bluuebunny/crossref_metadata_2025_split huggingface dataset:
[Aryl(phenyl)selenoketon]pentacarbonyl-Komplexe von Chrom und Wolfram / [Aryl(phenyl)selenoketone]pentacarbonyl Complexes of Chromium and Tungsten
Authors: Fischer Helmut , Zeuner Siegfried 
Published: February 2015

Abstract
[Aryl(phenyl)carbene]pentacarbonyl complexes of chromium and tungsten, (CO)5M[C(p-C6H4R)Ph] (M = Cr, R = H and M = W, R = NMe2, OMe, Me, H, Br, CF3) react with phenylisoselenocyanate or potassium selenocyanate inserting selenium into the metal-carbene bond to give the first η1 -bonded bisarylselenoketone(carbonyl) complexes, (CO)5M[Se = C(p-C6H4R)Ph]. The compounds were characterized by analytical and spectroscopic means.
Elektrochemische Synthesen, XIX [1]. Eine elektrochemische Synthese von Polythiazyl / Electrochemical Syntheses, XIX [1]. An Electrochemical Synthesis of Polythiazyl
Authors: Fritz Heinz P. , Bruchhaus Rainer 
Published: February 2015

Abstract
A facile synthesis of (chlorinated) polythiazyl by cathodic reduction of (S5N5)(FeCL4] in (Bu4N)[BF4]/CH2Cl2 at low temperatures is reported. The product was characterized by IR and mass spectra, Debeye-Scherrer diagrams and elemental analyses. Potential applications were tested.
Die experimentelle Bestimmung der Elektronendichteverteilung in einem Chrom-Carben- sowie einem Chrom-Carbin-Komplex / The Experimental Determination of the Electronic Deformation Densities in a Chromium Carbene and a Chromium Carbyne Complex
Authors: Krüger C. , Goddard R. , Claus K. H. 
Published: February 2015

Abstract
The electronic deformation densities for pentacarbonylmethylethoxycarbenechromium I and chlorotetracarbonylethylidynechromium II have been experimentally determined using Neutron (for I) and X-ray diffracted intensities measured from single crystals at 100 K. A build up of electron density in all bonds and around each chromium atom is observed. Deformation density maxima are directed along the 3-fold axes of the approx-imately octahedrally coordinated metal atoms and presumably represent occupation of the t2g d-orbital set. The observed electron density distributions indicate that intermole-cular bonding has an important influence on the distribution of electron density in the molecules.
Platin in seiner ungewöhnlichen Oxidationsstufe + III: Diplatin(III)-Komplexe der Modellnukleobase 1-Methyluracil / Platinum in its Unusual Oxidation State + III: Diplatinum(III) Complexes with the Model Nucleobase 1-Methyluracil
Authors: Lippert Bernhard , Schöllhorn Helmut , Thewalt Ulf 
Published: February 2015

Oxidation of the head-tail dimer cis-[(NH3)2Pt(1-MeU)]2(NO3)2 (1-MeU = 1-methyl - uracilato anion, C5H5N2O2) with a mixture of nitrous and nitric acid yields three crystalline species,
[(NO2)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO2)](NO3)2 · 3 H2O (1),
[(H2O)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO2)](NO3)2 · 5 H2O (2) and
[(NO3)(NH3)2Pt(C5H5N2O2)2Pt(]SrH3)2(NO3)](NO3)2 · 4.5 H2O (3).
The crystal structure of 2 has been determined. 2 crystallizes in the triclinic space group P1̄ with cell dimensions a= 11.959(4), b= 11.560(3), c= 11.261(2) Å, α = 89.16(2), β= 104.36(2), γ = 99.61(2)° and Z = 2. The structure was refined to R = 0.056, Rw = 0.061 on 4311 reflections. The Pt-Pt distance within the dinuclear cation of 2 is 2.574(1) Å and cor­responds to a Pt-Pt single bond. The axial ligands are N̲O2 (Ptl) and O̲H2 (Pt2), the equatorial ligands two NH3 groups, N 3 and O4 of 1-MeU for both Pt atoms. The oxidation state of Pt in 2 is +III. 1H NMR and IR spectra of 1, 2, and 3 reveal a close structural similarity of the three compounds.
Komplexbildung von Rhodium mit 6.6-Dimethylfulven / Complex Formation of Rhodium with 6.6-Dimethylfulvene
Authors: Müller Jörn , Stock Rainer , Pickardt Joachim 
Published: February 2015

Abstract
Reaction of [(nbd)RhCl]2 (nbd = nor bornadiene) with CH3Li and 6.6-dimethylfulvene yields (nbd)Rh(2-propenylcyclopentadienyl). (cod)Rh(Cl)P(CH3)3 (cod = 1.5-cyclooctadiene), obtained by cleavage of [(cod)RhCl]2 with P(CH3)3, reacts with 6.6-dimethyl-fulvene and CH3Li or i-C3H7MgBr with substitution of cod by dimeric fulvene ligands the nature of which depends on the alkyl reagent. The new complexes were characterized by NMR spectra and in one case by X-ray diffraction analysis.
Synthese, Struktur und Sb-Mößbauer-Spektren kovalenter und ionischer Tetraorganoantimon(V) -Verbindungen / Synthesis, Structure and Sb-Mößbauer Spectra of Covalent and Ionic Tetraorganoantimony(V) Compounds
Authors: Schmidbaur Hubert , Milewski-Mahrla Beatrix , Wagner Fritz E. 
Published: February 2015

Abstract
Tetramethylstibonium and tetraphenylstibonium oxinate(1, 2) and anthranilate (4, 5) have been prepared from the antimony pentaorganyls and 8-oxy-quinoline or anthranilic acid, respectively. The crystal structure determination of 1 revealed covalent molecules with planar bidentate oxinate as part of a distorted coordination octahedron at antimony. -121Sb-Mößbauer spectra of 1, 2, 4, 5 and of tetramethylstibonium acetylacetonate (3) are also in agreement with covalent structures, but a pentacoordinate environment of Sb is more likely for the anthranilates 4, 5. The spectra of the hydrogendicarboxylates 6-9, however, point to ionic stuctures with, if any, only weak donor interactions of the anions with the stibonium cations.
Ferrocenylen-cobaltocenylenium-hexafluorophosphat [(h5:h5'-C10H8)2FeCo] [PF6], ein gemischtkerniger Komplex vom Bis(fulvalen)dimetall-Typus / Ferrocenylenecobaltocenyleniumhexafluorophosphate [(h5:h5'-C10H8)2FeCo] [PF6], a Mixed Membered Complex of Bisfulvalenedimetal Type
Authors: Schwarzhans Karl E. , Schottenberger Herwig 
Published: February 2015

Abstract
Ferrocenylenecobaltocenylenium-monochloride and ferrocenylenecobaltocenylenium-hexafluorophosphate were prepared under the aspect of influencing the valence averaging phenomena described for homodinuclear metallofulvalenes. Detected paramagnetism of the monocation is assumed to result from such interactions in dibridged rigid metallocenes. The above cation is characterized by IR, CV, MS, electron microprobe and elemental analyses.
Osmiumisonitril-Komplexe mit Os-H-, Os-CH3- und Os-Au-Bindungen [1] / Osmiumisonitrile Complexes Containing Os-H. Os-CH3 and Os-Au Bonds [1]
Authors: Werner H. , Weinand R. 
Published: February 2015

Abstract
The complexes C6H6Os(PMe3)CNR (R = Me, t-Bu, p-Tol, Ph) are prepared from [C6H6OsI(PMe3)CNR]PF6 and NaC10H8. They behave as metal bases and react with NH4PF6, CH3I and ClAuPPh3 to form salts of the corresponding cations [C6H6OsX(PMe3)CNR]+ where X is H, CH3 and AuPPh3, respectively. The reactions of [C6H6OsX(PMe3)CNR]PF6 (X = I, H, CH3) with excess PMe3 lead to displacement of the benzene ring and formation of the complexes trans-[OsX(CNR)(PMe3)4]PF6.
Synthese und Kristallstruktur eines polymeren Addukts von 2.2′ -Dipyridil mit Iod: C10H8N2I6 / Synthesis and Crystal Structure of a Polymeric Adduct of 2,2′-Dipyridil and Iodine: C10H8N2I6
Authors: Pohl Siegfried 
Published: February 2015

The reaction of 2,2′-dipyridil with iodine (I2; molar ratio 1:3) in CH2Cl2 solution yields the polymeric complex 2,2′-dipyridil(I2)3. The crystal structure of the compound was determined from single crystal X-ray data (monoclinic, C2/c, a = 3215.0(16), b = 439.9(1), c = 1824.1(9) pm, β = 130.79(3)°, Z = 4).
2,2′-Dipyridil(I2)3 forms infinite chains of alternating I6 units and bifunctional dipyridil molecules
Al2Sb2I12: Vierkern-Einheiten in einem 1:1-Addukt aus AlI3 und SbI3 / Al2Sb2I12: Tetrameric Units in a 1:1 Adduct of AlI3 and SbI3
Authors: Pohl Siegfried 
Published: February 2015

Al2Sb2I12 (1) was prepared by heating stoichiometric amounts of AlI3 and SbI3 in CS2. The crystal structure of 1 was determined from single crystal X-ray data. The compound crystallizes in the monoclinic space group C2/m with a = 1644.0(3), b = 1318.3(2), c = 728.9(1) pm, β = 119.33(1)°, and Z = 2. The structure was refined by least squares methods to a final unweighted R value of 0.064 for 676 nonequivalent reflections.
The structure is built up of Al2Sb2I12 units in which two Sb-I octahedra share four common edges with two Al-I tetrahedra. As a consequence of the stereochemical activity of the non-bonding electron pair of antimony these cations are displaced from the centers of the iodine octahedra so that three different Sb-I bonds with distances of 270.8, 312.3, and 358.9 pm are observed in 1. The structure of Al2Sb2I12 can also be derived from the layer structures of the BiI3 type
γ-Radiolysis of 1,3-Dimethyluracil in N2O-Saturated Aqueous Solutions
Authors: Al-Sheikhly Mohamed , Sonntag Clemens von 
Published: February 2015

The γ-radiolysis of N2O-saturated aqueous solutions generates OH radicals and a small amount of H atoms. In 1,3-dimethyluracil solutions (10-3 M) these radicals add mainly to the 5-position of the C(5) -C(6) double bond of the solute. The resulting products have been identified by GC-MS after trimethylsilylation. The major products (G values in brackets) are dimers of the C(5) OH-adduct radicals (3.4), 5,6-dihydro-5,6-dihydroxy-1,3-dimethyl- uracil (0.85), 5,6-dihydro-5-hydroxy-1,3-dimethyluracil (0.75), dimer of the C(5)-OH- adduct with the C(5)-H-adduct radical (0.2) and 5,6-dihydro-6-hydroxy-1,3-dimethyl- uracil (0.2). G( 1,3-dimethyluracil consumption) has been found to be 5.7.
The major reaction in this system is the dimerisation of the primary radicals. To a small extent the primary radicals also disproportionate by electron transfer to give the glycol 5,6-dihydro-5,6-dihydroxy-1,3-dimethyluracil as one of the products. Radiolytically formed H2O2 which could oxidise the C(5)-OH-adduct radical does not contribute to the formation of the glycol because the H2O2 yield is not reduced with respect to its expected “molecular yield” (G = 0.75). In contrast to the uracil system where it has been reported that drastic changes in radiolytic yields occur on going from neutral to alkaline irradiation conditions no such changes have been observed with 1,3-dimethyluracil. However, an acid-catalysed rearrangement from the C(5)-OH-adduct to the C(6)-OH-adduct radical is observed in the present system
Reaktionen von Metallkomplexen mit kleinen Ringen, XI [1] Ringöffnung von Aziridinen mit Metallcarbonylhydriden; β-Aminoacylchelat-Komplexe von Mangan, Molybdän, Wolfram und Cobalt / Reactions of Metal Complexes with Small Rings, XI [1] Ring Opening of Aziridines by Metal Carbonyl Hydrides; β-Aminoacyl Chelate Complexes of Manganese, Molybdenum, Tungsten and Cobalt
Authors: Danzer Wolfgang , Höfer Roland , Menzel Hartmut , Olgemöller Bernhard , Beck Wolfgang 
Published: February 2015

The metal carbonyl hydrides HM(CO)3(π-C5H5) (M = Mo, W), HMn(CO)4L, HCo(CO)3L (L - CO, PPh3) react with aziridines by protonation of aziridine, nucleophilic attack of the corresponding carbonyl metallate and CO insertion to give the β-aminoacyl complexes 2-7. The ring opening of C-substituted aziridines is regiospecific. With alkyl substituted aziridines the nucleophilic attack of the carbonyl metallate occurs at the sterically less hindered carbon atom, with phenyl substituted aziridines at the phenyl substituted carbon atoms. From the reactions of HM(CO)3(π-C5H5) with optically active aziridines, which afford complexes with an asymmetric metal atom, only one diastereomer could be observed. The mechanism of these reactions is discussed and the spectral data (IR, 1H NMR, MS) of the complexes are reported. β-Aminoacyl complexes have also been obtained by addition of amines to [(π-C5H5)(CO)3M(alkene)]+BF4
- (M = Mo, W).
The methyl complex H3CMn(CO)5 reacts with aziridine to give the acetyl complexes H3CC(O)Mn(CO)4(aziridine) and H3CC(O)Mn(CO)3(aziridine)2, respectively
Darstellung und Struktur von S3N3O2Cl / Preparation and Structure of S3N3O2Cl
Authors: Roesky Herbert W. , Emmert Ralf , Noltemeyer Mathias , Sheldrick George M. 
Published: February 2015

Abstract
S3N3O2Cl (2) can be isolated as a decomposition product of S3N3O2Cl2 (1) in methylene chloride. Crystals of 2 are monoclinic, space group C2/c, with a - 1729.0(9), b = 670.7(4), c = 1201.4(7) pm, ft = 114.05(3)°. The structure was refined to R = 0.035 for 722 diffractometer data. 2 is the first compound containing a S3N3-ring with three differently coordinated sulfur atoms.
Synthese und Kristallstrukturanalyse von Undecacarbonyl- (μ-trifluormethylisocyanid)trieisen, Fe3(μ-CNCF3)(CO)11 / Synthesis and Crystal Structure Determination of Undecacarbonyl(μ-trifluoromethylisocyanide)triiron, Fe3(μ-CNCF3)(CO)11
Authors: Brüdgam Irene , Hartl Hans , Lentz Dieter 
Published: February 2015

Abstract
The unstable trifluorom ethylisocyanide can be stabilized on the Fe3(CO)11 framework. Infrared data suggest that the isocyanide ligand occupies bridging positions in the solid state and in solution. This fact has been confirmed by the crystal structure analysis and by 13C NMR measurements.
Ca3AlSb3 und Ca5Al2Bi6, zwei neue Zintlphasen mit kettenförmigen Anionen / New Zintl Phases with Chain Anions: On Ca3AlSb3 and Ca5Al2Bi6
Authors: Cordier Gerhard , Schäfer Herbert , Stelter Michael 
Published: February 2015

Abstract
The new compound Ca3AlSb3 crystallizes in the orthorhombic system (space group Pnma (No. 62)) with lattice constants
a = 1283.5(5) pm, b = 448.9(2) pm , c = 1428.2(5) pm
In the structure there are AlSb4 tetrahedra connected by common corners to form chains. The new compound Ca5Al2Bi6 crystallizes in the orthorhombic system, too (space group Pbam (No. 55)) with lattice constants
a = 2333.3(8) pm, b = 758.2(3) pm, c = 452.9(2) pm
AlBi4 tetrahedra are connected by common corners and Bi2 groups to form double chains. Both compounds are classified as Zintl phases.
Röntgenstrukturuntersuchungen an Verbindungen mit P—NH—P-Gerüst / X-Ray Structural Studies on Compounds with a P —NH-P Backbone
Authors: Nöth Heinrich , Fluck Ekkehard 
Published: February 2015

Abstract
The structures of four compounds containing the P-NH-P unit have been determined by X-ray methods in order to detect prototropism. Ph2P-NH-PPh2 in the solid state is indeed a bis(diphenylphosphino)amin having C2 molecular symmetry. Its bisborane(3) ad­duct possesses the structure Ph2P(BH3)-NH-P(BH3)Ph2 with the BH3 -groups in transoid position. The P-NH-P unit is also observed in (PhO)2P(O)-NH-P(O)(OPh)2 and (PhO)2P(O)-NH-P(O)(C2H5)2. These two compounds show weak intermolecular hydrogen bonding in the solid state to the oxygen atom of a phosphoryl group. The PN bond distances depend on the group X bonded to phosphorus and decrease in the series with X = BH3 > S > O, e.g. with the electron withdrawing ability of X.
Struktur und Schwingungsspektrum der Heteropolyverbindung K13[KP2W20O72] · xH2O / Structure and Vibrational Spectrum of the Heteropoly Compound K13[KP2W20O72] · xH2O
Authors: Fuchs Joachim , Palm Rosemarie 
Published: February 2015

Abstract
The title compound crystallizes monoclinicly in the space group P21/c with lattice parameters a = 13.522 Å, b = 22.379 Å, c = 15.071 Å und β = 95.95°. In the polyanion two α-PW9O34 moieties are bridged by two octahedral WO6 units. A potassium ion in the central cavity is surrounded by eight oxygen atoms of the polyanion in hexagonal bipyramidal coordination. - The vibration spectrum of the solid and its aqueous solution are discussed.
Zwei neue Tetraphosphor-trichalkogeno-diiodide α′-P4Se3I2 und α′-P4S3I2 / Two New Tetraphosphorus-trichalcogeno-diiodies α′-P4Se3I2 and α′-P4S3I2
Authors: Blachnik R. , Kurz G. , Wickel U. 
Published: February 2015

Abstract
α′-P4Se3I2 and α′-P4S3I2 were prepared by the reaction of P4S3 (P4Se3) with I2 in the molten state. The structure of α′-P4Se3I2 was determined. The compound crystallizes in the tetragonal space group I4̄2d with a - 1200.5(2) pm, c = 1518.8(4) pm, and eight molecules per unit cell. The structure was refined with 814 of 1402 observed reflections to a conventional residual of R = 0.045. One half of a molecule is forming the asymmetric unit. α′-P4S3l2 is isotypic with the lattice parameters a = 1182.2(2) pm and c = 1496.8(4) pm. 31P NMR data confirm that both modifica­tions have the same bicyclic molecular structure in solution as in the solid state and form an AA′BB′ system. Evidence is presented that the α-isomer is stabilized by the formation of two additional weak P-X bonds in this molecule.
Reactions of (SCN)2 with SnX4(X = Br, I)
Authors: Tudela D. , Fernandez V. , Tornero J. D. 
Published: February 2015

Abstract
From the reaction between (SCN)2 and Snl4 a compound is formed the formula of which is ISn(NCS)3 · I2, in which I2 molecules form charge-transfer complexes with thiocyanate groups. ISn(NCS)3 can be isolated from this compound. Both compounds were characterised by means of elemental analyses and UV-visible, IR and 119Sn Mossbauer spectra, and a polymer structure with thiocyanate bridges was deduced. The equilibrium constant was calculated for the reaction: ISn(NCS)3 · I2(solid)+CS2 ⇌ ISn(NCS)3(solid) + I2(solution) K = 2.2±0.3 x 10-3 mol l-1 and it was found that the two solid compounds form a single phase. SnBr4 forms an unstable addition compound with (SCN)2, which decomposes even below 0 °C.
ESCA-Untersuchungen über die Ladungsverteilung und den Bindungszustand der λ3- und λ5-Phosphorine / ESCA-Studies of the Charge Distribution and Boding of λ3- and λ5-Phosphorines
Authors: Knecht Josef 
Published: February 2015

Abstract
The ESCA -spectroscopic examination of λ3- and λ5-phosphorines supports the theory, that these compounds are to be described as aromatic compounds and as cyclic phosphonium-ylides, respectively. Contrary to simple electronegativity considerations, the phosphorus atom in the λ3- phosphorines is nearly neutral and not positively charged.
Das Reduktionsverhalten von Pentacarbonylpyridin-Komplexen des Chroms, Molybdäns und Wolframs / The Reduction Behaviour of Pentacarbonylpyridinechromium, -molybdenum and -tungsten Complexes
Authors: Kaim Wolfgang 
Published: February 2015

Abstract
The reduction of group VIB metal pentacarbonyl complexes and of iodomethylates of 4- trimethylsilyl-, 4-acetyl- and 4-cyanopyridine has been investigated. Informations on the dissociation of the complexes and on the potential and reversibility of the one-electron reduction were obtained by cyclic voltammetry in DMF, whereas electron spin resonance (ESR) studies of the primary reduction products in the 4-acetylpyridine series revealed the distribution of the unpaired electron. The results suggest that the lowest unoccupied molecular orbital (LUMO) is a ligand centered π*-orbital in the 4-acetyl- and 4-cyanopyridine complexes, thus confirming assignments from photochemistry. The results allow an assessment of both N-coordination and substituent effects at the heterocyclic ligand.
Synthesis and Characterization of Some Transition Metal Complexes of Arylidene Salicyloyl and Benzoyl Hydrazones
Authors: Temerk Y. M. , Ibrahim S. A. , Kamal M. M. 
Published: February 2015

Abstract
Complexes of arylidene salicyloyl- and benzoyl-hydrazones with the 3d metal ions, Cr(III), Mn(II), Fe(III), Co(II), Ni(II) and Cu(II), have been prepared using 2:1 ligand to metal ion ratio. Characterization of the isolated solids was accomplished by IR and electronic spectra, elemental analysis, and molar conductivity measurements. It is concluded that the two Schiff bases function as neutral bidentate ligands and the complexes formed assume a distorted octahedral geometry.
Über das 2.3.6-TriacetyI-5-ethyltoluol und das 2.3.5.6-Tetraacetyltoluol / On the 2,3,6-Triacetyl-5-ethyltoluene and 2,3,5,6-Tetraacetyltoluene
Authors: Riemschneider R. , Hennig K. 
Published: February 2015

Abstract
2,3,6-Triacetyl-5-ethyl-toluene and 2 ,3 ,5 ,6 -tetraacetyl-toluene were prepared by permanganate oxidation of 2,6-diacetyl-3,5-diethyl-toluene. NMR and MS data are given.
1,4-Dithia-2,6-diaza-3,5-diborinane: Ein neues B–N–S-Ringsystem/ 1.4-Dithia-2.6-diaza-3,5-diborinanes: A Novel B – N –S-Ringsystem
Authors: Habben Carl , Meller Anton 
Published: February 2015

Abstract
The novel 1,4-dithia-2,6-diaza-3,5-diborinane ring system results from the reaction of 3,5- dialkyl- (or di-sec.amino-) substituted 1,2,4-trithia-3,5-diborolanes with 1.3-disubstituted sulfurdiimides by replacement of the disulfane bridge. Upon treatment with azomethines, 3,5-dibromo- 1.2.4-trithia-3,5-diborolane gives 3,5-dibromo-1,2-dithia-4-aza-5-diborolidines by substitution of the sulfur atom in position 4. 1H , 11B , 13C, 29Si NMR and mass spectra are reported and discussed.
(η2-Alken)organyIruthenium(II)-KompIexe und Ethyleninsertion in Phenyl-Ruthenium-Bindungen/ (η2-A lkene)organylruthenium (II) Complexes and Ethylene Insertion into Phenyl-Ruthenium Bonds
Authors: Lehmkuhl Herbert , Grundke Jürgen , Schroth Gerhard , Benn Reinhard 
Published: February 2015

Abstract
The reaction of the alkyl-bis(triphenylphosphine)ruthenium complexes 1-3 with ethylene (50 -150 bar) at 70 -100 °C proceeds by initial phosphine dissociation to give the η2-ethylenealkylruthenium compounds 6 -8 . The phenyl-ruthenium complex 4 reacts, under these conditions, by ethylene insertion into the Ph-Ru bond. Subsequent Ru-βH-elimination gives the diastereomeric η2 -styrene-hydrido-ruthenium compounds 10a and b. At low ethylene pressure (5 - 8 bar), 1 - 3 react mainly by orthometallation of a phosphinehenyl group followed by rapid ethylene insertion into the resulting Ph-Ru bond and Ru-βH-elimination to give the diastereomeric complexes 9a and b.
Tris(phosphan)-Nickel(0)-Ethen-Komplexe (dmpe)(PR3)Ni(C2H4). Molekülstruktur des (dmpe)(PØ3 )Ni(C2H4)/ Tris(phosphane)-nickel(0)-ethene Complexes (dmpe)(PR3)Ni(C2H4). Molecular Structure of (dmpe)(PO3)Ni(C2H4)
Authors: Pörschke Klaus R. , Mynott Richard , Krüger Carl , Romão M. J. 
Published: February 2015

Abstract
Synthesis and properties of tris(phosphane)(ethene)nickel(0) complexes (dmpe)(PR3)Ni(C2H4) (R = CH3(4), c-C6H11(5), and C6H5 (6)) are reported. In solution. 4-6 are thermolabile and undergo ligand exchange reactions affording tetrakis(phosphane)nickel(0 ) and bis(phosphane)- (ethene)nickel(0) complexes. 1H, 13C, and 31P NMR data of 4-6 confirm the tetrahedral geometry around nickel. For 6 , the crystal and molecular structure has been determined by X-ray crystallography.
Kristall- und Molekülstruktur von As2P2S7/ Crystal and Molecular Structure of As2P2S7
Authors: Hönle Wolfgang , Wibbelmann Claus , Brockner Wolfgang 
Published: February 2015

Abstract
The crystal and molecular structures of As2P2S7 has been determined by single crystal X-ray diffraction (space group V 21/c; Z = 4; a = 1174.6(16) pm; b = 823.9(7) pm; c = 1140.1(10) pm; β - 94.43(9)°; R = 0.073. The molecule is isosteric to P4S7 and possesses C2v symmetry. Mean bond lengths are: d (As-As) = 250.9 pm; d (As-S ) = 225.7 pm; d(P - S) = 208.3 pm and d(P = S) = 193.2 pm. The observed As -As bond length agrees well with spectroscopic results
Reaktionen von Dithiooxamid mit Chlormethylsilanen/ Reactions of Dithiooxamide with Chlormethylsilanes
Authors: Roesky Herbert W. , Hofmann Hartmut 
Published: February 2015

Abstract
Reactions of dithiooxamide with chloromethylsilanes are leading to different kinds of products. Depending on the conditions and the reaction pathways N,N′-silylsubstituted dithiooxamides, cyclic dithiooxamides and a dithiooximide can be obtained. All products are sensitive to moisture.