Cerium (Ce+3)
CeMnO3
Solid solutions with Sr,




Ca, Zn, Ba, Bi, La, and Y




formulas also possible


Yttrium (Y+3)
YMnO3
Solid solutions with Sr,




Ca, Zn, Ba, Bi, La, and Ce




formulas also possible


Aluminum (Al+3)
AlMn2O4
Exhibits higher solubility




Somewhat unstable


Cobalt (Co+2)
CoMn2O4,
Solid solutions with Ni,



CoMn3O7
Fe, Zn, Cu, and Ca formulas




also possible


Nickel (Ni+2)
NiMn2O4, NiMn3O7
Solid solutions with Co,




Fe, Zn, Cu, and Ca formulas




also possible


Iron (Fe+2)
FeMn2O4, FeMn3O7
Solid solutions with Co,




Ni, Zn, Cu, and Ca formulas




also possible


Copper (Cu+2)
CuMn2O5,
Solid solutions with Zn,



CuMn3O7
Co, Fe, Ni formulas also




possible









5) Valence Stabilizers for “Indicator Pigments”

Some heteropolymetallate valence stabilizers for trivalent or tetravalent manganese pigments have been observed to result in pigments that change color as the MnIII- or MnIV-stabilizer compound was exhausted during corrosion. For example, molybdate-stabilized MnIV pigments are typically maroon in color after being prepared and combined with a suitable binder system. These pigments were observed to gradually change from maroon to royal blue after extended exposure to ASTM B-117 and ASTM G-85 accelerated corrosion testing environments. The rate of color change was gradual with time and scaled with initiation and continued corrosion of the substrate. The color change from maroon to blue is well-documented in the inorganic chemistry literature for heteropolymolybdates. Numerous studies have shown that the color change associated with molybdenum blues is due to reduction of the molybdenum (VI) ion (the valence stabilizer for MnIV in this example), to the more reduced molybdenum (IV) ion. Other manganese-containing compounds can exhibit differences in color with the change in valence of the manganese ion in the pigment compound. Organometallic literature has many examples of manganese compounds where an organic trivalent or tetravalent manganese compound is one color and the divalent compound is a different color.
Color changes in the paint can be used as a metric to determine when the corrosion-inhibiting ability of the pigment has begun to fail. Alternatively, changes in pigment color hue may suggest remaining corrosion-inhibiting service life. The color change behavior is not observed for all MnIII- or MnIV-valence stabilizer combinations. Those compositions that do exhibit a significant color change between fully oxidized and reduced valence states are typical for applications where an indication of the amount of remaining unreacted pigment is desired. This represents an advantage over conventional chromate or plumbate pigments which do not demonstrate a significant color change during reduction.
B) Pigment Synthesis
The manganese compounds of the present invention can be synthesized by many different formation routes, and the synthesis of specific trivalent or tetravalent manganese compounds is often found in the general manganese coordination chemistry literature. The syntheses of several trivalent or tetravalent manganese compounds suitable for use as pigments are outlined in the Examples section of this specification.
The pigments can be synthesized via precipitation routes (including onto inorganic or organic substrates), by firing of constituents at elevated temperatures, by evaporative routes, by freezing, by freeze drying, etc. In general, “sparingly soluble” MnIII and MnIV pigments are best prepared by precipitation or evaporation routes, whereas “low solubility” or “insoluble” MnIII and MnIV pigments are best prepared by firing of constituents. Precipitation is a typical synthesis route, for “sparingly soluble” pigments because: a) it is easiest to control, b) it allows inorganic valence stabilizers to polymerize, and c) many organic valence stabilizer precursors are degraded by high temperatures. Precipitation from aqueous (water-based) solutions is typical, because the formed trivalent or tetravalent manganese pigment materials are required to be sparingly soluble in water in order to function adequately as corrosion-inhibitors. For the more soluble pigments (i.e., with solubilities as high as 1×100 moles/liter of trivalent or tetravalent manganese, for specialized applications), precipitation can be aided by traditional salting-out methodologies, such as adding salt or alcohols to further facilitate precipitation. If desired, precipitation onto or in combination with inert materials such as oxides, hydroxides, silicates, borates, aluminates, phosphates, carbonates, titanates, molybdates, tungstates, oxalates, polymers, etc., can be initiated. An almost infinite variety of colors, hues, tints, solubilities, saturated pHs, decomposition temperatures, melting points, and corrosion-inhibiting action can be produced in pigments based solely on the MnIII or MnIV ions.
Organic solvents can also be used for the synthesis of these pigments, especially for many of the organic valence-stabilized manganese compounds. Conventional organic solvents include, but are not limited to: methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, sec-butanol, benzyl alcohol, glycerol, ethylene glycol, propylene glycol, cresol, cyclohexanol, butyl Carbitol® (diethylene glycol monobutyl ether), Cellosolve® (ethylene glycol monoetheyl ether), methyl Cellosolve® (ethylene glycol monomethy ether), ethyl lactate, acetone, methyl ethyl ketone (MEK), diethyl ketone, methyl isobutyl ketone (MIBK), cyclohexanone, acetophenone, diethyl ether, isopropyl ether, furan, tetrahydrofuran (THF), dioxane, tetrahydropyran, methyl formate, ethyl formate, methyl acetate, ethyl acetate, methyl propionate, ethyl propionate, methyl butyrate, ethyl butyrate, propylene oxide, acetic acid, propionic acid, butyrolactone, ethylene carbonate, propylene carbonate, benzaldehyde, propyl amine, diethyl amine, ethanolamine, aniline, pyridine, acetonitrile, dimethylformamide (DMF), propionitrile, nitrobenzene, hexane, cyclohexane, benzene, toluene, xylene, carbon tetrachloride, chloroform, methylene chloride, dichloroethane, trichloroethane, trichloroethylene, chlorobenzene, Freon® 113 (trichlorotrifluoroethane), carbon disulfide, dimethyl sulfoxide (DMSO), and hexamethylphosphoric triamide (HMPT). These solvents can be used in instances where the specific MnIII or MnIV/valence stabilizer is insoluble in that specific solvent and sparingly soluble in water, or in instances where evaporative formation of fine particle sizes is desired.
A typical MnIV compound with inorganic valence stabilization was prepared as follows:
1) the stabilizer was dissolved in a minimum of water with added acetic acid or sodium acetate to buffer the solution to the proper pH;
2) manganese nitrate was dissolved in a separate buffered water solution;
3) the stabilizer solution was heated to near boiling and the manganese solution added all at once;
4) this stabilizer-manganese solution was heated for 15 to 60 minutes with a potassium acetate buffer to initiate inorganic polymerization of the valence stabilizer in the presence of a persulfate oxidizer to form tetravalent manganese;
5) this solution (mother liquor) was cooled and any precipitate filtered;
6) the mother liquor was separated into five fractions and an additional solubility control agent was added; and
7) each solution from step 6 was ice chilled and precipitates filtered and dried.
Solubility control agents Mg, Ca, Zn, Sr, and Ba were used to obtain a broad spectrum of solubilities with a single MnIV-valence stabilizer combination. Occasionally a precipitate would not form with the addition of a “solubility control agent” or a day of evaporation. This would imply that the target compound was extremely water soluble and unsuited for use as a pigment. Conversely, a precipitate would occasionally form immediately on addition of the last pH buffer or even the oxidizing agent. This would imply that the target MnIV compound was extremely insoluble and unsuited for use as a corrosion inhibiting pigment when incorporating the buffer or oxidizer's cations.
Those of skill in the art will appreciate that variations in the method described can be made. For example, the manganese solution and the valence stabilizer solution can be combined either by adding the manganese solution to the valence stabilizer or vice versa. The valence stabilizer can be added to the manganese solution or provided as a separate solution. The solubility control agent can be added to the manganese solution or to a separate valence stabilizer solution. Alternatively, it can be provided as a separate solution. The manganese solution can be cooled or heated as needed.
MnIII and MnIV pigments with organic valence stabilizers were synthesized in a similar fashion. Water-soluble organic ligands (i.e., the azo dye examples) allowed the entire synthesis to be performed in aqueous solution. Valence stabilizers of low water solubility (i.e., 8-hydroxyquinoline) were complexed in an isopropanol/water mixture. It was not necessary to carefully control pH of the organic syntheses because polymerization like that needed for the heteropolymetallate inorganic stabilizers was not necessary. Anionic “solubility control agents” such as sulfate, phosphate, molybdate, tungstate, and phosphomolybdate were used for the organic examples to form progressively larger compounds with less solubility.
The color of MnIII or MnIV pigments depends on the specific MnIII- or MnIV-valence stabilizer combination. Inorganically valence stabilized MnIII or MnIV compounds ranged from maroon to black. The color of MnIII and MnIV pigments incorporating organic valence stabilizers often matched the color of the valence stabilizer. This was particularly true of the azo dyes. The colors of the organically stabilized pigments were orange-yellow ranging to green or brown.
Oxidation of divalent manganese to the trivalent or tetravalent oxidation state can be performed prior to, or after, compound formation. If trivalent or tetravalent manganese salts are to be used for synthesis, then additional oxidation may or may not be necessary, depending upon the synthesis conditions. For example, a MnIII or MnIV/valence stabilizer coordination compound could be prepared, or a MnII/valence stabilizer compound could be prepared and subsequently oxidized to a MnIII or MnIV/valence stabilizer compound. Oxidation prior to compound formation is typical, however, to ensure that the stability of the formed compound is maintained.
The stability of compounds using the same valence stabilizer ligand differs significantly because of the difference in size between the MnII, MnIII, and MnIV ions (67 pm versus 61 pm versus 54 pm). This has to do with the size requirements of the coordinating ligand. Therefore, one ligand geometry may result in a very stable MnII compound, but the same compound containing MnIII or MnIV can, in many instances, exhibit lower stabilities because of the difference in size of the ions. Oxidation to the trivalent or tetravalent state prior to precipitation (or other preparative methodology) ensures that once recovered, the compound is for the most part in a usable form.
Preparation of a divalent manganese compound, with subsequent oxidation treatment (e.g., via steam, gaseous oxygen, concentrated liquid oxidizer, etc.) to convert the compound to a trivalent or tetravalent oxidation state, can degrade the ligand or the entire compound, or can alter substituent groups on that ligand. Trivalent or tetravalent manganese/valence stabilizer complexes having a melting temperature lower than approximately 50° C. can be produced as a low melting solid, or a liquid-phase inhibitor. They can also be combined with inert materials in order to provide a solid material. If combination with inert materials is desired, then the trivalent or tetravalent corrosion inhibiting compound can be absorbed into, or adsorbed onto, the surfaces of the inert particles. The particles can be inorganic (e.g., oxides, hydroxides, phosphates, borates, silicates, carbonates, aluminates, titanates, molybdates, tungstates, oxalates, polymers, or combinations thereof) or organic (e.g., polymeric) in nature.
If low solubility or insoluble MnIII or MnIV compounds are desired, then calcining, heating, or firing of mixtures of compounds in an oxidizing environment represents the simplest route to formation. Firing temperatures of between about 200 and about 1200° C. typically can be used depending upon the specific composition. MnII, MnIII, MnIV, or even MnVII precursors can be used for this preparation. Suitable oxidizing environments include oxygen, air, ozone, nitrogen oxides, sulfur oxides, chlorine, fluorine, or combinations thereof.
Once synthesized, the pigments can then be incorporated into a wide range of binder systems to afford corrosion protection. Examples of organic binder systems that can incorporate MnIII or MnIV corrosion-inhibiting pigments include, but are not limited to: alkyd-type primers, acrylic primers, polyester primers, epoxy primers, conductive primers, organic sol-gels, ketimine coatings, polyvinyl coatings, acrylic thermoplastics, asphaltic and coal tar thermoplastics, polyamide thermoplastics, polyethylene dispersion thermoplastics, fluorocarbon thermoplastics, chlorocarbon thermoplastics, silicone thermosets, polyurethane thermosets, polyester thermosets, epoxy-amine thermosets, epoxy-amide thermosets, epoxy-ester thermosets, epoxy-coal tar thermosets, furane thermosets, phenolic thermosets, butadiene styrene elastomers, chlorinated rubber elastomers, polysulfonated elastomers, neoprene elastomers, sulfur-containing rubbers, or combinations thereof. Examples of inorganic binder systems that can incorporate MnIII or MnIV pigments include, but are not limited to: low temperature enamels, low temperature glass frits, carbonaceous coatings, zeolites, inorganic sol-gels, or combinations thereof.
EXAMPLES
In order that the invention may be more readily understood, reference is made to the following examples, which are intended to illustrate the invention, but not limit the scope thereof.
1) Wash Primer Preparation
The corrosion inhibiting performance of MnIII and MnIV pigments was evaluated by incorporating them into primer paint formulations. The acid wash primer paint formulation called out in DoD-P-15328 [Primer (Wash), Pretreatment (Formulation No. 117 for Metals)] was used to test the synthesized pigments. The wash primer is composed of a resin, an acid, a corrosion inhibiting pigment, powdered talc, and carbon lampblack. The acid content of this wash primer provides a rigorous initial test of the stability and performance of the pigments. Other, more benign, polymer-based binder and resin systems might not separate the compounds based on their performance as effectively or as rapidly.
The base solution for the wash primer in this specification was prepared by mixing 88.3 grams of isopropanol, 31.3 grams of n-butanol, and 3.8 grams of deionized water with 14 grams of poly(vinyl butyral) resin (PVB) (Monsanto Butvar B-90TM). PVB was used exclusively throughout testing to avoid preparation and compositional complications during analysis of pigment performance. However, the invention is not limited to the use of PVB.
Acid diluent was prepared by mixing 70 grams of 85% phosphoric acid, 63 grams of deionized water, and 247 grams of isopropanol. Finely-ground pigment powder was measured out and added to 13.74 grams of the base solution for each paint to be tested. A small amount (0.2 g) of powdered talc (magnesium silicate) “filler” was added. Lampblack was not added to these samples. These components were mixed thoroughly by hand and 3.8 g of phosphoric acid diluent added with further mixing. This rough processing allowed direct comparisons of pigment performance to be made without complications due to powder treatments, modifications, and additives.
For each pigment to be tested, the primer paint was applied onto 10 metal substrates—5 precleaned 7075-T6 and 5 precleaned 2024-T3 aluminum substrates. This is not the conventional paint application procedure for aluminum alloys. Under normal service conditions, aluminum alloys are first subjected to a hexavalent chromium-containing conversion coating prior to primer application. However, the conversion coating was omitted so that the performance of the pigment alone could be evaluated and not the synergistic effects of hexavalent chromium (in the conversion coating) or even of barrier films (in the phosphate or anodized coatings).
Multiple samples of specific pigment compositions were prepared and tested. Samples treated with zinc and strontium chromate were used as comparison standards. The chromate pigments were prepared identically to those used to test MnIII and MnIV composition variations.
2) Corrosion Testing
PVB wash primers containing various pigment formulations were evaluated by exposing them to static salt fog (ASTM B-117) and cyclic ProhesionTM (ASTM G-85.5) accelerated corrosion tests. ASTM B-117 is a traditional corrosion “proof” test that has little relation to a real working environment. This accelerated corrosion test exposes samples to a constant salt-water fog and is a de facto test of solubility for corrosion inhibitors. B-117 does not necessarily test the ability of a corrosion inhibitor to actually inhibit corrosion. This is particularly true of inhibitors and compounds that have not been fully optimized with respect to solubility. ASTM G-85.5 (ProhesionTM) is a cyclic corrosion test that more closely resembles real working environments. This accelerated corrosion test exposes samples to a cycle of fog of dilute salt and ammonium sulfate at room temperature followed by forced-air drying at an elevated temperature. This is a more realistic test of the ability of a compound to inhibit corrosion. Results of these tests can be combined to gain insight into how a particular coating or compound will perform relative to a standard as well as helping identify strengths and weaknesses in the performance of the material.
3) Rating Method
ASTM D-1654 evaluation standard for painted or coated specimens subjected to corrosive environments was used to evaluate the performance of the coatings. After the paint dried for 24 hours, each plate was scribed with an X and the plate edges were sealed with PVC tape to eliminate corrosion edge effects.
Two visual observations are associated with this rating test. Procedure A involves a rating of the failure at the scribe—the representative creepage of corrosion away from the scribe. Procedure B involves a rating of the failure in the unscribed areas in terms of the percentage which shows corrosion coming through the film. In this way, not only the bulk corrosion-inhibiting action of a pigment through the binder can be rated, but also its “throwing power”.
4) Comparison Examples
Zinc and strontium chromates are commercial CrVI-based pigments used extensively to provide corrosion protection to metal surfaces. These pigments were used as performance baselines to determine the effectiveness of permanganate-based pigment compositions developed using the methodology described in this specification.
Chromate pigments were precipitated from aqueous solutions and incorporated into PVB wash primer formulations so that each primer sample had the same molar quantity of hexavalent chromium. These primers were then applied to 2024-T3 and 7075-T6 aluminum alloy samples. After the samples had dried for 24 hours, they were scribed and the edges of each sample taped to eliminate edge effects. These samples were then exposed to 168 hours of both ASTM B-117 and G-85.5. Magnesium chromate is so soluble in aqueous solution that the resin began to cross-link immediately, even before the phosphoric acid diluent was added to the PVB pigment mixture. PVB based paints containing magnesium chromate pigments performed well initially (the first 4 days of the test) but began to degrade rapidly as the chromate was depleted. Insoluble bismuth chromate appeared to enhance the effects of corrosion and performed worse than PVB samples that contained no pigment. Zinc and strontium species with intermediate aqueous solubility provided the greatest corrosion inhibition of the chromate pigments when used in the PVB wash primer.
Table 7 presents the accelerated corrosion testing results for bare 2024-T3 and 7075-T6 aluminum alloy test panels treated with PVB combined with zinc and strontium chromate corrosion inhibiting pigments. For each pigment, the first row shows the results on 2024-T3, and the second row shows the results on 7075-T6. The zinc and strontium chromate treated samples performed well during their period of exposure as is expected from the current state-of-the-art. Minor differences in performance as a function of substrate composition were noted.







TABLE 7







Zinc and Strontium Chromate Pigment Accelerated Corrosion Test Results













2024-T3
7075-T6
2024-T3
7075-T6




B-117
B-117
G-85
G-85
Hours
















Stabilizer
Proc. A
Proc. B
Proc. A
Proc. B
Proc. A
Proc. B
Proc. A
Proc. B
168



















Zn as 1.35 g
10
9
9
9
10
9
9
9
168


zinc


chromate



10
9
9
9
10
9
9
9
168


Sr as 1.51 g
9
9
9
9
9
9
9
9
168


strontium


chromate



9
9
9
8
9
9
9
9
168





Evaluated by using ASTM D-1654 - Painted or Coated Specimens Subjected to Corrosive Environments.






5) MnIII and MnIV Pigments in PVB Resin
MnIII- and MnIV-valence stabilizer compounds were synthesized using either published literature procedures, or standard organometallic synthesis techniques because optimized MnIII and MnIV corrosion-inhibiting pigment materials are not commercially available. The pigment syntheses were mainly aqueous-based precipitation techniques, although some pigments (i.e., those using some selected organic valence stabilizers) needed alcohol/water mixtures for the synthesis due to the low solubility of the valence stabilizer compound in pure water. Table 8 shows the MnIII- and MnIV-valence stabilizer combinations used for these optimized manganese-containing paints. As can be seen in Table 8, MnIII and MnIV pigments containing both inorganic and organic valence stabilizers were formed.







TABLE 8







Optimized Trivalent and Tetravalent Manganese Pigments Prepared











Synthesis
Addendum



Pigment
Solvent
Ions
Synthesis Notes





Mn+3/phosphotungstate
H2O
Sr, Ca
Other salts (Mg, Ba, &


[11-tungstophospho-


Zn) not formed


manganate(III)]


Mn+3/molybdate [9-
H2O
Mg, Ca, Zn, Sr, Ba
All salts readily formed.


molybdo-manganate(III)]


Mn+3/iodate [Hexaiodato-
H2O
H, Ca, Zn, Sr, Ba
H (acid) salt precip. from


manganate(III)]


mother liq.; precip. of Ca,





Zn, Sr, and Ba salts; Mg





salt not formed


Mn+3/vanadate [13-
H2O
Na, Mg, Ca, Zn, Sr,
Na salt precip. from


vanado-manganate(III)]

Ba
mother liq.


Mn+4/Diethyldithio-
H2O
SO4−2, PO4−3, WO4−2,


carbamate

MoO4−2,




phosphomolybdate


Mn+3/2-Mercapto-
i-PrOH/H2O
SO4−2
SO4−2 fm. from mother liq.


benzimidazole


Mn+3/8-Hydroxy-
i-PrOH/H2O
SO4−2, PO4−3
SO4−2 fm. from mother


quinoline


liq.; PO4−3 on anion addn.









Table 9 presents the accelerated corrosion testing results for bare 2024-T3 and 7075-T6 aluminum alloy test panels treated with inorganically stabilized MnIII and MnIV pigments in PVB, while Table 10 shows some organically stabilized manganese pigments. Table 9 shows the samples that were produced, as well as the pigment contained within them. Note that the molar concentration of MnIII or MnIV in these paints is much less than that in the zinc chromate primers (7.44×10−3 M). This was done because the molecular weight of the MnIII or MnIV compounds exceeds that of zinc chromate, implying that a much larger mass would be necessary to achieve equal molar concentrations of MnIII or MnIV and CrVI. As can be seen in the corrosion exposure results, even with these much lower molar concentrations of MnIII or MnIV, the “optimized” pigments provided comparable or substantial corrosion protection compared to chromium. These pigments also outperformed by a significant margin those pigments (i.e., molybdates, tungstates, phosphates, borates, cyanamides) containing no inherent oxidizer properties. For each pigment, the first row shows the performance of one sample under the specified conditions, and the second shows the performance of a duplicate sample under the same conditions. It is also interesting to note the change in performance for the MnIII/MnIV pigments just by altering the solubility control agents.







TABLE 9







Inorganically Stabilized MnIII and Mn IV Wash Primers Formulations













Stabilizer/








Solubility Control
Inhibitor
B-117
B-117
G-85
G-85


Agent
Conc. (M)
Proc. A
Proc. B
Proc. A
Proc. B
Hours




















Ca as 1.42 g calcium
7.44 × 10−4
6
3
5
4
6
5
7
6
117


9-molybdomanganate
(10% of Cr)




6
3
5
4
6
5
7
6
117


Zn as 1.48 g zinc 9-
7.44 × 10−4
5
3
5
4
7
7
7
7
117


molybdomanganate
(10% of Cr)
5
3
5
4
7
7
7
7
117




5
3
5
3
7
6
8
7
117


Sr as 1.53 g strontium
7.44 × 10−4
5
—
4
—
6
5
6
5
117


9-molybdomanganate
(10% of Cr)




5
—
5
—
6
5
6
5
117


Ba as 1.64 g barium 9-
1.64 × 10−4
4
—
3
—
7
6
8
7
117


molybdomanganate
(10% of Cr)




4
—
3
—
7
6
7
6
117


Ba as 2.06 g barium
1.49 × 10−3
5
3
5
3
7
7
8
8
144


hexaiodatomanganate
(20% of Cr)




5
3
5
3
8
8
7
7
144


Mg as 1.28 g
7.44 × 10−4
9
7
7
8
7
6
6
5
139


magnesium 13-
(10% of Cr)


vanadatomanganate




9
7
7
8
7
6
7
6
139


Ca as 1.32 g calcium
7.44 × 10−4
8
7
7
6
7
6
7
6
139


13-
(10% of Cr)


vanadatomanganate




8
7
7
6
7
6
7
6
139


Zn as 1.37 g zinc 13-
7.44 × 10−4
8
9
7
8
7
6
7
6
139


vanadatomanganate
(10% of Cr)




8
9
7
8
7
5
6
5
139


Sr as 1.42 g strontium
7.44 × 10−4
7
6
7
6
6
5
6
5
139


13-
(10% of Cr)


vanadatomanganate




7
6
7
6
6
6
6
6
139


Ba as 1.53 g barium
7.44 × 10−4
7
8
7
6
6
6
6
5
139


13-
(10% of Cr)


vanadatomanganate




7
7
7
6
7
6
6
5
139





Evaluated by using ASTM D-1654 - Painted or Coated Specimens Subjected to Corrosive Environments.













TABLE 10







Organically Stabilized MnIII and Mn IV Wash Primers Formulations













Stabilizer/








Solubility Control
Inhibitor
B-117
B-117
G-85
G-85



Agent
Conc. (M)
Proc. A
Proc. B
Proc. A
Proc. B
Hours





Mn+4/DEDT/
1.49 × 10−3
6
5
7
6
168


sulfate
(20% of Cr)




6
5
7
5
168


Mn+4/DEDT/
1.49 × 10−3
7
5
8
7
168


phosphate
(20% of Cr)




7
5
8
7
168


Mn+4/DEDT/
1.49 × 10−3
7
6
7
5
168


molybdate
(20% of Cr)




7
6
7
5
168


Mn+4/DEDT/
1.49 × 10−3
7
5
7
5
168


tungstate
(20% of Cr)




7
5
7
5
168


Mn+3/MBI/
1.49 × 10−3
7
7
6
6
168


sulfate
(20% of Cr)




8
7
6
6
168


Mn+3/HQ/
1.49 × 10−3
6
5
6
5
168


sulfate
(20% of Cr)




6
5
6
5
168


Mn+3/HQ/
1.49 × 10−3
7
6
8
7
168


phosphate
(20% of Cr)




7
6
8
7
168





Evaluated by using ASTM D-1654 - Painted or Coated Specimens Subjected to Corrosive Environments.


DEDT = diethyldithiocarbamate,


MBI = mercaptobenzimidazole,


HQ = hydroxyquinoline






Table 10 shows the results for a few of the organic valence stabilizers evaluated. Due to low substrate supplies, these pigments were only tested on duplicate 2024-T3 aluminum alloy under both ASTM B-117 and G-85 conditions. The molar concentration of MnIII and MnIV in these pigments were also much less than in the standard chromate pigments. Clear progressions in the performance of these pigments as a function of anionic solubility control agents were also observed.

6) Calcined MnIII and MnIV Pigments
Calcined MnIII and MnIV pigments were prepared by mixing oxides, hydroxides, or peroxides of Mg, Ca, Sr, Ba, Zn, Bi, Co, Ni, or Fe with manganese oxides such as Mn2O3 or MnO2 and firing in air for up to four hours between 400 and 715° C.±10° C. The ceramic oxide pigments were mixed 1:1 by weight with boiled linseed oil. This mixture was painted on to bare 1008 carbon steel sheet that had been prepared with an alkaline cleaning treatment. An identical steel specimen was painted with red-lead (Pb3O4) and boiled linseed for use as a comparison standard. The painted test panels were allowed to dry for 48 hours, X scribed completely through the coating, and then exposed to ASTM B117 for 41 hours.
The Ca-, Zn-, and Sr-containing pigments demonstrated corrosion inhibition performance equal to that of the of the red lead pigments in a side by side comparison. The Ba-containing pigment performed nearly as well as Ca, Zn, and Sr formulations by providing a high degree of surface protection but not quite as good as the red lead standard.
Chromium- or lead-free pigments based on MnIII and/or MnIV which can be used as replacements for the current CrVI or PbIV pigments can be made. Many synthesis methodologies and procedures are available for those skilled in the art of coordination compound synthesis to produce a multitude of MnIII and/or MnIV corrosion inhibiting pigments. One or two synthesis procedures or solvents are likely to be typical for specific MnIII- or MnIV-valence stabilizer combinations. The methodology described in this specification encompasses the entire range of valence stabilized MnIII or MnIV pigment formulations.
Pigments formed in accordance with the prior art are not competitive with the present invention. Prior art embodiments require the use of application processes and chemical compounds that do not form pigments containing valence stabilized MnIII- or MnIV-based active corrosion inhibitors that perform equivalent to current effective commercial hexavalent chromium- or tetravalent lead-based pigment systems.
While the invention has been described by reference to certain embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the invention not be limited to the disclosed embodiments, but that it have the full scope permitted by the language of the following claims.

## Claims

1. A corrosion-inhibiting pigment composition comprising:
a corrosion-inhibiting pigment comprising manganese, and an inorganic valence stabilizer combined to form a manganese/valence stabilizer complex, wherein the manganese is in the trivalent oxidation state, tetravalent oxidation state, or combinations thereof in the manganese/valence stabilizer complex, and wherein the manganese/valence stabilizer complex has a solubility in water of between about 1×100 and about 1×10−17 moles per liter of manganese at about 25° C. and about 760 Torr, and wherein the manganese/valence stabilizer complex has a central cavity containing a manganese ion and an additional ion; and
a coating system comprising a carrier system and a binder system, or a carrier system and a resin system, or both,
with the proviso that the valence stabilizer is not oxygen or hydroxide.

2. The pigment composition of claim 1 wherein the solubility of the manganese/valence stabilizer complex in water is between about 1×10−1 and about 1×10−4 moles per liter of manganese at about 25° C. and about 760 Torr.

3. The pigment composition of claim 1 wherein the solubility of the manganese/valence stabilizer complex in water is between about 1×10−1 and about 1×10−4 moles per liter of manganese at about 25° C. and about 760 Torr.

4. The pigment composition of claim 1 wherein the solubility of the manganese/valence stabilizer complex in water is between about 1×10−9 and about 1×10−17 moles per liter of manganese at about 25° C. and about 760 Torr.

5. The pigment composition of claim 1 wherein there is an electrostatic barrier layer around the manganese/valence stabilizer complex in aqueous solution.

6. The pigment composition of claim 1 wherein the manganese/valence stabilizer complex acts as an ion exchange agent towards corrosive ions.

7. The pigment composition of claim 1 wherein the manganese/valence stabilizer complex decomposes above about 100° C.

8. The pigment composition of claim 1 wherein the manganese/valence stabilizer complex melts above about 50° C.

9. The pigment composition of claim 1 wherein the inorganic valence stabilizer is selected from molybdates, tungstates, vanadates, niobates, tantalates, tellurates, periodates, iodates, antimonates, stannates, sulfates, polyphosphates, titanates, zirconates, bismuthates, germinates, carbonates, arsenates, phosphates, borates, aluminates, silicates, or combinations thereof.

10. The pigment composition of claim 1 wherein the additional ion is B+3, Al+3, Si+4, P+5, Ti+4, V+5, V+4, Cr+6, Cr+3, Mn+2, Fe+3, Fe+2, Co+2, Co+3, Ni+2, Ni+3, Ni+4, Cu+2, Cu+3, Zn+2, Ga+3, Ge+4, As+5, As+3, Zr+4, or Ce+4.

11. The pigment composition of claim 1 further comprising a solubility control agent.

12. The pigment composition of claim 11 wherein the solubility control agent is a cationic solubility control agent or an anionic solubility control agent.

13. The pigment composition of claim 12 wherein the solubility control agent is the cationic solubility control agent selected from H+; Li+; Na+; K+; Rb+; Cs+; NH4+; Mg+2; Ca+2; Sr+2; Be+2; Ba+2; Y+3; La+3; Ce+3; Ce+4; Nd+3; Pr+3; Sc+3; Sm+3; Eu+3; Eu+2; Gd3; Tb+3; Dy+3; Ho+3; Er+3; Tm+3; Yb+3; Lu+3; Ti+3; Zr+4; Ti+3; Hf+4; Nb+5; Ta+5; Nb+4; Ta+4; V+5; V+4; V+3; Mo+6; W+6; Mo+5; W+5; Mo+4; W+4; Cr+3; Mn+2; Mn+3; Mn+4; Fe+2; Fe+3; Co+2; Co+3; Ni+2; Ni+3; Ni+4; Ru+2; Ru+3; Ru+4; Rh+3; Ir+3; Rh+2; Ir+2; Pd+4; Pt+4; Pd+2; Pt+2; Os+4; Cu+; Cu+2; Cu+3; Ag+; Ag+2; Ag+3; Au+; Au+2; Au+3; Zn+2; Cd+2; Hg+; Hg+2; Al+3; Ga+3; Ga+; In+3; In+; Tl+3; Tl+; Ge+4; Ge+2; Sn+4; Sn+2; Pb+4; Pb+2; Sb+3; Sb+5; As+3; As+5; Bi+3; Bi+5; organic compounds containing at least one N+ site; organic compounds containing at least one phosphonium site; organic compounds containing at least one arsonium site; organic compounds containing at least one stibonium site; organic compounds containing at least one oxonium site; organic compounds containing at least one sulfonium site; organic compounds containing at least one selenonium site; organic compounds containing at least one iodonium site; quaternary ammonium compounds having a formula NR4+, where R is an alkyl, aromatic, or acyclic organic constituent; or combinations thereof.

14. The pigment composition of claim 12 wherein the solubility control agent is the anionic solubility control agent selected from fluorotitanates, chlorotitanates, fluorozirconates, chlorozirconates, fluoroniobates, chloroniobates, fluorotantalates, chlorotantalates, molybdates, tungstates, permanganates, fluoromanganates, chloromanganates, fluoroferrates, chloroferrates, fluorocobaltates, chlorocobaltates, fluorozincates, chlorozincates, borates, fluoroborates, fluoroaluminates, chloroaluminates, carbonates, silicates, fluorosilicates, fluorostannates, nitrates, nitrites, azides, cyanamides, phosphates, phosphites, phosphonates, phosphinites, thiophosphates, thiophosphites, thiophosphonates, thiophosphinites, fluorophosphates, fluoroantimonates, chloroantimonates, sulfates, sulfites, sulfonates, thiosulfates, dithionites, dithionates, fluorosulfates, tellurates, fluorides, chlorides, chlorates, perchlorates, bromides, bromates, iodides, iodates, periodates, heteropolyanions, ferricyanides, ferrocyanides, cyanocobaltates, cyanocuprates, cyanomanganates, cyanates, cyanatoferrates, cyanatocobaltates, cyanatocuprates, cyanatomanganates, thiocyanates, thiocyanatoferrates, thiocyanatocobaltates, thiocyanatocuprates, thiocyanatomanganates, cyanamides, cyanamidoferrates, cyanamidocobaltates, cyanamidocuprates, cyanamidomanganates, nitritoferrates, nitritocobaltates, azides, (thio)carboxylates, di(thio)carboxylates, tri(thio)carboxylates, tetra(thio)carboxylates, (thio)phenolates, di(thio)phenolates, tri(thio)phenolates, tetra(thio)phenolates, (thio)phosphonates, di(thio)phosphonates, tri(thio)phosphonates, (thio)phosphonamides, di(thio)phosphonamides, tri(thio)phosphonamides, amino(thio)phosphonates, diamino(thio)phosphonates, triamino(thio)phosphonates, imino(thio)phosphonates, diimino(thio)phosphonates, (thio) sulfonates, di(thio) sulfonates, tri(thio)sulfonates, (thio) sulfonamides, di(thio) sulfonamides, tri(thio) sulfonamides, amino(thio) sulfonates, diamino(thio)sulfonates, triamino(thio) sulfonates, imino(thio) sulfonates, diimino(thio) sulfonates, (thio)borates, di(thio)borates, (thio)boronates, organic silicates, stibonates, cyanides, cyanochromates, cyanonickelates, cyanatochromates, cyanatonickelates, thiocyanatochromates, thiocyanatonickelates, cyanamidochromates, cyanamidonickelates, nitritonickelates, arsonates, diarsonates, triarsonates, organic selenates, diselenates, triselenates, arsenates, arsenites, fluoroarsenates, chloroarsenates, selenates, selenites, fluorothallates, chlorothallates, iodomercury anions, chloromercurates, bromomercurates, osmates, fluoronickelates, chromates, Reinecke' s salt, vanadates, or combinations thereof.

15. The pigment composition of claim 1 wherein the manganese/valence stabilizer complex is adsorbed or precipitated onto an inert medium selected from oxides, hydroxides, phosphates, borates, silicates, carbonates, aluminates, titanates, molybdates, tungstates, oxalates, polymers, or combinations thereof.

16. The pigment composition of claim 1 wherein the pigment is colored.

17. The pigment composition of claim 1 wherein the pigment exhibits a color change between the trivalent or tetravalent manganese oxidation states and the divalent manganese oxidation state.

18. The pigment composition of claim 1 wherein the pigment is light-fast.

19. A corrosion-inhibiting pigment composition comprising:
a corrosion-inhibiting pigment comprising manganese, and an inorganic valence stabilizer combined to form a manganese/valence stabilizer complex, wherein the manganese is in the trivalent oxidation state, tetravalent oxidation state, or combinations thereof in the manganese/valence stabilizer complex, and wherein the manganese/valence stabilizer complex has a solubility in water of between about 1×100 and about 1×10−17 moles per liter of manganese at about 25° C. and about 760 Torr and wherein the manganese/valence stabilizer complex is adsorbed or precipitated onto an inert medium selected from oxides, hydroxides, phosphates, borates, silicates, carbonates, aluminates, titanates, molybdates, tungstates, oxalates, polymers, or combinations thereof; and
a coating system comprising a carrier system and a binder system, or a carrier system and a resin system, or both,
with the proviso that the valence stabilizer is not oxygen or hydroxide.