bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hochdrucksynthese quaternärer Chalkogenidhalogenide AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I)/High Pressure Synthesis of Quaternary Chalcogenide Halogenides AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I)
Authors: Range Klaus-Jürgen , Hübner Heinz-Joachim 
Published: February 2015

Abstract
Quaternary compounds AB2X3Y (A = Cu, Ag; B = In; X = S, Se, Te; Y = Cl, Br, I) could be synthesized at high pressures and temperatures. The crystal structures found are defect-zincblende (AgIn2Se3I, AgIn2Te3l, CuIn2Se3Br, CuIn2Se3I, CuIn2Te3Cl, CuIn2Te3Br, CuInTe3I), spinel (AgIn2S3Cl, AgIn2S3Br, AgIn2Se3Cl, AgIn2Se3Br, AgIn2Se3l) and defect-rocksalt (AgIn2Te3Cl, AgIn2Te3Br). A second form of CuIn2Se3l is intermediate between the zincblende and spinel structure. A survey of the different reaction pathways of AB-B2X3 mixtures at high pressures and temperatures is given.
Photochemisches Verhalten von (CF3S)2CS in Inertgasmatrix/Photochemical Behavior of (CF3S)2CS in Rare Gas Matrix
Authors: Schlosser Karl , Willner Helge 
Published: February 2015

Abstract
Infrared spectra have been recorded of (CF3S)2CS in the gas and solid phase as well as isolated in noble gas matrix; the Raman spectra of the liquid have also been taken. The analyses of the spectra show that this compound consists of a complex mixture of conformers. By photolysis in a matrix with light of wavelength > 300 nm the distribution of the conformers changes and with light of wavelength > 530 nm this change can be reversed. The threshold for photochemical decomposition in the matrix is about 300 nm. The decomposition products consist of an equimolar mixture of CF3SCF3 and CS2.
Reactions of Dicyanogen and Cyanogen Halides with the Biscyclopentadienyls of Vanadium and Chromium
Authors: Morán Moisés , Gayoso Miguel 
Published: February 2015

Abstract
The oxidative addition of dicyanogen, (CN)2, and of the cyanogen halides, XCN (X = Cl, Br or I), to the biscyclopentadienyl compounds of vanadium and chromium, (η-C5H5)2M (M = V or Cr), leads to the formation of (η-C5H5)2MX(CN) (X = CN, Cl, Br, I; M = V or Cr). The synthesized compounds have been characterized by elemental analyses, IR and EPR spectra, and determinations of the magnetic moments.
He(I) and He(II) Photoelectron Spectra of Some L3MCo(CO)4 Complexes (M = Si, Ge, Sn, Pb and L = Cl, Br and CH3)
Authors: Louwen Jaap N. , Andréa Ronald R. , Stufkens Derk J. , Oskam Ad 
Published: February 2015

Abstract
The He(I) and He(II) photoelectron spectra of L3MCo(CO)4 complexes (M = Si, Ge, Sn, and Pb and L = Cl, Brand CH3) are reported. Bands attributable to the metal-cobalt bond, cobalt 3d and CO orbitals are assigned in agreement with a qualitative MO model. Relativistic effects and He(I)/He(II) intensity ratios prove to be important in assigning these ultraviolet photoelectron spectra.
Hydroxyl Radical-Induced Oxidation of Ethanol in Oxygenated Aqueous Solutions. A Pulse Radiolysis and Product Study
Authors: Bothe Eberhard , Schuchmann Man Nien , Schulte-Frohlinde Dietrich , Sonntag Clemens von 
Published: February 2015

Abstract
γ-Radiolysis of N2O-saturated water or photolysis of aqueous H2O2 provided a source of OH radicals. These radicals react with ethanol by preferentially abstracting an H atom at C-1. In the presence of oxygen these radicals are converted into the corresponding peroxyl radicals.
The a-hydroxyethylperoxyl radicals decay by first order kinetic(k=k1 + k2 [OH-]) acetaldehyde and HO2
˙/H+ + O2 ⨪ being the products (k1 (20 °C) = 50 ± 10 s-1 , Ea = 66 ± 7 kJ·mol-1 , k2= (4± 1) X 109 M-1 s-1). In competition (favoured by low pH, low temperature and high dose rate) they also decay by second order kinetics (2k3 = (7 ± 2) x 108 M-1 s-1). The most important route in the bimolecular decay leads to acetaldehyde, acetic acid and oxygen (ca. 75%). This route might largely be concerted (Russell mechanism), but there might also be a contribution from the disproportionation of oxyl radicals within the solvent cage. There is also a concerted route that leads to two molecules of acetic acid and to hydrogen peroxide (ca. 10%). Another pathway (ca. 15%) yields two oxyl radicals and oxygen. The former may either decompose into formic acid and methyl radicals (ca. 5%) or rearrange into 1,1-dihydroxyethyl radicals (ca. 10%). These radicals add oxygen and the resulting peroxyl radicals rapidly decompose into acetic acid and HO2
˙. The reaction of a-hydroxyethylperoxyl radicals with HO2
˙/O2⨪ radicals appears to be slow (k≈107 M-1s-1).
Stereochemistry and Tautomerism of Amino Acid Antagonists: α,γ-Diketo Acids and Esters and their Cyclisation Products
Authors: Sheldrick W. S. , Trowitzsch W. 
Published: February 2015

Abstract
X-ray structural analyses of two α,γ-diketo esters and one α,γ-diketo acid, which are amino acid antagonists, have shown them all to be present in the solid state in the α,β-unsaturated γ-keto enolic form. The structures of the esters β-acetyl-pyruvic acid methyl ester (1) and 2-oxo-cyclopentyl-glyoxylic acid ethyl ester (3) are stabilized by intra-molecular O···H(-O) hydrogen bonds involving the enol proton. In the case of camphor oxalic acid (4) an intramolecular O···H-O hydrogen bond between the γ-keto oxygen and the acid proton is observed. The bond lengths and angles in 1 indicate a significant contribution from the mesomeric β,γ-unsaturated enol form. For comparison purposes the structure of the γ-enol methyl ether of 1, (4-methoxy-2-oxo-pentene)carboxylic acid methyl ester (2) has also been determined. The X-ray structures of the cyclization products of respectively an α,γ-diketo acid and an α,γ-diketo ester are reported.
ESR-Untersuchungen des Adrenalon-Semichinons und analoger Verbindungen/ESR-Investigations of Adrenalone-Semiquinones and Related Compounds
Authors: Stegmann Hartmut B. , Stolze Klaus , Schelfler Klaus 
Published: February 2015

Abstract
The autoxidation of adrenalone and other 4-acyl-catecholamines in the presence of diorganothalliumhydroxide are investigated by ESR-spectroscopy. On the basis of the counterion splitting and the proton coupling constants as well as the g-values a semi-quinone structure was established. By comparing several monosubstituted o-benzosemi-quinones an increment system for the assignment of the different proton coupling constants was developed. The agreement between experimental and calculated values is good for all compounds investigated. Prolonged autoxidation of adrenalone yields a stable para-magnetic secondary product.
Kobaltinduzierte Synthese von Indolen aus Alkinen und Diaryldiazenen/Cobalt Assisted Synthesis of Indoles from Alkynes and Diaryldiazenes
Authors: Gstach H. , Kisch H. 
Published: February 2015

Abstract
Co(Cl)(PPh3)3 induces formation of 1/1 adducts (indoles) from alkynes and diaryldiazenes while Co(N2)(PPh3)3 gives rise to 2/1 adducts, respectively.
Notizen:Die Kristallstruktur von polymerem Bis (dimethyl- glyoximato) -pyrazin - eisen(II)a/Crystal Structure of Polymerie Bis(dimethylglyoximato)pyrazine Iron (II)a
Authors: Kubel Frank , Strähle Joachim 
Published: February 2015

Abstract
Bis(dimethylglyoximato)pyrazine-iron(II), (dmgH)2Fepyz, crystallizes isotypicly with the Co(II) compound (dmgH)2Copyz in the space group C2/m, the lattice constants being a = 1407, b = 680.0, c = 919 pm, β=125.6°, Z = 2. The structure was determined using the powder pattern. It shows planar (dmgH)2Fe moieties which are polymerized via axially bonded, bridging pyrazine ligands to form a linear chain of symmetry 2/m. The distance Fe-N = 200 pm in the chain is considerably shorter than in (dmgH)2Copyz (Co-N = 224 pm), since the latter has one extra electron in an antibonding orbital.
Synthesis and Characterisation of an [18]Crown-5-Ligand and its NaNCS Complex
Authors: Itter Franz-Albert von , Vögtle Fritz , Weber Gabriela , Sheldrick George M. 
Published: February 2015

Abstract
The new [18]crown-5 ligand -[18] ⟨O5-(2,2′)-diphenylmethano·24 -coronand-5⟩ [1] -, containing a benzylic CH2 group, was prepared by condensation of 2,2'-dihydroxydiphenylmethane with tetraethylene glycol dichloride. The ligand exhibits an endo-conformation and short O···H2C contacts. The macrocycle ligates Na+ by contracting its cavity so that its five O atoms form an approximately regular pentagon.
Triphenylstannyltris(trimethylphosphan)cobalt - Molekülstruktur und Eigenschaften / Triphenylstannyltris(trimethylphosphane)cobalt -Molecular Structure and Properties
Authors: Klein Hans-Friedrich , Ellrich Klaus , Neugebauer Dietmar , Orama Olli , Krüger Karl 
Published: February 2015

Abstract
Potassium cobaltates K+CoLsL' -(L = Me3P, L' = N2, olefin) react with SnCl(C6H5)3 or GeBr(CeH5)3 to give tetracoordinate complexes containing Co-Sn and Co-Ge bonds. Crystal and molecular structures of two single crystals were determined. They show tetrahedral molecules Co[Sn(C6H5)3][P(CH3)3]3 in different packing order. Both tetra-coordinate compounds take up small ligands thereby completing their 18-electron valence shells in compounds Co[E(C6H5)3]L3L' (L = (CH3)3P; E = Ge, L' = CO; E = Sn, L' = CO, C2H4). A sparingly soluble paramagnetic adduct Co[Sn(C6H5)3]L4 is believed to contain a tin-bonded phosphane.
[1]Metallocenophane: 1H-NMR-Untersuchungen / [1]Metallocenophanes: 1H NMR Investigations
Authors: Köpf Hartmut , Klouras Nikolaos 
Published: February 2015

Abstract
The synthesis of a series of [1]metallocenophanes has been achieved. The structure and conformation of these compounds are discussed in the light of their 1H NMR spectra.
Schwefel-Stickstoff-Verbindungen, XII [1]. 19F-NMR-und 13C-NMR-spektroskopische Untersuchung einiger aromatisch substituierter Schwefeldiimide / Sulfur-Nitrogen Compounds, XII [1]. 19F NMR and 13C NMR Spectroscopic Investigation of Some Aromatic Substituted Sulfurdiimides
Authors: Brands Gilbert , Golloch Alfred 
Published: February 2015

Abstract

19F NMR and 13C NMR spectra of the sulfur(IV)diimines R1-NSN-R2 (R1/2 = C6H5, C6F5, C6H5S, C6F5S) and the corresponding N-sulfinylamines R1/2 -NSO are discussed. Chemical shifts are correlated to the electron withdrawing properties of the substituents.
Darstellung und Kristallstruktur des 2:3-Adduktes von Antimontrichlorid und 4-Phenylpyridin, 2 SbCl3 · 3 (C11H9N) / Preparation and Crystal Structure of the 2:3 Adduct of Antimony Trichloride and 4-Phenylpyridine, SbCl3 · 3 (C11H9N)
Authors: Lipka Annegret 
Published: February 2015

Abstract
A congruently melting phase of molar ratio 2:3 was identified in the system SbCl3/4-phenylpyridine. The structure consists of two different types of complex units: One SbCl3 molecule is bonded to one 4-phenylpyridine ligand only, whereas the other one forms a complex with two 4-phenylpyridine ligands. The SbCl3 unit in the 1:1 species is pyramidally shaped, whereas the SbCl3 unit in the 1:2 species displays a T-shaped geometry. The mean angle between the phenyl and pyridyl planes is 33.3°; mean bond lengths are 〈Sb-Cl〉 = 247.6 pm and 〈Sb-N〉 = 241.7 pm.
Zur Darstellung und Struktur des 1.3-Dichloro-5-N.N-dimethylamino-1.3-dithia-2.4.6-triazins / Synthesis and Structure of 1,3-Dichloro-5-N,N-dimethylamino-1,3-dithia-2,4,6-triazine
Authors: Roesky Herbert W. , Schäfer Pierre , Noltemeyer Mathias , Sheldrick George M. 
Published: February 2015

Abstract
The six membered ring of composition (CH3)2NCN3S2Cl2 3 a was prepared from N,N-dimethylguanidinhydrochloride and trithiadiazindichloride. 3 a was characterized on the basis of mass, 1H, 13C NMR spectra and X-ray structure analysis. Crystals of 3 a are monoclinic, space group P21/c, with a = 660.3(6), b = 834.5(7), c = 1774.7(15) pm, β = 112.83(6)° and Z = 4. The C2N unit lies approximately in the plane of the [-CNSNSN-] ring, with both Cl atoms on the same side of the ring.
Diphenylphosphino -α -aminosäureester als Liganden in Palladium(II)-und Platin(II)-Komplexen [1] / Diphenylphosphino-α-Amino Acid Esters as Ligands in Palladium(II) and Platinum(II) Complexes [1]
Authors: Trampisch Herbert , Beck Wolfgang 
Published: February 2015

Abstract
cis-Dichlorobis(chlorodiphenylphosphine)palladium-and platinum(II) react with N-alkyl-α-amino acid esters to give the complexes MCl2[Ph2PN(R)C(H)(R')CO2Me]2 (M = Pd, Pt; R = CH2Ph, i-C3H7; R' = CH3, CH2Ph). With lysine ester dimeric, bis(chelate) complexes

(M = Pd, Pt; R = CH3, C2H5)
have been isolated. The reaction of cis-MCl2(PPh2Cl)2 with cysteine and serine methylester affords the complexes MCl2[Ph2P(X)CH2C(H)(NH2)CO2CH3]2 (M = Pd, Pt; X = O, S).
Zur Struktur von (Pyrazolinonyl)-(hydroxypyrazolylium)methanperchloraten NMR-, IR-spektroskopische Studien und Kristallstruktur / The Structure of (Pyrazohnonyl)-(hydroxypyrazolyhum)methaneperchlorates NMR, IR Spectroscopic Studies and Crystal Structure
Authors: Burschka Christian , Akgün Eyup , Pindur Ulf 
Published: February 2015

Abstract
The structures of 1a-1d were investigated by spectroscopic methods and in the case of la in addition by X-ray diffraction, 1a, vicarious for the compounds 1, is stabilized in solution and in the crystal by an intramolecular hydrogen bond in an eight-membered ring. The IR and NMR spectra show that 1 exhibit a symmetrical structure. In the case of 1 a the molecular structure is affected by unsymmetrical packing and electrostatic effects in the crystal and is therefore approximated best between the forms I and II.
Lösliche Phthalocyaninatometalloxane, Dotierung und Leitfähigkeit / Soluble Phthalocyaninatometaloxanes, Doping and Conductivity
Authors: Metz Josef , Pawlowski Georg , Hanack Michael 
Published: February 2015

Abstract
The polymeric μ-oxo-(tetraalkylphthalocyaninato)-metal IV B derivatives 1 a-d were synthesized by thermal condensation of the monomeric dihydroxo(tetraalkylphthalo-cyaninato)-metal IV B compounds 5 a-d. The high solubility of the metaloxanes 1 a-d enables a homogeneous reaction with the dopant. The electrical conductivities of the undoped and doped compounds are reported.
Derivate des Benzo[1.3]dioxols, 47 [1]. Darstellung und Reaktionen des 4.8-Dimethoxy-bis[1.3]dioxolo[4.5]benzo- [1.2-d; 1′ .2′ -f] [1.3]dioxepins / Derivatives of 1,3-Benzodioxoles, 47 [1]. Preparation and Reactions of 4,8-Dimethoxy-bis[1,3]dioxolo[4,5]benzo- [1,2-d; 1',2'-f][1,3]dioxepine
Authors: Dallacker Franz , Coerver Wim 
Published: February 2015

Abstract
In 1957 some dibenzo[d,f][1,3]dioxepines were isolated from Cercospora kikuchii. We describe the preparation of 4,8-dimethoxy-bis[1,3]dioxolo[4,5]benzo[1,2-d; 1',2'-f][1,3]-dioxepine (3). It shows a high SE-reactivity. Bromination yields the monobromo-and dibromocompounds 3 a and 3 b. Treatment of 3 with copper(II) nitrate leads to the dinitrocompound 3c. With the same reagent 3a gives 3d. Reduction of 3d with hydrogen and Palladium as catalyst yields the mono-amine 3e under bromine loss. Under the same reduction conditions in acetic anhydride 3d and 3c yields 3f respectively 3g.
The carboxylic acid 3i and the aldehyd 3h are prepared by bromine-lithium exchange from 3 a. In the same manner the dibromocompound 3 b is a suitable starting material to obtain the dicarboxylic acid 3k and the dialdehyd 3j. 3j undergoes easily a thiazolium catalysed oin-condensation, yielding the phenanthrenequinone 3l. The cyclic anhydride 3 m can be prepared by heating 3 k in acetic anhydride.
Direkte Lithiierung von BicycIo[3,2,1]octa-2.6-dien / Direct Lithiation of Bicyclo[3,2,1]octa-2,6-diene
Authors: Köhler Frank H. , Hertkorn Norbert 
Published: February 2015

Abstract
Bicyclo[3,2,1]octa-2,6-diene (1) has been lithiated directly with t-butyllithium/TMEDA at low temperature. After quenching with tri-methyltin chloride essentially two stannyl derivatives of 1 were obtained. The stannyl group did not bind to the allylic carbon of 1 as expected but to C-6 and C-7. This has been shown by means of elemental analysis, mass spectroscopy as well as 1H, 13C and 119 Sn NMR spectroscopy.
Über Darstellung und Eigenschaften von Na[η3 -C3H5Fe(NO)(CO)CN] und η3 -C3H5Fe(NO)(CO)CNMe/Synthesis and Properties of Na[η3-C3H5Fe(NO)(CO)CN] and η3 -C3H5Fe(NO)(CO)CNMe (η3 -C3H5 = Allyl)
Authors: Moll Matthias , Seibold Hans-Jürgen , Merbach Peter 
Published: February 2015

Abstract
The allyl iron complexes η3 -C3H5Fe(NO)(CO)L (L = CN-, CNMe) can be obtained by the reaction of η3 -C3H5Fe(NO)(CO)2 with NaN(SiMe3)2 and subsequent methylation.
Verfeinerung der Kristallstruktur von Tripalladium-di-tetrathiophospliat Pd3(PS4)2 Refinement of the Crystal Structure of Tripalladium-di-tetrathiophosphate Pda3(PS4)2
Authors: Simon Arndt , Peters Karl , Hahn Harry 
Published: February 2015

Abstract
The structure of the title compound has been determined by X-ray crystallography. The title compound is synthesized from the elements at 600 °C. Its crystal structure, derived from powder data [3] is refined by single crystal diffractometer data. The structure is trigonal (P3̅ml, α = 684.1(1), c = 724.4(1) pm); Pd2+ cations and PS4
3- anions form a network with an anti-Claudetite (AS2O3) type structure. The PS4 units are distinctly distorted from ideal tetrahedral symmetry. The Pd atoms have a planar environment of 4 S atoms.
Umsetzungen von Monomethylthalliumdiacetat mit Aminen/Reactions of Monomethylthallium Diacetate and Amines
Authors: Knips Ulrich , Huber Friedo 
Published: February 2015

Abstract
Decomposition of MeTl(OAc)2 (Me = CH3, HO Ac = CH3COOH) in methanol in the presence of amines, like 2-, 3- and 4-picoline, benzylamines, dimethylaniline causes mainly N-methylation; the concurring O-methylation of acetate, giving MeOAc, is only of minor importance. The rate of N-methylation increases in the series 2-picoline ≤ pyridine < 3- picoline < 4-picoline ≤ dimethylaniline ≤ dimethylbenzylamine. Picolinic acid and MeTl(OAc)2 (molar ratio 1:1) react to give 25% N-methylpicolinic acid and 75% MeOAc; when the molar ratio was at least 2:1, a 1:1 mixture of N-methylpicolinic acid and the methylester of picolinic acid was produced. These results and rate changes in different solvents are explained by assuming MeT10Ac+ being the active methylthallium electrophile.
Synthesis, IR Spectrum and Crystal Structure of a,a′-Dipyridyldi(iodineazide)/Synthesis, IR Spectrum and Crystal Structure of a,a′-Dipyridyldi(iodineazide)
Authors: Dörner Hans , Dehnicke Kurt , Dehnicke Kurt , Massa Werner , Schmidt Roland 
Published: February 2015

Abstract
The complex [a,a′-dipyridyl(IN3)2] can be prepared by reaction of a,a′-dipyridyl with iodine azide in CH2CI2 solution. It forms stable, yellow, moisture-sensitive crystals of melting point 73 °C. According to the IR spectrum the IN3 molecules are covalently bonded to the N atoms of the dipyridyl via the iodine atoms. The crystal structure determination was carried out by X-ray methods (2127 independent reflexions, R = 3.2%). The complex crystallizes in the space group P21/c with four formula units per unit cell, (a = 1299, b = 726, c -1647 pm; β = 96.1°). The IN3 molecules form linear bridges Nα-I-N to the nitrogen atoms of the pyridyl rings with bond lengths Nα-I 217 pm and Npyr-I 244 pm. The dihedral angle of the pyridyl rings is 63.4°.
Carbonylniobium Chemistry, IV Derivatives of η5 -C5H5Nb(CO)4 with Tridentate Phosphines
Authors: Hoch Martin , Rehder Dieter 
Published: February 2015

Abstract
The photo-induced reaction between CpNb(CO)4 and Ph2P(CH2)2PR(CH2)2PPh2 (L; R = Ph, Cy) yields the chelated five-membered ring complexes cis-[CpNb(CO)2L] (two isomers in the case of R = Cy). The uncordinated PPh2 group reacts with CpNb(CO)3THF to form CpNb(CO)2(μ-L)CpNb(CO)3. IR, 31P and 93Nb NMR spectra are discussed and compared with corresponding data of the analogous vanadium complexes.
Dithiocarbonate and Trithiocarbonate Complexes of Palladium(II); Crystal Structure of Pd(Ph3P)2(CS2O)· CH2Cl2
Authors: Jones Peter G. , Sheldrick George M. , Usón Rafael , Forniés Juan , Usón Miguel A. 
Published: February 2015

Abstract
Di-and trithiocarbonate complexes of palladium(II) have been prepared by the action of O2 or S8 on PdL2(η2 -CS2) in the presence of excess L (L = phosphine ligand). 31P NMR data for Pd(PPh3)2(CS2O) are consistent with the presence in solution of both S̱,S̱ and S̱,O̱ coordinated dithiocarbonate. An X-ray crystal structure of the dichloromethane solvate [P1̄, a = 1103.6(4), b = 1343.4(5), c = 1368.5(5) pm, α = 94.77(3), β = 94.67(3), γ = 113.64(3)°, Z = 2, R = 0.059] suggests that an equivalent disorder may occur in the solid state.
Darstellung und Reaktionen von bicyclischen Verbindungen mit einer Phosphor-Phosphor-Bindung/Preparation and Reactions of Bicyclic Compounds with a Phosphorus-Phosphorus-Bond
Authors: Roesky H. W. , Amirzadeh-Asl D. 
Published: February 2015

Abstract
The reaction of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea with PCl3 leads to the bicyclic compound OP2[MeNCONMe]2 (3) with a direct phosphorus-phosphorus bond and to the bicycle MeNP2[MeNCONMe]2 (4). 3 reacts with tetrachloro-o-benzoquinone (TOB) to yield the spirocycle Ce6Cl4tMeNCONMe]2P2O (5) with a λ4P-λ5P-bond. The Lewis acids SbCl5 and SnCL4 react with 3 to give the adducts 6 and 7. The reactions of 3 with the metal carbonyls Fe2(CO)9, Cr(CO)5THF and Cr(CO)4C7H8 lead to the metal complexes 8-10. The compounds were characterized on the basis of 31P NMR and mass spectra.
The Chemistry of Heteroarylphosphorus Compounds, Part 16.+ An X-Ray Structural Study of (2-Thienyl)bis(2,2′-biphenylylene)phosphorane. A Comparison with Related Methyl and Aryl bis(2,2′-biphenylylene)- spirophosphoranes
Authors: Allen David W. , March Lorraine A. , Nowell Ian W. , Tebby John C. 
Published: February 2015

Abstract
Crystals of the title compound are monoclinic, a= 18.9 93 (11), b = 8.757(5), c= 13.267(8) Å, β = 106.60(5)°, Z = 4 in space group Cc (Cs
4 , No. 9). The structure was determined by Patterson and electron-density methods and refined by least squares techniques to R= 0.081, R′ = 0.085 for 1293 independent reflections classified as observed. The molecule is found to adopt an almost regular trigonal bipyramidal geometry in which the two biphenylylene units span apical-equatorial positions and the 2-thienyl group occupies the remaining equatorial site. The 2-thienyl group, which is disordered, does not lie in the equatorial plane, and there is no indication of C2pπ → P3dπ-t interactions between the heteroaryl group and phosphorus. The steric requirements of the 2-thienyl group appear to be comparable with those of methyl and phenyl groups in bis(2,2′-biphenylylene)spiro-phosphoranes.
Notizen: Zum Verständnis der zentralen Rolle des Schwefels in Multi-Metall-Aggregaten mit verschiedener Elektronenpopulation: [S2WS2CoS2WS2]n- (n = 2, 3)/On the Central Role of Sulfur in Multi Metal Aggregates with Different Electron Populations: [S2WS2CoS2WS2]n-(n = 2, 3)
Authors: Müller Achim , Hellmann Winfried , Schimanski Uwe , Jostes Rainer , Newton William E. 
Published: February 2015

Abstract
The hetero metal sulfur aggregates [Co(WS4)2] n- (with variable electron population: n = 2, 3) could be isolated as salts and characterized by physical measurements (in-cluding X-ray structure analysis). Experimental and theoretical investigations show that due to a strong metal → ligand electron delocalisation WS42-(like MOS4
2-) is a non-innocent ligand and that the additional charge upon reduction is located mainly at the S atoms of the ligand system.
Notizen: The Reaction of Aniline with Isopropylidene-D-glyceraldehyde
Authors: Angrick Michael 
Published: February 2015

Abstract
The reaction of aniline with 2,3-O-isopropyldene-D-glyceraldehyde supplies the dimeric form of the expected Schiff's base which may serve as a model for the initial step of the Maillard reaction.