bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Structures of trans-Dichloro- and trans-Bis(isothiocyanato)nickel(II) Complexes with 1,4,8,11-Tetraazacyclotetradecane, 1,4,8,12-Tetraazacyclopentadecane, and 1,5,9,13-Tetraazacyclohexadecane. The Negative Correlation between the Axial and In-plane Coordination Bond Lengths in Tetragonal Ni(II) Complexes of the trans-NiX2N4 Type
Authors: Ito Tasuku , Kato Masako , Ito Haruko 
Published: July 2006

Abstract
The molecular structures of the six titled compounds, which contain 14-membered, 15-membered, or 16-membered tetraazamacrocyclic ligands, have been determined by single crystal X-ray analyses. On going from smaller to larger rings, the average in-plane Ni–N distance increased by 0.05–0.06 Å for each ring member added. For a series of complexes with given axial ligands (X), the mean axial coordination bond length (Ni–X) was found to decrease as the average in-plane distance (Ni–N) increased. The degree of the negative correlation was stronger for complexes with weaker axial ligands (Cl−) than for those having stronger axial ligands (NCS−). Similar negative interrelationships between the Ni–X and Ni–N distances have been found for complexes which have the same in-plane macrocyclic ligand, but different axial ligands. The molecular stereochemistries of the complexes have been discussed. For all the complexes with the 1,4,8,12-tetraazacyclopentadecane ligand, a structural disorder of the same type has been found: gauche five-membered and skew six-membered chelate rings are randomly interchanged in the crystal. This arises mainly from the similarity of the bite angles of the five- and six-membered chelate rings in the gauche and the skew conformations respectively.
Intramolecular Photocycloaddition of Noncyclic Polyether Compounds Containing α,ω-Dicinnamates End Groups and Uptake of Alkali Metal Thiocyanates with Them
Authors: Hiratani Kazuhisa , Aiba Sei-ichi 
Published: July 2006

Abstract
Noncyclic polyethers containing two cinnamoyl end groups have been prepared, they were cyclized by photosensitized intramolecular addition. The uptake of alkali metal (sodium and potassium) thiocyanates with these compounds and their ability to extract has been investigated before and after the cyclization.
Zeta Potentials of Metal Oxides in Aqueous Solution of Water-soluble Titanate Coupling Agents
Authors: Esumi Kunio , Meguro Kenjiro 
Published: July 2006

Abstract
The zeta potentials of γ-Fe3O4 and TiO2 were measured as a function of the amount of water-soluble titanate coupling agents added in aqueous solution. Compared with untreated samples, the zeta potential of γ-Fe3O4 increased negatively with an increase of the amount of water-soluble titanate coupling agents, while that of TiO2 changed little. Furthermore, after a washing process, it was confirmed by ESCA measurement that a certain amount of water-soluble titanate coupling agent still remained on the surface of the γ-Fe3O4.
cDNA Sequences and Molecular Evolution of Calmodulin Genes of Chicken and Eel
Authors: Iida Yôichi 
Published: July 2006

Abstract
c DNA sequences of calmodulin genes taken from chicken and eel were compared to investigate the molecular evolution of its protein. One notable feature of the amino acid coding region of the gene is that the second positions of codons are more conservative than the first positions, while the third positions are highly diverged to exhibit almost saturation. This kind of behaviour is reminiscent of that of the histone gene.
Preparation of Sodium Bis(l-aspartato)rhodate(III)
Authors: Watabe Masatoshi , Furihata Kenji , Odaka Yoshio 
Published: July 2006

Abstract
Bis(l-aspartato) rhodate(III) complex was prepared and separated into three isomers, and their absorption, CD curves and 1H NMR spectra are presented. The geometrical configurations of three isomers are assigned mainly on the basis of the spectral analogy between this complex and the [Co(l-asp)2]− complex.
Extractive Separation of Osmium and Ruthenium from Thiocyanate Media
Authors: Jaya Sambamoorthy , Ramakrishna Tiruvesaloor V 
Published: July 2006

Abstract
The sequential separation of osmium and ruthenium as thiocyanate complexes by extraction into mesityl oxide and cyclohexanone is described. The conditions for their re-extraction prior to determination from the respective organic layers have been established. Alternatively, the amounts of osmium and ruthenium were established spectrophotometrically from the coloured mesityl oxide and cyclohexanone layers respectively. The developed procedure has been applied to the separation of these metals present in synthetic samples of various minnerals.
The Preparation of Pyridinium μ-Oxo-bis[nitrilotriacetatodioxomolybdate(VI)] and Pyridinium Di-μ-oxo-bis[nitrilotriacetatooxomolybdate(V)] Monohydrate and the X-ray Structure of the Molybdenum(VI) Complex
Authors: Matsumoto Keiji , Marutani Yoshiaki , Ooi Shun-ichiro 
Published: July 2006

Abstract
Nitrilotriacetato complexes of MoVI and MoV were prepared and the X-ray structure of the former complex is described. On the basis of the UV-visible and IR spectra and elemental analyses, the latter complex is formulated as (pyH)2[Mo2O4(ntaH)2]·H2O.
Conversion of Alcohols into Haloalkanes in Tertiary Phosphine/Methyl Halide/4-Methyl-1,2,4-triazolidine-3,5-dione (MTAD) System
Authors: Oshikawa Tatsuo , Yamashita Mitsuji 
Published: July 2006

Abstract
Alcohols were succesfully converted to the corresponding alkyl halides using the betaine provided by tertiary phosphine/4-methyl-1,2,4-triazolidine-3,5-dione (MTAD) system. Stereospecific reaction involving inversion of configuration on the carbon atom (SN2 reaction) was clarified.
A Novel Route to N-Phenyl-C-(trifluoromethyl)nitrilimine from 3-Phenyl-5-trifluoromethyl-2,3-dihydro-1,3,4,2-oxadiazaphosphole
Authors: Tanaka Kiyoshi , Igarashi Toh-ru , Maeno Seiji , Mitsuhashi Keiryo 
Published: July 2006

Abstract
Thermolysis of 3-phenyl-5-trifluoromethyl-2,2,2-tris-(p-tolyloxy)-2,3-dihydro-1,3,4,2-oxadiazaphosphole in the presence of various olefins gave the 1,3-dipolar cycloadducts of N-phenyl-C-(trifluoromethyl)nitrilimine in situ formed. The similar decomposition in aniline afforded N-phenyltrifluoroacetamide phenylhydrazone.
The X-Ray Fluorescence Spectroscopy of Inorganic Solids. VII. The Fe Kβ1,3 Energy Shifts in Oxide Glasses
Authors: Yoshioka Michiko , Maekawa Takashi , Yokokawa Toshio 
Published: July 2006

Abstract
The Fe Kβ1,3 energy shifts in the binary sodium borate, silicate, and phosphate glasses containing small amounts of the iron ion were examined. The Fe Kβ1,3 energy decreases with an increase in the sodium oxide content in the borate and silicate glasses. The data are in accordance with those of previous studies that the coordination number of the Fe(III) ion is four in the borate and silicate glasses and six in the phosphate glasses. The structure of the coordination sphere around the Fe(III) ion in the borate glasses was also discussed.
Syntheses, and Crystal and Molecular Structures of Tris(benzamide)bis(O,O′-diisopropyl dithiophosphato)lanthanoid(III) O,O′-Diisopropyl Dithiophosphate (M=Gd, Tb, Dy, Er, and Yb)
Authors: Nagai Kiyofumi , Nakamura Reiko , Shimoi Mamoru , Ouchi Akira 
Published: July 2006

Abstract
Five isomorphous lanthanoid(III) complexes were synthesized, and the structure of the terbium (1) and erbium (2) complexes were determined by the use of the single-crystal X-ray diffraction method. Crystals of 1 and 2 are monoclinic, with the space group P21/n, and the cell constants are: (1) a=25.076(8), b=15.446(3), c=14.579(8) Å, β=100.77(4)°; (2) a=25.036(20), b=15.228(4), c=14.805(19) Å, β=99.50(12)°. The structures were solved by the heavy-atom method and refined by the block-diagonal least-squares method. The final R values of 1 and 2 are 0.061 and 0.055 respectively. They consist of discrete complex cations and dithiophosphate anions. The central metal atom of the cationic complex is hepta-coordinated, and it is in a pentagonal bipyramidal geometry, where four sulfur atoms of two dithiophosphate ions and one oxygen atom of a benzamide ligand take the equatorial positions, while two benzamide oxygen atoms are in the axial positions.
Ion Exchange from a Nonaqueous Solution. Zinc (II) Bromide and Iodide in Ethylene Glycol
Authors: Kumagai Tetsu 
Published: July 2006

Abstract
The distribution behavior of the zinc ion in sodium bromide and iodide solutions between the cation-exchange resin for forced-flow liquid chromatography and the absolute or aqueous ethylene-glycol phase was investigated radiometrically. From the experimental data, consecutive complex formation constants for zinc bromide and iodide in the glycol have been calculated by the nonlinear least-squares method. The results are as follows: in absolute glycol β1Br=2.60 and β2Br=3.91 for zinc bromide, β1I=2.36 and β2I=3.04 for zinc iodide; in 5 wt% aqueous glycol β1Br=2.30, β2Br=3.32, and in 10 wt% aqueous glycol, β1Br=1.87, β2Br=2.78, respectively.
Development of a Laboratory EXAFS System and Its Application to Aqueous Nickel(II) Ammine Solutions
Authors: Sano Mitsuru , Maruo Tetsuya , Yamatera Hideo 
Published: July 2006

Abstract
A laboratory EXAFS system with a curved crystal has been developed. This apparatus consists of a usual X-ray tube, a spectrometer with a Johan-type curved crystal, and two proportional counters detecting the X-rays. The resolution and performance tests have been carried out and excellent spectra have been obtained for NiO. With this system, aqueous solutions of ammine and ethylenediamine nickel(II) salts have been studied. The spectra were analyzed by the curve-fitting method by reference to the spectra of appropriate crystals containing the corresponding complexes. The values obtained for the Ni–N distances are 2.12±0.01 Å. These values are very close to those of the corresponding complexes in crystals.
Stereocontrolled Synthesis of (±)-Asperlin and Related Stereoisomers Using Organotitanium Reagent
Authors: Hiraoka Hiroaki , Furuta Kyoji , Ikeda Nobuo , Yamamoto Hisashi 
Published: July 2006

Abstract
The naturally occurring antibiotics asperlin and related fungal metabolites containing a 5,6-dihydro-2-pyrone moiety have been synthesized stereoselectively. The propargyltitanium reagent derived from 1-trimethylsilyl-3-(tetrahydropyranyloxy)propyne condensed with crotonaldehyde affords the corresponding erythro alcohol as the major product, which is converted to (±)-asperlin and the related three stereoisomers in seven steps.
Adsorption of Oligomer Type Surfactants on Iron Oxide
Authors: Esumi Kunio , Ogihara Kimihiko , Meguro Kenjiro 
Published: July 2006

Abstract
Adsorption of oligomer type surfactants synthesized from acrylic acid, acrylonitrile, and 1-dodecanethiol on α-Fe2O3 was examined by measuring adsorption isotherms and zeta potentials. It was found that the adsorption behavior of oligomer type surfactants on α-Fe2O3 was influenced by the pH of suspensions and further by the differences of composition of oligomer type surfactants.
Electrodic Properties and Surface Characteristics of Ni–V Alloys for Water Electrolysis Cathode Materials
Authors: Machida Ken-ichi , Enyo Michio , Oguro Keisuke , Nakane Masanori 
Published: July 2006

Abstract
Hydrogen evolution reaction on a series of hydrogen absorbing Ni–V alloys, viz. Ni2V, NiV, and NiV3, before and after pretreatments with aq HF was studied in 1 M NaOH (1 M=1 mol dm−3) at 288–333 K by a galvanostatic overpotential transient technique. Results are related with the surface characteristics revealed by XPS techniques. It is concluded that the Ni in the Ni–V alloys is mainly responsible for their electrochemical properties and that the reaction proceeds via the Volmer-Tafel reaction route with mixed rate-determining characteristics: The activation heats are 7.7, 6.8, and kcal mol−1 (1 cal=4.184 J) for two elementary steps, Volmer and Tafel, and the overall reaction, respectively. The electrocatalytic activity of the Ni–V alloys, particularly NiV3, is drastically enhanced through the treatment with aq HF, and this is in parallel with the formation of porous Ni layers on their surface, namely the increase of the effective surface area. Potentiality of the alloys for water electrolysis cathode materials is indicated by a higher electrocatalytic activities of the Ni–V alloys over ordinary Raney nickel electrodes. Hydrogen absorbability of the alloys was also investigated: NiV3 stored hydrogen up to [H]/[M]=≤0.3 after a cathodic polarization at about −400 mV hydrogen overpotential, but that in Ni2V or NiV was far smaller.
Thermal Square Planar-to-octahedral Transformation of Nickel(II) Complexes Containing 1,2-Diphenyl-1,2-ethanediamine in the Solid Phase
Authors: Ihara Yoshinori , Tsuchiya Ryokichi 
Published: July 2006

Abstract
The following ten nickel(II) complexes with meso- or dl-1,2-diphenyl-1,2-ethanediamine (abbreviated as meso-stien and dl-stien, respectively) were prepared, and their thermal behavior was investigated in the solid phase: [Ni(meso-stien)2]X2 (X=Cl, Br, I, NO3, or ClO4), [Ni(dl-stien)2]X2 (X=I or ClO4), and [Ni(H2O)2(dl-stien)2]X2 (X=Cl, Br, or NO3). The square planar bis(dl-stien) complex chloride, bromide, and nitrate obtained by thermal dehydration of their respective octahedral diaqua complexes were found by various techniques to be transformed, upon further heating, to the octahedral diacido bis(dl-stien) complexes. The complexes containing dl-stien have a stronger tendency to show such structural transformations than those containing meso-stien. The reason for this difference is discussed.
The Thermal Properties of (4-Substituted Cyclohexyl) 4-Substituted Cinnamates
Authors: Hayashi Shigetsugu , Takenaka Shunsuke , Kusabayashi Shigekazu 
Published: July 2006

Abstract
The thermal properties for a homologous series of 4-alkylcyclohexyl 4-alkoxy- and 4-cyanocinnamates are examined. They exhibit nematic phases with low melting points. The effect of the cyclohexyl group on the mesophase stability is discussed.
Syntheses and Chelating Properties of Sulfonamidoquinolines
Authors: Nakamura Hiroshi , Yoshida Tsukasa , Todoko Masaaki , Ueno Keihei , Takagi Makoto 
Published: July 2006

Abstract
Seven chelating agents were synthesized. The complexation properties of these reagents with divalent metals (Cu2+, Co2+, Ni2+, Zn2+) were investigated in dioxane–water (75% dioxane, 25% water), and the complex formation constants were compared with those of 8-quinolinol as a reference chelating agent. These sulfonamidoquinoline reagents formed ML and ML2 type complexes, and the order of complex stabilities followed Irving-Williams’ order except for 2-methyl substituted derivatives. With 2-methyl derivatives, Ni2+ complexes were less stable than Co2+ complexes. Structural characteristics of sulfonamides as chelating agent were discussed in detail.
The Volume Profile for the Aquation Reactions of trans-[CoBr(NO2)(en)2]+ and trans-[CoCl(N3)(en)2]+
Authors: Kitamura Yoichi , Nariyuki Shinji , Kondo Toshiaki 
Published: July 2006

Abstract
For the aquation of trans-[CoBr(NO2)(en)2]+, the activation volume at atmospheric pressure (ΔV\eweq) is 0.3±0.2 cm3 mol−1 at 10 °C, and the reaction volume (ΔV) is −10.4±0.1 cm3 mol−1 at 7.4 °C, both in pure water. For trans-[CoCl(N3)(en)2]+, ΔV\eweq is 0.7±0.6 cm3 mol−1 at 30 °C in 0.011 M HClO4 (1 M=1 mol dm−3) and ΔV is −11.0±0.6 and −11.4±0.3 cm3 mol−1 at 25 °C in 0.008 M HClO4, thus yielding the trans and the cis aqua products respectively.
Fragmentation of Human Erythrocyte Ghosts and Their Application as a Carrier of Heme Complex
Authors: Seki Noriko , Ohno Hiroyuki , Tsuchida Eishun , Sasakawa Shigeru 
Published: July 2006

Abstract
Human erythrocyte ghosts were taken into fragments by sonication. The average radius of the fragmented ghosts gradually decreased with the sonication time. The fragmented ghosts were obtained as spheres and reached to about 0.1 μm. In spite of the change in radius, their membrane fluidity was the same as that of the unsonicated ghost membrane. The [meso-α,α,α,α-tetrakis(o-pivalamidophenyl)porphinato]iron(III)-mono (1-dodecyl-2-methylimidazole) complex was incorporated into the hydrophobic region of the fragmented ghost membrane. This hybrid showed a semistable oxygen adduct in pH 7.0 phosphate buffer solution.
The Platinum Catalyzed Reduction of Nitroarenes to Aminoarenes with Carbon Monoxide and Water
Authors: Watanabe Yoshihisa , Tsuji Yasushi , Ohsumi Tatsuya , Takeuchi Ryo 
Published: July 2006

Abstract
Nitroarenes were transformed into the corresponding aminoarenes in high yields at 80 °C with carbon monoxide (an initial pressure 30–60 kg cm−2) and water in the presence of a catalytic amount of a platinum catalyst. The platinum catalyst was combined with tin(IV) chloride, triphenylphosphine and triethylarnine. This combination was essential for the high catalytic activity.
Cobalt(III) Complexes with Quadridentate Ligands. V. The Preparation and Properties of Paramagnetic and Diamagnetic cis-β2-Isomer of the 5-Nitrosalicylato(quadridentate amine)cobalt(III) Complexes
Authors: Yamamoto Yoshihisa , Kudo Hiroko 
Published: July 2006

Abstract
Several green paramagnetic 5-nitrosalicylato(quadridentate amine)cobalt(III) chloride nitrate hydrates, [Co(5-NO2sal)L]Cl·NO3·nH2O (L: 2,3,2-tet, 3,2,3-tet, and 3,3,3-tet) and the corresponding orange diamagnetic nitrate hydrates, [Co(5-NO2sal)L]NO3·nH2O, have been isolated and characterized by analytical, spectroscopic, and magnetic methods.
Determination of a Small Amount of a Biological Constituent by the Use of Chemiluminescence. II. Determination of Albumin as a Model Protein by Means of the Flow-injection Analysis Using a Cobalt(III) Complex Compound as a Catalyst
Authors: Hara Tadashi , Toriyama Motohiro , Tsukagoshi Kazuhiko 
Published: July 2006

Abstract
A new procedure for the determination of 8×10−9–3×10−7 mol dm−3 bovine serum albumin as a model protein has been established on the basis of the fact that the catalytic activity of cis-tetraamminediaquacobalt(III) sulfate for the chemiluminescent reaction between luminol and hydrogen peroxide decreases in the presence of bovine serum albumin.
Structure and Synthesis of Miyaginin, a p-Allylphenyl Glycoside from Lespedeza thunbergii forma macrantha
Authors: Ojika Makoto , Kuyama Hiroki , Niwa Haruki , Yamada Kiyoyuki 
Published: July 2006

Abstract
The structure of miyaginin previously reported as p-vinylphenyl O-d-xylosyl-(1→6)-d-glucoside without stereochemical assignment of two glycosidic linkages was reinvestigated by spectral and chemical means and shown to be revised as p-allylphenyl O-β-d-xylopyranosyl-(1→6)-β-d-glucopyranoside (p-allylphenyl β-primeveroside). In order to confirm the revised structure, an unambiguous synthesis of miyaginin was performed.
Vacuum Sublimation Behavior of Metal Complexes of Thio-β-diketones. Purification of Manganese(II), Iron(III), Cobalt(III), Nickel(II), Copper(II), Zinc(II), Palladium(II), Silver(I), and Cadmium(II) with 1,1,1-Trifluoro-4-(2-thienyl)-4-mercapto-3-buten-2-one
Authors: Honjo Takaharu , Shima Shigeki 
Published: July 2006

Abstract
A vacuum sublimation apparatus with a continuous temperature gradient (25–260 °C) along the tube (0–50 cm) at 2×10−2 Torr (1 Torr≈133.322 Pa) was used. STTA (1,1,1-trifluoro-4-(2-thienyl)-4-mercapto-3-buten-2-one) and its metal chelates of MnII, FeIII, CoIII, NiII, CuII, ZnII, and PdII sublimed quantitatively without thermal decomposition, while the chelates of AgI and CdII were accompanied by thermal decomposition.
Photoelectrochemical Behavior of the Fe(CN)52− Complexes Coordinated to the Poly(4-vinylpyridine) Film on Graphite Surfaces
Authors: Oyama Noboru , Yamamoto Hisao , Ohsaka Takeo , Kaneko Masao 
Published: July 2006

Abstract
Photoelectrochemical reaction of the Fe(CN)52− complex (PVP[Fe(CN)52−]n) coordinated to the unprotonated poly(4-vinylpyridine) (PVP) film on a graphite electrode was examined in an aqueous solution. It was found that the carbon electrode coated with the PVP[Fe(CN)52−]n generates the long-time responses of the photocurrents under irradiation of visible light and that the mechanism of its photochemical reaction is different from that for the photochemical reaction of [Fe(CN)6]3− in a bulk solution, where the dissociation reaction of [Fe(CN)6]3− to its aqua ion occurs.
Synthesis of Fluorescent Peptides and Their Phosphorylation by the Catalytic Subunit of cyclicAMP-dependent Protein Kinase
Authors: Kondo Hiroki , Takaki Katsunori , Kuroki Ryoichi , Tada Akihiro , Fukumoto Kunihiro , Sunamoto Junzo 
Published: July 2006

Abstract
The following two fluorescent peptides were prepared as substrates of the cyclic AMP-dependent protein kinase reaction: Leu–Arg–Arg–Ala–Ser–Leu–X; 1 (X= 2-(dansylamino)ethylamino or DAE) and 2 (X=4-methyl-2-oxo-7-chromenylamino or MCA). Both peptides were phosphorylated by ATP and the catalytic subunit of cyclidAMP-dependent protein kinase from bovine heart in a stoichiometric manner. Phosphorylation of peptide 1 is accompanied by a 10% increase in the fluorescence intensity at 550 nm. This enables one to assay peptide phosphorylation by fluorescence spectroscopy. The kinetic parameters obtained by this and the conventional phosphocellulose paper method for this phosphorylation were the following: Km 7.8 μM and Vmax 35 μmol·min−1·mg−1 for 1, and Km 7.4μM and Vmax 16 μmol·min−1·mg−1 for 2.
Reaction of Trifluoronitrosomethane with Arenesulfonohydrazides. Synthesis of N-Trifluoromethyl-N-hydroxyarenesulfonamides
Authors: Sekiya Akira , Umemoto Teruo 
Published: July 2006

Abstract
The reaction of trifluoronitrosomethane 1 with arenesulfonohydrazides resulted in the formation of N-trifluoromethyl-N-hydroxyarenesulfonamides 3 which were characterized by spectral and elemental analyses. It showed a sharp contrast to the reaction of 1 with acyl- or carbamoylhydrazines, which afforded the corresponding trifluoromethylazo compounds. As an alternative route, 3 could be synthesized by the reaction of 1 with arenesulfinic acids or their salts. The sulfonamides 3 were converted to the corresponding methyl ethers or tosylates.
A Molecular Orbital Study of the 1,2-Migration Reaction of Substituted Cyclohexadienyl Radicals
Authors: Kikuchi Osamu , Shimomura Satoshi 
Published: July 2006

Abstract
The 1,2-migration reaction of cyclohexadienyl radicals was examined on the basis of an open-shell restricted self-consistent field (SCF) MINDO/3 calculation. For the NO2- and OH-substituted cyclohexadienyl radicals, the 6-substituted isomers (1; X=H, Y=NO2 or OH) were calculated to be the least stable and apt to undergo a 1,2-hydrogen shift. The electron-withdrawing groups were predicted to have high migratory aptitude.
A Study of Inorganic Ion Exchangers. IX. The Synthesis of AlxZrH2−3x(PO4)2·yH2O and Its Characteristics
Authors: Kobayashi Etsuro 
Published: July 2006

Abstract
To make a material with specific functions such as those of a catalyst, a layer-structure compound with the formula of AlxZrH2−3x(PO4)2·yH2O (x≤2⁄3) was synthesized by a hydrothermal reaction between ZrOCl2·8H2O and Al(H2PO4)3 at 200–270°C. The product had a layer spacing of 7.75 Å, slightly longer than α-Zr(HPO4)2·H2O (7.62 Å), and fairly good thermal stability at 250–500°C. However, the above objective was not attained by ion-exchange between various zirconium phosphates and an aqueous solution of aluminium chloride.
Thermal Decomposition of Cobalt(II) Halide Complexes of Tetramethylurea and Related Cyclic Ureas
Authors: Sone Kozo , Kikuchi Masae , Ogasawara Kaede , Kuya Miuaco Kawashita , Pereira Anamaria Dias 
Published: July 2006

Abstract
TG-DTA studies revealed that the complexes CoX2L2 (L=tmu, dmeu or dmpu (see text); X=Cl, Br or I) decompose into CoX2 and 2L by slight heating. The ease of this decomposition decreases in the orders of tmu&gt;dmeu&gt;dmpu and Cl&gt;Br&gt;I, corresponding to the orders of coordination abilities of these ligands.