bluuebunny/crossref_metadata_2025_split huggingface dataset:
Die Kristallstruktur von β-NaSbS2 / The Crystal Structure of β-NaSbS2
Authors: Volk Klaus , Schäfer Herbert 
Published: February 2015

Abstract
β-NaSbS2 crystallizes monoclinically, C2/m, with a = 1284(2) pm, b = 582.5(8) pm, c = 581.3(3) pm, β - 118.74(7)°. In the structure there are ψ-SbS5-octahedra, which are connected by common edges to sheets separated by the Na ions.
Die Cyanat-induzierte Umwandlung von Calciumhydrogenphosphat in Calciumdiphosphat -eine präbiotische Schlüsselreaktion ? / The Conversion of Calcium Hydrogenphosphate into Calcium Diphosphate by Cyanate - a Prebiotic Key Reaction ?
Authors: Seel F. , Schinnerling F. 
Published: February 2015

Abstract
The conversion of calcium phosphate into calcium diphosphate through cyanate in an aqueous suspension, discovered by Miller and Parris [1], has been reinvestigated thor-oughly. The reaction is initiated through the disproportionation of calcium hydrogen phosphate to give hydroxylapatite and calcium dihydrogen phosphate, which reacts with cyanate via carbamoylphosphate to yield calcium diphosphate and urea. In particular, it could be shown that the process of phosphate condensation may also be initiated when cyanate is generated by a photochemical oxidation of hydrocyanic acid. -The importance of this reaction with respect to the prebiotic synthesis of biopolymers is discussed.
NMR-Spektroskopie an paramagnetischen Komplexen, XIX 13C-und 1H-NMR-Zugang zu gewinkelten Titanocenen/NMR Spectroscopy on Paramagnetic Complexes, XIX 13C and 1H NMR Access to Bent Titanocenes
Authors: Köhler Frank H. , Cozak Daniel 
Published: February 2015

Abstract
From [(RC5H4)2TiCl]2, R = H (1), CH3 (2) and C2H5 (3), (C5H5)2TiBH4 (4) and (C5H5)2Ti(CH3CN)Cl (5) the first paramagnetic 13C and 1H NMR spectra in the series of bent titanocenes have been obtained. Broad signals shifted to low field originate from the cyclopentadienyl protons while the corresponding 13C signals appear at high field relative to a diamagnetic reference. This is ascribed to π-polarisation which dominates the transfer of unpaired electrons onto the five-membered ring while σ-polarisation delocalizes them onto other ligands. The NMR shifts indicate that titanocene halides are antiferromagnetically coupled in solution, the extent depending on the solvent and on five-membered ring substituents. In the gas phase only monomers are found by mass spectroscopy. Paramagnetic NMR further reveals proton exchange in 4 and ligand dissociation in 5.
Über neue zweikernige Metallcarbonylkomplexe mit Cyclohexadienyl-cycloheptatrien-und Cyclohexadienyl-isonitril-Brücken/On New Dinuclear Metal Carbonyl Complexes with Cyclohexadienyl Cycloheptatriene and Cyclohexadienyl Isonitrile Bridges
Authors: Moll Matthias , Würstl Peter , Behrens Helmut , Merbach Peter 
Published: February 2015

Abstract
The reactions of the electrophilic [C6H7Fe(CO)3]+ -and [C6H7Fe(CO)2CNEt]+-cations with theextremely nucleophilic [C7H7Fe(CO)3]- -anion lead to the formation of the dinuclear cyclohexadienyl cycloheptatriene bridged complexes (OC)3FeC6H7-C7H7Fe(CO)3 and EtNC(OC)2FeC6H7-C7H7Fe(CO)3. In a similar reaction the tricarbonyl cation [CeH7Fe(CO)3]+ with [Cr(CO)5CN] _ yields the dinuclear cyclohexadienyl isonitrile bridged compound (OC)3FeC6H7-NCCr(CO)5. The mass, IR and NMR data of the new complexes are reported.
Chemie polyfunktioneller Liganden, 48 [1]. Synthese, Schwingungsspektren, Molekül-und Kristallstruktur eines Organocyclotriarsan-pentacarbonylchrom-Komplexes / Chemistry of Polyfunctional Ligands, 48 [1]. Synthesis, Vibrational Spectra, Molecular and Crystal Structure of an Organocyclotriarsane-pentacarbonylchromium Complex
Authors: Ellermann Jochen , Lindner Helmut A. , Schössner Horst , Thiele Gerhard , Zoubek Gerd 
Published: February 2015

Abstract
The organocyclotriarsane, CH3C(CH2As)3 (1), reacts with chromium hexacarbonyl on ultraviolet irradiation to give the complex CH3C(CH2As)3Cr(CO)5 (2), in which the cyclo-triarsane is behaving as a monodentate ligand. The crystal structure of 2 has been determinated by X-ray diffraction. The monoclinic unit cell (space group P21/n) contains 4 isolated molecules in a hexagonal closest packing. The mass spectrum of 2 shows the parent peak and clear fragmentation patterns. The infrared and Raman spectra are reported for 1 and 2 in the 3000-30 cm-1 region. Most of the fundamental vibrations are assigned.
Bis(tetrachloromolybdän)diazen, [MONCl4]2/Bis (tetrachloromolybdenum )diazene, [MoNCl4]2
Authors: Liebelt Wolfgang , Dehnicke Kurt 
Published: February 2015

Abstract
Bis(tetrachloromolybdenum)diazene, [MoNCl4]2 is prepared by the reaction of molybdenum pentachloride with iodine azide as well as by the reaction of molybdenum pentachloride with nitrogen trichloride. The IR spectrum, the mass spectrum and the magnetic moment (μeff = 1.63 B.M.) are in agreement with a N-N-bonded dimeric structure and Mo ≡ N-triple bonds.
Chalkogenolat-Ionen und ihre Derivate, V Kristall- und Molekülstruktur von 2.8-Dimethyldibenzo [c.g] [1.2.5.6] tetrathiacyclooktadien, einem Oxidationsprodukt von 4-Methylbenzol-1.2-dithiol/Chalcogenolates and their Derivatives, V Crystal and Molecular Structure of 2.8-Dimethyldibenzo[c,g][1,2,5,6]tetrathiaocin, an Oxidation Product of 4-Methylbenzene-1,2-dithiol
Authors: Kopf Jürgen , Deuten Klaus von , Nakhdjavan Bahman , Klar Günter 
Published: February 2015

Abstract
The structure of 2,8-dimethyldibenzo[c,g][1,2,5,6]tetrathiaocin (1b) has been determined by X-ray methods and discussed in connection with the preferred conformations of diaryl disulfides. The compound has the anti-form I. The SS-distance is 205.8 pm, the mean CSS-angle 104.1°, and the CSS/SSC-dihedral angle 111.1°.
Reaktion von Carboxamiden mit Chinolinium-Salzen bei Einwirkung von Base/Reaction of Carboxamides with Quinolinium Salts under the Influence of Base
Authors: Gündel Wolf-Hellmut , Berenbold Helmut 
Published: February 2015

Abstract
Carboxamides react under basic conditions with quaternary 3-cyanoquinolinium salts to give stable insertion products with 1,2-or 1,4-dihydroquinoline structure. Six examples are given.
Darstellung von Triphenylsilyl-diphenylphosphin/ Synthesis of Triphenylsilyl Diphenylphosphine
Authors: Antoniadis Antonios , Kunze Udo 
Published: February 2015

Abstract
The general synthetic routes to aromatic triorganylelement(IV b) diorganylphosphines are summarized and briefly discussed. By metathetical reaction of lithium or sodium diphenylphosphide and triphenylelement(IVb) chloride, triphenyltin diphenylphosphine (1) and the new compound triphenylsilyl diphenylphosphine (2) are obtained in good yields.
Chemischer Strukturbeweis für Photobilin c und ein Beitrag zu seinem Bildungsmechanismus/Chemical Structure Determination for Photobilin c and a Contribution to the Formation Mechanism
Authors: Risch Nikolaus , Belter Clemens 
Published: February 2015

Abstract
The structure of photobilin c is determined by oxidative degradation of 18O-labeled material which is prepared by photooxidation of a derivative of bacteriochlorophyll c in the presence of molecular 18O2.
Darstellung und Eigenschaften von Mono-, Isopoly-und Heteropolymolybdaten organischer Kationen / Preparation and Properties of Mono-, Isopoly-and Heteropolymolybdates with Organic Cations
Authors: Fuchs Joachim , Thiele Axel 
Published: February 2015

Abstract
In the presence of small quantities of water MoO3 is degradated by amines. In the process solvent free octa-, hepta-or monomolybdates are produced, or monomolybdates containing water of crystallization. The extent of the degradation is not dependent on the basicity of the amines but rather on the number of hydrogen-bridged bonds that the ammonium cation can form. The IR spectra indicate that the monomolybdates may be classified into 3 different structural types. In the reaction of monomolybdates with Te(OH)6, Ni(NO3)2 · 6 H2O or FeCl3 · 6 H2O in methanol hexamolybdato-tellurate, niccolate or ferrate were obtained. The solubility of iso and heteropolymolybdates in organic solvents was investigated.
Planare Komplexe von unsymmetrisch substituierten Alkyl- und Aryl-α.β-diondioximen mit den Ionen Nickel(II), Palladium(II) und Platin(II) / Planar Complexes of Unsymmetrically Substituted Alkyl and Aryl-1,2-dionedioximes with the Ions Nickel(II), Palladium(II) and Platinum(II)
Authors: Keller H. J. , Lehmann R. 
Published: February 2015

Abstract
A series of new planar bis(α,β-dionedioximato) metal(II) complexes of the ions Ni(II), Pd(II), Pt(II)using unsymmetrically substituted glyoximes as ligands are reported. Typical ligands being unsymmetrically substituted benzildioximes, phenylglyoxime or butan-1,2-dionedioxime.The solid state properties and in some cases the X-ray data suggest, that most of the isolated complexes crystallize in columnar stacks. Compared with the known symmetrical derivatives the solubility of the isolated neutral compounds in organic solvents like ethanol, chloroform or 1,2-dichlorobenzene is highly increased. Most of the compounds can therefore be obtained in good crystalline form. The good solubility is an advantage in the efforts to extend the polarizable ligand system of the complexes.
β,β-Diacyl-enamines and -enoles, III Formylation of CH2-acidic Compounds via the Anilinomethylene Derivatives
Authors: Wolfbeis Otto S. , Junek Hans 
Published: February 2015

Abstract
Three component condensation of active methylene compounds with aniline and trialkyl orthoformate gives anilinomethylene-1,3-dicarbonyls, which can be hydrolysed with aqueous K2CO3, KOH or HCl, depending on the sensitivity of the hydroxymethylene derivative thus formed. The reactions sequence is fairly generally applicable: Cyclohexan-1,3-diones, pyrimin-3,5-diones (including barbituric acids), pyrazolones and pyrazolin-3,5-diones, indan-1,3-dione, (thio)phthalide, indoxyl, oxindole, anthrone, 2,6- and 2,7-dihydroxynaphthalene, and pentan-2,4-dione have been formylated. Using orthoacetate or orthopropionate, tetronic acid, pyrazolones and pyrazolin-3,5-diones,resp.,could also be acylated by this method.
Mass Spectroscopic Fragmentation Reactions, XXI Factors Influencing the Loss of Xylene and Toluene from the Polyene Chain of Carotenoids
Authors: Johannes B. , Brzezinka H. , Budzikiewicz H. 
Published: February 2015

Abstract
By examining suitably substituted analogs of carotenoids the steric and electronic influences governing the elimination of xylene and toluene from the polyene chain have been clarified.
Organische Schwefelverbindungen, XXXIII CO2-Eliminierung aus Radikalkationen von Thiolestern in der Gasphase: Intramolekulare Sauerstoff-Wanderung vom (C+3/C+3)-Typ / Organic Sulfur Compounds, XXXIII CO2 Elimination from Gaseous Radical Cations of Thiol Esters: Intramolecular Oxygen Transfer of (C+3/C+3)-Type
Authors: Kohne Bernd , Praefcke Klaus , Schwarz Helmut 
Published: February 2015

Abstract
It is shown for the first time that under electron impact conditions an intramolecular oxygen transfer is possible from the thiol ester funtion onto the carbon atom of a second thiol ester group. The reaction sequence is terminated by CO2 elimination and the proposed structure of the resulting product ion is based on 13 carbon labelling experiments and collisional activation mass spectrometry. In addition, some unusual examples of ring contraction processes in the gas phase are reported.
The Alkyl Inductive Effect, II Theoretical Calculation of Inductive Parameters
Authors: Widingand Harry F. , Levitt Leonard S. 
Published: February 2015

Abstract
Three models of alkyl groups, “derealization”, “through-the-bond”, and “electric field” models, are presented, all of which enable the calculation of σI (R) from first principles, and excellent agreement is demonstrated for the calculated and experimental values of σI (R) . For the “delocalization” model it is found that - σI (R) = 0.0455 + 0.0232(1-1/n), where n is the number of C atoms in an n-alkyl group, and for an infinite C-chain R group, σI( R∞) is - 0.0687, identical to the value found b y a different method in Part I of this series. The “through-the-bond” model gives - σI(R) = - 0.0559 +

, where Ci is the number of C-atoms in the i th position from X in RX; and for the “electric field” model, we obtain - σI(R) = 0.0463 + 0.0102

, where di is the calculated distance from C1 to Cn in the most probable conformation of the R-group. It is concluded that Taft's σI(R) values have a real significance whether or not the physical and chemical effects of alkyl substitution reside ultimately in an internal induction mechanism, or in alkyl group polarization by charged centers in the molecule, or a combination of the two.
Notizen: Darstellung und Kristallstruktur des Na2AgSb / Preparation and Crystal Structure of Na2AgSb
Authors: Schuster Hans-Uwe , Mues Cornelia , Jung Walter 
Published: February 2015

Abstract
Na2AgSb crystallizes orthorhombically, space group Cmcm, with a = 929.2 pm, b = 790.3 pm, c = 577.3 pm. The structure contains Ag-Sb-zigzag-chains with ∢ Ag-Sb-Ag = 180° and ∢ Sb-Ag-Sb = 64.9°.
Notizen: Umwandlung gewellter Si-Schichten in einen Si-Raumnetzverband / Transformation of Corrugated Si-Layers into a Three-Dimensional Si-Network
Authors: Evers Jürgen , Oehlinger Gilbert , Weiss Armin 
Published: February 2015

Abstract
Corrugated Si-layers in trigonal Ca0,65Sr0,35Si2 (EuGe2 type of structure, D3d
3 -P 3̄m l, a = 389.1 pm, c = 504.8 pm, Z = 1, zSi = 0,420) are transformed by a high pressure-high temperature treatment into a tetragonal three-dimensional Si-network (a = ThSi2 type of structure, D4h
19-I 41/amd, a = 433.6 pm, c = 1367 pm, Z = 4, zSi = 0.414).
Reaktionsprodukte yon Oxylsäuremethylester-N-methylamiden mit Antimon(V)-chlorid. Molekülspektren und Struktur / Reaction Products of Oxalic Acid Methylester-N-methylamides and Antimony(V) Chloride. Molecular Spectra and Structure
Authors: Rössler M. , Schwarz W. , Schmidt A. 
Published: February 2015

Abstract
Oxalic acid dimethylester and the oxalic acid methylester-N-methylamides 2 and 4, resp., react with antimony(V) chloride to yield the 1 : 1 addition compound 5 or the cyclic tetrachloroantimony(V) compounds 1, 3 and 6, resp., which represent SbO2C2 and SbONC2 five ring systems, resp. Li oxalic acid methylester-N-methylimide (9) and anti-mony(V) chloride gives the bicyclic octachloro-N-methylamido oxalato-O,O′-O,N-diantimony(V) (10). The crystal and molecular structure of tetrachloro-N-methylamino oxalato-O,O′-antimony(V) (3) is determined by X-ray analysis. The vibrational and 1H NMR spectra of 2-10 are reported and discussed.
Abhängigkeit der Chlor-Isotopenseparation vom Vernetzungsgrad eines stark basischen Anionenaustauschers / Dependence of Chlorine Isotope Separation on the Degree of Cross Linkage of a Strongly Basic Anion Exchange Resin
Authors: Heumann Klaus G. , Roßmann Paul , Schwarz Anni , Windfelder Alfred 
Published: February 2015

Abstract
Using ion exchange chromatography, the dependence of the chlorine isotope separation on the degree of cross linkage of a strongly basic anion exchange resin was investigated. With increasing degree of cross linkage the elementary separation effect for the two stable isotopes 35Cl and 37Cl increases. In all experiments 35Cl- is enriched in the resin phase, whereas 37Cl- is enriched in the solution, using 0.1 M NaNO3 as an eluant. Within the degree of cross linkage of 2 to 10 per cent investigated, there is a linear correlation of the elementary separation effect of the chlorine isotopes with the selectivity coefficient between the ions NO3- and Cl-. The results show that the electrolyte behavior of anionic isotope exchange reactions is comparable with that of cations. The 35Cl/37Cl isotope ratio is determined using thermal ionization mass spectrometry.
Diazadistibetidine / Diazadistibetidines
Authors: Kuhn Norbert , Scherer Otto J. 
Published: February 2015

Abstract
Diazadistibetidines of the type (XSbNCR3)2, with X = Cl, Br and R = CH3, have been synthesized by reacting SbX3 with LiN(CR3)SiR3-The initial reaction products R3C(R3Si)NSbX2 (1) split off R3SiX with formation of the four-membered rings 2. The silylated bis(amino)-halostibines 3 do not eliminate R3SiX even at 200 °C.
Synthese und Eigenschaften von μ2 Silandiyl-Eisencarbonylen [1] / Synthesis and Properties of μ2-Silanediyl Iron Carbonyls [1]
Authors: Schmid Günter , Welz Eckhard 
Published: February 2015

Abstract
The synthesis of dinuclear complexes of the types [(CO)4FeSiR 1 R 2 ]2 and Fe2(CO)7(SiR 1 R 2)2 is described. IR, mass and Mössbauer spectroscopic data are discussed.
XPS Spectra of Copper and Nickel Biuret Complexes — Observations of Intense Satellite Structure in the 2P Spectrum of a Copper(III) System
Authors: Brown Dennis G. , Weser Ulrich 
Published: February 2015

Abstract
A series of copper and nickel biuret complexes has been studied by X-ray photoelectron spectroscopy (XPS). The results include one of the first reports of the XPS spectrum of a copper(III) complex. Significantly, this diamagnetic complex exhibits intense satellite structure in both the Cu 2P3/2 and Cu 2Pi/2 regions. The isoelectronic nickel(II) complex shows no comparable satellite structure.
Eine pentagonal pyramidale Koordination des Bismuts. Kristallstruktur von Methylbismutbis( diethyldithiocarbamat) / A Pentagonal Pyramidal Coordination of Bismut. Crystal Structure of Methylbismuthbis( diethyldithiocarbamate)
Authors: Burschka Christian , Wieber Markus 
Published: February 2015

Abstract
Methylbismuth-bis(diethyldithiocarbamate), X-ray The crystal structure of the title compound, recrystallized from ethanol, was solved by means of X-ray diffraction methods and could be refined to an i?-value of 0.050 with 2126 reflections observed. In contrast to its behaviour in benzene solution, where the compound is monomeric, in the crystalline state dimeric units are formed by intermolecular Bi-S-interactions. The bismuth atoms are coordinated in form of a slightly distorted pentagonal pyramid with the free electron pair presumably directed opposite the apical C-atom.
Cyclische Diazastannylene, VIII [1]. Die Kristall- und Molekülstruktur eines Iminostannylens: Sn3(NC(CH3 )3)4H2 / Cyclic Diazastannylenes, VIII [1]. The Crystal and Molecular Structure of an Iminostannylene: Sn3(NC(CH3 )3)4H2
Authors: Veith M. 
Published: February 2015

Abstract
The crystal and molecular structure of the compound Sn3(NC(CH3)3)4H2 has been determined from X-ray data (R=0.044). The crystals are cubic, space group Pa3, with cell dimension a - 1713.6(8) pm and Z = 8. The molecules, which have a seco-norcubane like Sn3N4 framework, are statistically disordered, thus forming closed packed pairs of molecules. The Sn3N4 cage deviates strongly from a cube, the bond angles at Sn approaching 80°, and at N 100°. The averaged Sn-N bond distance is 223(1) pm.
The Topochemical Reaction of CaSi2 to a Two-Dimensional Subsiliceous Acid Si6H3(OH)3 ( = Kautskys’ Siloxene)
Authors: Weiss Armin , Beil Gerd , Meyer Heinrich 
Published: February 2015

Abstract
Kautsky’s siloxene was prepared in a topochemical reaction from large crystals of CaSi2. The structure model was revised. Siloxene is a subsiliceous acid [Si6]H3(OH)3 and consists of two-dimensional corrugated Si-layers with three Si-Si bonds per silicon and an OH-or H-ligand, respectively. Ordering of adjacent layers is turbostratic. The layer lattice is capable of forming intercalation complexes. On intercalation only the layer distance is changed.
The alkoxylated derivatives Si6H3(OCH3)3n and Si6H3(OC2H5)3n are also able to intercalate polar molecules.
Kupfer(II)-Komplexe mit dia- und paramagnetischen Carboxylatliganden / Copper(II) Complexes with Dia- and Paramagnetic Carboxylate Ligands
Authors: Fedrigolli Richard , Schwarzhans Karl E. 
Published: February 2015

Abstract
The stable free radicals 4-carboxy-2,2,6,6-tetramethylpiperidinooxyl, 4-carboxy-methylene-2,2,6,6-tetramethylpiperidinooxyl, 4-carboxymethyl-2,2,6,6-tetramethylpipe-ridinooxyl and 3′-carboxy-2,2,6,6-tetramethylpiperidine-4-spiro-2′-oxirane-l-yloxyl have been prepared and used as ligands in copper(II) complexes. The magnetic moments and the EPR spectra of the complexes and the free radicals have been investigated and compared with complexes containing diamagnetic cyclohexanecarboxylic acid or cyclo -hexaneacetic acid ligands. One of the copper(II) complexes shows a considerable inter-action between the nitroxyl radicals of the ligands.
Tetrachloroaluminate, -ferrate und -gallate: AIMIIICl4 (AI = Li-Cs, NH4, Tl, In; MiIII = Al, Fe, Ga) / Tetrachloroaluminates, -ferrates and -gallates: AIMIIICl4 (AI = Li-Cs, NH4, Tl, In; MIII = Al, Fe, Ga)
Authors: Meyer Gerd , Schwan Ellen 
Published: February 2015

Abstract
Tetrachloroaluminates, -ferrates and -gallates of formulae AIMIIICL4 with A1 = Cs, Rb, In, Tl, NH4 as well as the high temperature forms of the potassium compounds (KMIIICl4-III) crystallize with the baryte type structure. LiMIIICL4, NaMIIICl4, and KMIIICl4-II (MIII = AI, Fe, Ga), isotypic among themselves, belong -dependent on the size of the A+ ion -to three different structure types.
Ternäre Phosphide mit ThCr2Si2 -Struktur / Ternary Phosphides with the ThCr2Si2 Structure
Authors: Mewis Albrecht 
Published: February 2015

Ten new compounds with the general formula AB2P2 (A = Ca, Sr, Eu, Ba; B = Cu, Ni, Co, Fe, Mn) have been prepared and their structures determined. They are isotypic and crystallize in the ThCr2Si2 structure (space group I4/mmm) with the following constants:
CaCu1.75P2 a = 401.4 1 pm, c = 962.7(1) pm
CaNi2P2 a = 391.6 1 pm, c = 936.3(1) pm
CaCo2P2 a = 385.8 1 pm, c = 959.3(1) pm
CaFe2P2 a = 385.5 1 pm, c = 998.5(1) pm
SrCu1.75P2 a = 416.6 1 pm, c = 960.7(1) pm
EUCU1.75P2 a = 411.0 1 pm, c = 959.1(1) pm
SrCo2P2 a = 379.4 1 pm, c = 1161.0(1) pm
SrFe2P2 a = 382.5 1 pm, c = 1161.2(1) pm
BaFe2P2 a = 384.0 1 pm, c = 1244.2(1) pm
BaMn2P2 a = 403.7 1 pm, c = 1306.1(1) pm
While in Ca(Sr,Eu)Cu1.75P2 the P atoms form pairs, they are isolated from each other in the other compounds.
Die Kristallstmktiir des Iodnitren-Komplexes Cl3V ≡ N-I / Crystal Structure of the Iodonitrene Complex, Cl3V≡N-I
Authors: Liebelt Wolfgang , Weller Frank 
Published: February 2015

Abstract
Cl3VNI crystallizes isotypically with Cl3VNCI in the triclinic space group P1̄. The crystals contain dimeric units which are formed via chlorine bridges. The VNI group is linear with an sp-hybridized nitrogen and a V-N triple bond, (angle VNI = 163°, V-N = 165 pm, N-I = 193 pm). A short contact distance of 307 pm between the I atom and a neighbouring Cl atom is observed.
Darstellung und Eigenschaften von Molybdäntetraethoxid / Preparation and Properties of Molybdenum Tetraethoxide
Authors: Hillebrand Uwe , Stumpp Eberhard 
Published: February 2015

Abstract
The title compound has been isolated from reaction of MOCl5 and KOEt in ethanol. The presence of bridging alkoxy groups was proved by means of 1H NMR spectra. Magnetic susceptibility and electronic spectra were measured, and the results are discussed in terms of octahedrally coordinated Mo(IV).
Metallkomplexe mit Tetrapyrrol-Liganden, XXIV [1]. Zur Kenntnis der Platin(IV)-Porphyrine / Metal Complexes with Tetrapyrrole Ligands, XXIV [1]. On the Knowledge of Platinum(IV) Porphyrins
Authors: Buchler Johann W. , Lay Kiong-Lam , Stoppa Harald 
Published: February 2015

Abstract
The first platinum(IV) porphyrin, dichloromeso-tetra(p-tolyl)porphinatoplatinum(IV) [Pt(TPP)Cl2**], is prepared by oxidation of the corresponding platinum(II) complex [Pt(TTP)**] with hydrogen peroxide in acidic media and treatment with hydrogen chloride. Pt(TTP)Cl2 is thermally stable up to 200 °C. Electrochemical reduction yields Pt(TTP), presumably by a two-electron step. The platinum-to-porphyrin π-backbonding known to exist in Pt(TTP) decreases on oxidation to Pt(TTP)Cl2 but does not vanish. An improved synthesis of Pt(TTP) is described. Evidence for the accessibility of Pt(OEP)Cl2 and Pd(TTP)Cl2 is also presented.