bluuebunny/crossref_metadata_2025_split huggingface dataset:
Beiträge zur Chemie des Phosphors, 126. Tris(tert-butylphosphino)-phosphan, P(t-BuPH)3 - ein teilsubstituiertes Derivat von iso-P4H6/ Contributions to the Chemistry of Phosphorus, 126. Tris(tert - butylphosphino)phosphane, P(t-BuPH)3 - a Partially Substituted Derivative of iso-P4H6
Authors: Baudler Marianne , Hellmann Jochen , Schmidt Thomas 
Published: February 2015

Abstract
The reaction of tris(bromo-tert-butylphosphino)phosphane, P(t-BuPBr)3, with lithium aluminium hydride leads to the title compound P(t-BuPH)3 (1), which could be isolated in a pure state. 1 is the first partially substituted derivative of iso-tetraphosphane(6), P(PH2)3, and was characterized in all details. Because of the chirality of the Z-BuPHgroups, 1 forms two diastereomers with RRS(SSR)- and RRR(SSS)-configuration in a ratio of about 3:1. The conformation of both isomers, which could be deduced from the 31P NMR parameters, is mainly determined by the steric situation of the molecule.
Barrier to Rotation about Sulfur-Sulfur Bonds in Homocyclic Sulfur Molecules
Authors: Steudel Ralf 
Published: February 2015

Abstract
It is shown that the distances (d) of the 19 longest bonds in 9 homocyclic sulfur rings of type Sn (n = 6-20) depend on the torsional angles (τ) which vary between 0° and 140°. The function d = f(τ) is smallest for τ = 90-100° and largest for τ = 0°; the corresponding bond distance variation amounts to 13 pm or 6%. The height of the torsional cis-barrier is estimated from the enthalpy of formation of gaseous S7 as equal to or smaller than 24 kJ/mol.
Cycloaddition von Schwefelkohlenstoff an die Azidliganden in (Ph3P)2Pd(N3)2 und [Co(N3)4]2–/ Cycloaddition of Carbon Disulfide to the Azide Ligands of (Ph3P)2Pd(N3)2 and [Co(N3)4]2-
Authors: Peter Wolf Peter , Beck Wolfgang 
Published: February 2015

Abstract
(Ph3P)2Pd(N3)2 reacts with CS2 by 1,3-dipolar cycloaddition to give the thiatriazoline- 5-thionato complex (Ph3P)2Pd(N3CS2)2. From the reaction of [Ph4As]2[Co(N3)4] with CS2, the isotliiocyanato complex [Ph4As]2[Co(NCS)4] has been isolated, and the intermediate thiatriazoline-5-thionato complex [Ph4As]2[Co(N3CS2)4] could be detected by its electronic spectrum.
Über neue monocyclische Acyloxyfluoroborane 2.2.6.6-Tetrafluoro-1.4-dialkyl-1.3.5-trioxa-1.6-diboracyclohexene: Darstellung, Molekül- und Kristallstruktur/ New Monocyclic Acyloxyfluoroboranes 2,2,6,6-Tetrafluoro-1,4-dialkyl-1,3,5-trioxa-2,6-diboracyclohexenes: Synthesis, Molecular and Crystal Structure
Authors: Binder Herbert , Matheis Walter , Deiseroth Hans-Jörg , Fu-Son Han 
Published: February 2015

Abstract
Acyloxyfluoroboranes Trimeric alkoxydifluoroboranes (F2BOR)3 (2) react with organic acid anhydrides by substitution of a ring group OR forming monocyclic acyloxyfluoroboranes of the type 2,2,6,6-tetrafluoro-l,4-dialkyl-l,3,5-trioxa-2,6-diboracyclohexene (3). The X-ray crystal structure determination of 3a shows two conformational isomers: two planar and two non-planar six-membered rings are present in the unit cell. The ring conformation is influenced by weak intermolecular H — F interactions.
β-NbBr5, eine neue Modifikation von Niobpentabromid mit einer eindimensionalen Lagenfehlordnung/ β-NbBr5, a New Modification of Niobium Pentabromide Having One-Dimensional Stacking Disorder
Authors: Müller Ulrich , Klingelhöfer Paul 
Published: February 2015

Abstract
While trying to react NbBr5 with sulfur in a closed tube, crystals of the new modification β-NbBr5 were obtained. Its X-ray diffraction patterns have sharp reflexions and diffuse streaks showing the presence of a one-dimensional disorder. From the sharp reflexions alone, a statistically averaged sub-structure results; it has the space group Ccmm and the lattice constants a0 = 644, b0 = 1867 and c0 = 615 pm. Taking into account the diffuse streaks, the true structure was deduced; its lattice constants are a = 2a0, c = Co, b indefinite due to the disorder. β-NbBr5 is isostructural to tantalum pentaiodide. It consists of layers of (NbBr5)2 molecules that are stacked with displacement faults in the direction of b. The bromine atoms have a hexagonal close-packing arrangement.
Transition Metal Complexes with Sulfur Ligands, IV. Synthesis and Reactions of Mo (IV) Complexes with the Tetradentate Thioether-thiol Ligand 2,3,8,9-Dibenzo-1,4,7,10-tetrathiadecane
Authors: Kaul Bharat B. , Sellmann D. 
Published: February 2015

Abstract
Synthesis and characterization of non-oxo Mo(IV) complexes with the tetradentate thioether-thiol ligand 2,3,8,9-dibenzo-1,4,7,10-tetrathiadecane(dttd-H2) are reported. MoCl4(THF)2 reacts with dttd-H2 in THF at room temperature to give the paramagnetic (2.61 BM, 295 K) [Mo(dttd)Cl2]. The chlorine ligands in [Mo(dttd)Cl2] can be substituted by sulfur ligands yielding diamagnetic complexes as [Mo(dttd)(CeH4S2)], [Mo(dttd)(SC2H4S)] and [Mo(dttd)(SC2H5)2]; with Na2S, NaHS or H2S, the di-μ-sulfido bridged complex [(dttd)Mo(S)2Mo(dttd)] is obtained. The reduction of [Mo(dttd)Cl2] by various reducing agents in the presence of CO or NO yields labile carbonyl and nitrosyl species in solution. In contrast to [Mo(dttd)Cl2], the complexes with MoSe cbromophores showed no reactivity to CO or NO under reducing conditions.
Zur Stereochemie von Diazadien-Metall-Komplexen, V. Molekülstrukturen und CO-Kraftkonstanten nicht-starrer Chrom-, Molybdänund Wolframcarbonylderivate DAD M(CO)3(*CO) (*C0 = 12CO, 13CO, C180)/ Stereochemistry of Diazadiene Metal Complexes, V Molecular Structures and CO Force Constants of Non-Rigid Chromium, Molybdenum and Tungsten Carbonyl Derivatives DAD M(CO)3(*CO) (*CO = 12CO, 13CO, C18O)
Authors: Dieck Heindirk tom , Mack Thomas , Peters Karl , Schnering Hans-Georg von 
Published: February 2015

Abstract
Diazadiene metal tetracarbonyls, DAD M(CO)4, (M = Cr, Mo, W; DAD = R-N = CH-CH = NR with aliphatic and aromatic substituents R) show equidistribution of one labelled CO when synthesized from fac-DAD M(CO)3(CH3CN) as a consequence of intramolecular CO site exchange. The structures of two Mo-complexes (1: R = iso-propyl; 2: R = 2,6-diisopropylphenyl) with DAD's of different bulkiness have been solved by X-ray methods. From the infrared solution spectra, including those of isotopically labelled (13CO, C18O) compounds, all of the force constants k1, k2, ktt, kcc and kcc have been calculated independently. The ratios of interaction force constants deviate sharply from Cotton-Kraihanzel assumptions, perhaps because of the substantial deviation of the iraws-pair of CO groups from linearity (1: 154.5°, 2: 147.9°). The solid state N-Mo, Mo-C and C - O bond lengths are neither in agreement with the generally accepted picture for donor/acceptor influences nor with typical IR data and force constant interpretations. (2 with higher v(CO) and k1, k2 has the longer CO bonds and shorter Mo-C bonds than 1.)
The force constant sets have been used to calculate CO frequencies for over 60 labelled compounds with good accuracy (Δv < 2 cm-1).
Übergangsmetall-Carben-Komplexe, CXXXI. Umsetzung von [(CO)5WCNEt2]BF4 mit anionischen Organylverbindungen von Elementen der V. Hauptgruppe/ Transition Metal Carbene Complexes, CXXXI. Reaction of [(CO)sWCNEt2]BF4 with Anionic Organyl Compounds of Group V Elements
Authors: Fischer Ernst Otto , Reitmeier Rudolf 
Published: February 2015

Abstract
The cationic carbyne complex [(CO)5WCNEt2]BF4 (1) reacts with potassiumdiphenylamide, KNPh2, with nucleophilic addition of the amide anion to give (CO)5W[C(NEt2)NPh2] (2). The corresponding reactions with KPPh2, KPEt2, KPMePh, NaSbPh2 and NaBiPh2 yield the complex [(CO)5W(CNEt2)]2 (3), which is formed by reductive dimerization of two carbyne fragments. In case of KPMePh the carbene complexes (CO)5W[C(NEt2)PMePh (4) and trans-(MePhPH)(CO)4W[C(NEt2)PMePh] (5) are also obtained. On warming in solution 5 spontaneously rearranges to the novel cyclic carbene complex

(6). Reaction conditions, properties and spectroscopic data of the new compounds are reported.
Übergangsmetall-Carbin-Komplexe, LXXIY. Synthese thermisch stabiler neutraler Carbin-Carbonyl-Komplexe von Chrom, Molybdän und Wolfram mit den zweizähnigen Liganden 2.2′ -Bipyridyl und 1.10-Phenanthrolin/ Transition Metal Carbyne Complexes, LXXIV. Synthesis of Thermostable Neutral Carbyne Carbonyl Complexes of Chromium, Molybdenum, and Tungsten with the Bidentate Ligands 2,2′-Bipyridyl and 1,10-Phenanthroline
Authors: Filippou Alexander , Fischer Ernst Otto 
Published: February 2015

Abstract
Reaction of trans-bromotetracarbonyl(phenylcarbyne)-complexes of chromium, molybdenum and tungsten and trans-bromotetracarbonyl(methylcarbyne) complexes of chromium and tungsten with the bidentate ligands 2,2′-bipyridyl and 1,10-phenanthroline results in the replacement of two carbonyl groups leading to very thermostable carbyne complexes with the general formula Br(CO)2LMCR (L: 2,2′-bipy, ophen; M: Cr, Mo, W; R : CH3, C6H5).
η3-Allylmetall-Schwefel-Komplexe, V. Mono- und bimetallische, mehrkernige η3-Allylmetall-Sehwefel-Komplexe des Nickels, Palladiums und Platins/ η3-Allylmetal-Sulfur Complexes, V. Mono- and Bimetallic, Polynuclear η3- Allylmetal-Sulfur Complexes of Nickel, Palladium and Platinum
Authors: Bogdanović Borislav , Göttsch Peter , Rubach Martin 
Published: February 2015

Abstract
η3-Allylhydrogensulfidopalladium (6) reacts with bis-(η3-allyl)- (4) or η5-cyclopentadienyl-η3-allyl-palladium (11) with elimination of propene to give the known η3-allylpalladium- sulfur-cluster (2). The same method was used to prepare the first bimetallic η3-allyl-Ni-Pd-, Ni-Pt- and Pd-Pt-sulfur complexes 12-14 (IR-spectra); their structures are still unknown. The polynuclear η3-methally Ipalladium- and -platinum-sulfur complexes 2 a and 3 a, soluble in benzene and toluene, have been prepared from the corresponding bis(η3-methallyl)metal compounds and H2S. In benzene, 2 a may have a structure in which the four palladium atoms adopt a square planar (2a′) or tetrahedral (2a″) geometry.
η3-Allylmeta]l-Schwefel-Komplexe, VI. Anionische η3-Allylnickel- und -palladium-Schwefel-Cluster/ η3-Allylmetal-Sulfur-Complexes, VI. Anionic η3-Allylnickel- and -palladium-Sulfur-Clusters
Authors: Benn Reinhard , Bogdanović Borislav , Göttsch Peter , Rubach Martin 
Published: February 2015

Abstract
η3-Allylhydrogensulfidonickel (2) reacts with n-butyllithium with elimination of lithium sulfide and formation of the ionic η3-allylnickel-sulfur-cluster [(η3-C3H5Ni)3S2]+[Li(THF)2]- (4). The crystal structure of the analogous THF-TMEDA-adduct (4′) indicates that the nickel and sulfur atoms of the anion adopt a trigonal bipyramidal arrangement, in which the sulfur atoms are at the apices of the bipyramid. The Li(THF)2+ cation in 4 can be replaced by the (n-C4H9)4N+ cation (5). The 1H NMR spectra suggest the presence of two stereoisomers of the anionic clusters in 4 and 5 having C3h and Cs symmetry. In the reaction of η3-allyl- or η3-methallylhydrogensulfidopalladium (6, 6 a) with n-butyl-lithium crystalline compounds having the composition RC3H4PdSLi(THF)≈4, R = H, CH3 (7, 7 a) are obtained; their 1H NMR spectra also reveal the existence of the two stereoisomers having C3h and Cs symmetry. The same type of stereoisomerism is observed with the crystalline [(n-C4H9)4N]+[(η3-C3H5Pd)3S2]- (8) obtained from 7 and (n-C4H9)4N+ClO4
-. For 7 and 7 a an ionic structure consisting of trigonal bipyramidal (η3-RC3H4Pd)3S2- anions and Li3S(THF)4+ cations is proposed.
Gasphasen-Reaktionen, 35. Benzseleniren als kurzlebiges Zwischenprodukt in der Pyrolyse von 1.2.3-Benzoselenodiazol zu 6-Fulvenselon/ Benzselenirene as Short-lived Intermediate in the Pyrolysis of 1,2,3-Benzoselenodiazole to 6-Fulvenselone
Authors: Bock Hans , Aygen Sitki , Solouki Bahman 
Published: February 2015

Abstract
In the pyrolysis of 1,2,3-benzoselenodiazole using a short-distance furnace, a short-lived intermediate is detected photoelectron spectroscopically. Mass spectra recorded under similar conditions suggest an isomer C6H4Se rearranging to the more stable final product 6-fulveneselone. The ionization pattern obtained by computerized spectra stripping is assigned to benzselenirene by molecular radical cation state comparison based on MNDO calculations.
Untersuchungen über Substituenten-Einflüsse auf die reduktive Eliminierung des Biphenyl-Systems aus cis-Bis(aryl)bis(triphenylphosphan)platin(II)-Verbindungen/ Influence of Substituents on the Reductive Elimination of the Biphenyl-System from cis-Bis(aryl)bis(triphenylphosphane)platinum(II) Compounds
Authors: Bayer Ulrich , Brune Hans Albert 
Published: February 2015

Abstract
Compounds cis-[Pt(PPh3)2(3-X-C6H4)2] [X = F, Cl, CF3, CH3O, (CH3)2N] and cis- [Pt(PPh3)2(3-X-C6H4)(Y-C6H4)] [X = F / Y = H, 4-F, 4-CF3, 4-CH3O; X = Cl/Y = 4-F; X = CF3 /Y = 4-F; X = CH3O/Y = 4-F] have been synthesized and studied thermally with respect to the reductive elimination of disubstituted biphenyls. Activation parameters ⊿H≠ and ⊿S≠ are reported and discussed.
Zur intermediären Existenz von Ethylenfluoronium-Ionen in der Gasphase/ On the Intermediary Existence of Gaseous Ethylen Fluoronium Ions
Authors: Ciommer Bernhard , Schwarz Helmut 
Published: February 2015

Abstract
The long-sought ethylen fluoronium ion (2) is generated as an intermediate in the dissociative ionization of 1-fluoro-2-(p-methyl)phenoxy ethane (4). However, prior to collisionally induced dissociation 2 undergoes ring-opening, associated with hydrogen migration, to form 1-fluoroethyl cation (3). Other decomposition pathways of the molecular ions of 4 involve (i) direct formation of 3 via a combination of C-O-cleavage (loss of ArO -) and [1,2] hydrogen migration (18%) and (ii) complete positional loss of the a-and β-methylene hydrogen atoms (34%). The remaining 48% of the molecular ions of 4 dissociate via anchimeric assistance of the fluorine in the elimination of ArO·, thus giving rise to the formation of 2.
Amino Acids as Substrates in the Synthesis of Substituted Organocobalamins
Authors: Maihub Abdussalam , Grate Jay W. , Xu Hui Bi , Schrauzer Gerhard N. 
Published: February 2015

Abstract
The amino acids alanine, valine, leucine, isoleucine, norvaline, α-amino butyric acid, and β -methyl aspartic acid are utilized as substrates for organocobalamin syntheses under “oxidizing/reducing” conditions. In the presence of V+3 as the reducing agent, free radicals are generated by the reaction of oxygen radicals with the amino acids through hydrogen atom abstraction. These amino acid radicals then combine with the cobalt atom of vitamin B12r to yield the respective organocobalamins. The cobalamin obtained from the reaction of β-methyl aspartic acid is a possible intermediate in the coenzyme B12 dependent skeletal rearrangement of β-methyl aspartic acid to glutamic acid. HPLC analysis of the cobal-amins prepared from D, L-alanine indicates that the corrin ligand is relatively ineffective at promoting asymmetric syntheses under these conditions.
[4 + 2] -Photocycloaddition eines Organoeisendienophils mit 1.3-Dienen/ [4 + 2]-Photocycloaddition of an Organoiron Dienophile with 1,3-Dienes
Authors: Battaglia R. , Frazier C. C. , Kisch H. 
Published: February 2015

Abstract
A tricyclic 1,1,1-tricarbonyl-2,3,1-diazaferrole derivative (1) reacts photochemically with 1,3-dienes with formation of [4 + 2]-cycloadducts. Introduction of substituents in the 1- or 1,4-positions of the diene or of electron releasing groups in the dienophile results in an inhibition of the cycloaddition. The reaction proceeds stepwise via photodissociation of carbon monoxide, coordination of the diene to iron, intramolecular photocycloaddition, and re-uptake of carbon monoxide. No cycloaddition occurs if the complexed diene is allowed to react thermally. X-ray structural analyses of 1 and its cycloadduct with 2,3-dimethylbutadiene (3d) reveal the presence of a novel type of three electron metal - diazene bond for both compounds and delocalized bonding for the diazaferrole 1.
Notizen: Synthesis of Trialkylstannanedithi ocarboxy lato Rhenium(I) Complexes [1]
Authors: Hättich Thomas , Kunze Udo 
Published: February 2015

Abstract
Novel trialkylstannanedithiocarboxylato complexes are formed in a one-pot reaction of R3SnCS2Li (R = benzyl, methyl, cyclohexyl) with BrM(CO)5 (M = Mn, Re) in a THF/dioxane solution. Tetracarbonylmetal species could be detected by IR spectroscopy in all cases. The more stable rhenium chelate complexes, R3SnCS2Re(CO)4, were isolated by chromatographic separation as yellow, low-melting solids with 10-20% yield.
Notizen: Photodimerisierung von 6-trans-Styryl-4- methoxy-2-pyr on ( = 5.6-Dehydrokawain) und cis-Isomerisierung von ( ± )-Kawain/ Photodimerisation of 6 -1 rans-Styry 1 - 4 - methoxy- 2 - pyrone ( = 5,6-Dehydrokawain) and cis-Isomerisation of (±)-Kawain
Authors: Kaloga Macki , Christiansen Ilona 
Published: February 2015

Abstract
The photochemical transformation of 5,6-Dehydrokawain (1) to rel-(lR,6S,7S,8S)-5-methoxy-7-phenyl-8-[6-(4-methoxy-2-pyronyl)]-1-(E)-styryl-2-oxabicyclo[4,2,0]octa-4-en-3-one (2) by irradiation with a light bulb [1] is con-firmed. Kawain (3) turns out to be resistent to photochemical reaction in several tests. During irradiation by a Hg-lamp a transformation to cis-Kawain (4) takes place, however.
Über Oxoplumbate(IV) Die Kristallstruktur von HT-Li2PbO3 [1] The Crystal Structure of HT-Li2PbO3 [1] / On Oxoplumbates(IV) The Crystal Structure of HT-Li2PbO3 [1]
Authors: Brazel Berthold , Hoppe Rudolf 
Published: February 2015

Abstract
Single crystals of HT-Li2PbO3 have been prepared by heating of mixtures of Rb2PbO3 and Li2O [Ag-cylinders, 600 °C, 100 d]. The structure determination [1005 symmetry independent l0(hkl), R = 5.85%, Rw = 5.35%, confirms space group C2/c with a = 548.60(16), b = 949.51(22), c = 1027.35(27) pm, β = 100.11(3)°, drö = 6.78 g · cm-3 , dpyk = 6.80 g · cm-3 , Z - 8. The NaCl-type structure variant is characterized by alter-nating layers of Li+ and Pb4+ /Li+ cations, which are all octahedrally coordinated. Effective Coordination Numbers, ECoN are calculated via Mean Fictive Ionic Radii, MEFIR.
Phases of Decaphenylcyclopentagermane (Ph2Ge)5 [1] / Phases of Decaphenylcyclopentagermane (Ph2Ge)5 [1]
Authors: Roß Ludwig , Dräger Martin 
Published: February 2015

Abstract
(Ph2Ge5) can be obtained from solutions in five crystalline phases, two pure and three including solvent of crystallization. This is lost at 70 °C. At 190 °C all phases transform into a plastic crystalline phase. For this tetragonal phase a gear wheel model for librations of the molecules is developed. The crystal structure of triclinic (Ph2Ge)5 has been determined and refined to R = 0.050. The molecule has a flexible conformation in accordance with a better solubility than exhibited by the homologous rings (Ph2Ge)4 and (Ph2Ge)6 containing rigid normal conformations. The arrangement of phenyl groups is either parallel or perpendicular for both cases intra- and intermolecular. The compound (Ph2Ge)6 attains a plastic crystalline state at 346 °C.
Über Hydraziniumsalze von Iodoplatinaten / On Hydrazinium Salts of Iodoplatinates
Authors: Thiele Gerhard , Wittmann Kurt 
Published: February 2015

Abstract
The new compounds (N2H5)2PtI6 and (N2H5)2PtI5 · H2O were obtained by reaction of H2PtCl6 with N2H5CI and HI in aqueous solutions. In the crystal structure of the ortho - rhombic bis[hydrazinium(+I)]hexaiodoplatinate(IV) (N2H5)2PtI6 the N2H5+ cations and PtI6
2- anions build up a K2PtCl6- like arrangement. Bis[hydrazinium(+I)]pentaiodoplatinate( II,IV)hydrate, (N2H5)2Ptl5 · H2O, is classed with the group of linear chain mixed-valence platinum complexes which have highly anisotropic properties. In the crystal structure are structurally undistinguishable PtI4-units (Pt-I = 264 pm) connected by asymmetric I-bridges (Pt-I = 270 pm and 338 pm) to 1 [PtI4I2/2] chains.
Darstellung und spektroskopische Charakterisierung von Hexachloroosmat(V) / Preparation and Spectroscopical Characterisation of Hexachloroosmate(V)
Authors: Preetz W. , Bruns M. 
Published: February 2015

Abstract
(TEA)[OSCl6] is formed quantitatively by heating solid trans-(TEA)[OsX4(CO)2] (X = Br, I) in a stream of chlorine at 120 °C, and can be purified by recrystallisation from CH2Cl2 without decomposition. It is reduced immediately by acetone, methanol, Cl-, Br-, I- to give [OsCl6]2-. The standard potential [OsCl6]-/[OsCl6]2- in acetonitrile referred to the saturated mercury-mercurous sulphate electrode is 0.840 V. The IR and Ra bands of (TEA)[OsCl6], assigned according to point group Oh, are shifted to higher frequencies compared with (TEA)2[OsCl6]. The excitation at 488.0 nm gives a resonance Raman spectrum exhibiting 6 overtones of vi and combination tones up to 4ν1 + v5. The electronic absorption spectrum shows five spin-forbidden intraconfigurational transitions coupled with odd vibrational modes in the near infrared region. The spin-allowed 4A2g → 4T2g,4T1g-transitions are observed at 347 and 305 nm. The excited levels can be fitted with the parameters ⊿ = 28500 cm-1, B = 340 cm-1, ξ = 2500 cm-1 , allowing to calculate the nephelauxetic ratio β55 to 0.47. In the visible region extensive charge transfer transitions are observed. Based on the strong oxidizing character of Os(V) there is a bathochromic shift of corresponding bands of [OsCl6]- in relation to [OsCl6]2- of about 6600 cm-1 and to the isoelectronic [ReCl6]2- of about 13700 cm-1, respectively. From πt1u→dt2g the optical electronegativity is calculated to Xopt(Osv) = 2.49.
Beiträge zur Chemie des Bors, 133 [1] Molekül-und Kristallstruktur von Tris(methylanilido)boran / Contributions to the Chemistry of Boron, 133 [1] Molecular and Crystal Structure of Tris(methylanilido) Borane
Authors: Nöth Heinrich 
Published: February 2015

Abstract
The title compound crystallizes in the rhombohedral space group R3, Z = 1. The boron atom occupies a special position on the threefold axis therefore imposing C3 symmetry to the molecule. The C2BN plane is twisted relative to the BN3 plane by 37.1°, and the BN bond length of 144.8(3) pm is on the upper limit of BN bond lengths found for other triaminoborane systems.
Chromatographische Trennung schwefelhaltiger Heterocyclen der Typen (CH2)nSm und SenS8-m mittels HPLC [1] / Chromatographie Separation of Sulfur Containing Heterocycles of Type (CH2)nSm und SenS8-m by HPLC [1]
Authors: Steudel Ralf , Strauss Eva-Maria 
Published: February 2015

Abstract
The Separation of a number of cyclic methylene sulfides and selenides by reversed-phase high-pressure liquid chromatography is reported. The retention times as well as the capacity factors depend in a systematic way on the ring size, the number and kind of chalcogen atoms, and the number of heteronuclear bonds within the ring. These relation-ships are used to assign the chromatograms of cyclic selenium sulfides of type SenS8-n (n = 1-8) prepared in a new reaction from Se2Cl2, SCl2 and potassium iodide and containing all selenium atoms in neighboring positions.
Synthese und Struktur von C5Me5Pd(PR3)X: Palladiumkomplexe mit einem unsymmetrisch gebundenen Pentamethylcyclopentadienylring [1] / Synthesis and Structure of C5Me5Pd(PR3)X: Palladium Complexes with an Unsymmetrically Bonded Pentamethylcyclopentadienyl Ring [1]
Authors: Kraus H.-J. , Werner H. , Krüger C. 
Published: February 2015

Abstract
The complexes C5Me5Pd(PR3)X (1-4) are prepared from [Cl(PR3)Pd]2(μ-OCOCH3)2 and TIC5Me5. Attempts to replace the halide ligand by a second C5Me5 or a C5H5 unit remained unsuccessful. The X-ray structure analysis of C5Me5Pd[P(i-Pr)3]Cl (3) indicates that the five-membered ring shows a tendency of η1-bonding towards the metal.