bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthese und Eigenschaften von Pentaazadienido-Komplexen des zweiwertigen Cobalts. Kristallstruktur von [Co(OCH3)(tolNNNNNtol)]6 · 2C9H12
Authors: Schmid Raimund , Beck Johannes , Strähle Joachim 
Published: March 2015

Abstract
Co(tolNNNNNtol)2 (1) is obtained from solutions of 1,5-di-p-tolyl-1,4-pentaazadiene und CoCl2 - 6H2O in aqueous ammonia. It is a paramagnetic, explosive, red com pound which reacts with alcohols to the alcoholates Co(OR)(tolNNNNNtol). The methoxy complex is hexameric. It crystallizes from mesitylene/methanol as [Co(OCH3)(tolNNNNNtol)]6 · 2C9H12 in the triclinic space group P1̄ with the lattice constants: a = 1667.1(5), b - 1784.2(5), c = 2159.2(6) pm, α = 93.05(3)°, β = 96.10(2)°, γ = 64.63(2)°, Z = 2. In the hexameric complex six Co atoms and six methoxy groups form a central twelve membered Co - O ring with a symmetry close to D3d. The pentaazadienide ligands act as additional bridges between two Co atoms, coordinating one Co atom monodentate with N1 and the other Co atom bidentate with N3 and N5. This leads to alternating tetrahedral and octahedral coordination of the Co atoms. The average Co-O distances are 192,3 pm in the CoO2N2 tetrahedron and 198,0 pm in the CoO2N4 octahedron. The corresponding Co-N distances are 206.3 and 221.4 pm respectively. In the planar N5 zigzag chain slightly elongated double bonds N1 - N2 and N4 -N5 of 128.2 pm and partial double bonds N2 -N3 and N3 -N4 of approximately 134.6 pm are observed.
Crystallographic Studies and Physicochemical Properties of π-Electron Systems, Part 7 Refinement of the Crystal and Molecular Structure of p-N,N-Dimethylaminobenzoic Acid, Full ab initio STO-3G Optimization of its Molecular Geometry, and Empirical Analysis of Substituent Effects on the Geometry of Benzene Rings in p-Substituted Benzoic Acids
Authors: Anulewicz R. , Häfelinger G. , Krygowski T. M. , Regelmann C. , Ritter G. 
Published: March 2015

Abstract
The crystal and molecular structure of N,N -dimethylaminobenzoic acid (DABA ) was redetermined by means of X-ray diffraction. Crystal data are: Mr = 165.2, triclinic, P1̄, a = 6.651(2) Å , b = 8.045(2) Å , c = 8.609(2) Å , α - 88.97(3)°, β = 94.72(3)°, γ = 113.76(3)°, V = 420.13 Å3, Z = 2, Dm = 1.28 g cm-1, Dx = 1.306 g cm-1; CuKα: λ = 1.54178 Å, μ = 6.74 cm -1, F(000) = 176.00, T - 293 K; R = 0.0684, Rw = 0.0780 for 1185 observed reflections. The DABA molecules are almost planar and form cyclic dimers exhibiting no orientational disorder with separation of oxygen atoms RO...O - 2.627(2) Å . The pattern of molecular geometry in DABA suggests a relatively strong through-resonance effect between the NMe2 and COOH groups and shows non-additivity of substituent effects on valence angles and bond lengths in the ring. Mesomeric equalization of CO bond lengths in the carboxylic groups of 10 well solved p-substituted benzoic acids is found to depend linearly on the RO...O distance in H-bridged dimers. Full abinitio STO -3G optimizations of molecular geometries for monomers of DABA , p-aminobenzoic acid, benzoic acid, and formic acid as well as for aniline and N,N -dimethylaniline show resonable agreement with experimental data. Changes of molecular geometries on formation of planar H-bridged dimers have been obtained from calculations for benzoic acid dimers, benzoic - formic acid complex, and formic acid dimers. The latter was also optimized using the 6 -31 G basis set.
Die Kristallstruktur von Bis(η-cyclopentadienyl)titana(Ti,IV)- cyclohexaselenan, Cp2TiSe5
Authors: Fenske Dieter , Adel Jörg , Dehnicke Kurt 
Published: March 2015

Abstract
Cp2TiSe5 has been prepared by the reaction of trim ethyltetradecylammonium-polyselenide with Cp2TiCl2 in ethanol solution and subsequent extraction of the dry residue with dichloromethane. Cp2TiSe5 crystallizes in the space group P1 with two formula units in the unit cell (2559 observed, independent reflexions, R = 0.074). The cell dimensions are a = 808.6, b = 822.6, c = 1190.7 pm, α - 96.28°, β - 106.06°, γ = 108.78°. The structure consists of discrete Cp2TiSe5 molecules with the TiSe5, ring in the chair conformation.
Die Kristallstruktur von Gd2B5/ The Crystal Structure of Gd2B5
Authors: Schwarz Christine , Simon Arndt 
Published: March 2015

Abstract
Gd2B5 is synthesized from Gd and B in the presence of GdCl3 as a flux. The compound crystallizes in the monoclinic space group P21/c with a = 713.6(1), b = 715.9(1), c = 718.3(1) pm and β =102.68(1)°. The structure consists of a 3-dimensional framework of Bft-octahedra and two types of B2-units enclosed in 32434-nets of Gd atoms. The different B -B-distances are discussed in terms of connectivity and Pauling bond orders.
Donor-Akzeptor-Komplexe von WCl3(N3S2) und WBr3(N3S2). Die Kristallstruktur von WCl3(N3S2) ·THF/ Donor Acceptor Complexes of WCl3(N3S2) and WBr3 (N3S2).The Crystal Structure of WCl3(N3S2)·THF
Authors: Khabou Abderraouf , Willing Wolfgang , Müller Ulrich , Dehnicke Kurt 
Published: March 2015

Abstract
The donor acceptor complexes WC13(N 3S2)-L (L = TH F, pyridine), and [WCl3(N3S2)]2 · dipy are prepared from WCl3(N3S2) and the corresponding donor molecules. WBr3(N3S2) ­ THF is formed by the reaction of WCl3(N3S2) THF with BrSiMe3. The complexes have been characterized by their IR spectra. The crystal structure of WCl3(N3S2) THF was determ ined by X-ray diffraction. It crystallizes monoclinically in the space group P21/c with four formula units per unit cell (1903 observed, independent reflexions, R = 0.031); the cell dimensions are a = 1072.0. b = 1007.2, c = 1128.9 pm; β = 94.84°. The tungsten atom is a member of a nearly planar WN3S2 ring with WN bond distances of 180 and 184 pm, which correspond to double bonds. The sixfold coordination of the W atom is completed by three chlorine atoms and the O atom of the tetrahydrofuran ligand, which is coordinated in trans-position to one of the N atoms; the THF molecules forms a dihedral angle of 40.1° with the WN3S2 ring.
Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: EA[C6(NO2)2O4] · H2O (EA = Ca, Sr)/ Complexes with Substituted 2,5-D ihydroxy-p-benzoquinones: EA [C6(NO2)2O4] · 4H2O(EA = Ca, Sr)
Authors: Robl Christian 
Published: March 2015

Abstract
Single crystals of EA[Q(NO2)2O4] · 4H2O (EA = Ca. Sr) were grown in aqueous silicagel. Ca2+ has CN 8. It is surrounded by 4 oxygen atoms of two bis-chelating [C6(NO2)2O4]2- ions and 4 water molecules, which form a distorted, bi-capped trigonal prism. Sr2+ is coordinated similarly, with an additional water molecule joining the coordination sphere to yield CN 8+1. Corrugated chains extending along [010] and consisting of EA2+ and nitranilate ions are the main feature of the crystal structure. Adjacent chains are interlinked by hydrogen bonds.
Chemische Effekte der Nitrosylsubstitution in hexakoordinierten Carbonylwolfram-Verbindungen/ Chemical Effects of Nitrosyl Substitution in Hexacoordinated Carbonyl Tungsten Complexes
Authors: Kundel P. , Berke H. 
Published: March 2015

Abstract
The reaction of mer-tricarbonyl-nitrosyl-bis(triisopropylphosphite)tungsten hexafluorophosphate (1a) with MeMgl or Bu4NI affords tricarbonyl-iodonitrosyl-(triisopropylphosphite)tungsten (2). Similarly, a carbonyl group of la can be replaced by a fluoride ion resulting in transdicarbonyl- fluoronitrosyl-bis(triisopropylphosphite)tungsten (3). Oxygen nucleophiles like OPh- , OCH3
- or OH- either substitute or attack a carbonyl group in la and cause formation of dicarbonyl-nitrosyl-bis(triisopropylphosphite)tungsten phenoxide. methoxide or formate derivatives (4, 5 or 7). respectively. Nitrite ions react with la under CO substitution and bind as nitro ligands to the tungsten center. Addition of equivalent amounts of MeLi, PhLi and NaBH4 to la leads to the formation of tricarbonyl-nitrosyl-(triisopropylphosphite)tungsten methyl and hydrido compounds (8a, 11a) as well as to dicarbonylnitrosyl-bis(triisopropylphosphite)tungsten methyl, phenyl and hydrido complexes (8b, 10 and 11b ) . In the presence of an excess of MeLi., la is transformed to a β-diketonate derivative 9.
Montanin G, Neo-Clerodane Diterpenoid from Teucrium montanum
Authors: Malakov Peter Y. , Papanov Georgi Y. 
Published: March 2015

Abstract
A new neo-clerodane diterpenoid, montanin G was isolated as a minor compound from the aerial parts of teucrium montanum var. scorpilii. Its structure 19.6α-diacetoxy-3β-hvdroxy- 4α . 18:15,16-diepoxy-neo-clerodane-13(16).14-dien-20.12R-olide was established by chemical and spectroscopic means and by correlation with teupireinin.
Metal Complexes with Tetrapyrrole Ligands, XLV. The Mercuration of Nickel(II), Palladium(II), and Platinum(II) Porphyrins
Authors: Buchler Johann W. , Herget Gerhard 
Published: March 2015

Abstract
The mercuration of 5,10,15,20-tetrakis(4-methylphenyl)porphyrin complexes M(TTP)** (2a-c; M = Ni, Pd, Pt) is described. Treatment of Ni(TTP) (2a) with mercuric acetate in refluxing benzene and subsequently with aqueous sodium chloride yields a mixture of species M(TTP-HgnIn) (1 < n < 3) from which the monomercurial, Ni(TTP-HgCl) (3a) is isolated in 35% yield after silica chromatography. A more rapid reaction occurs with mercuric trifluoroacetate in chlorobenzene. With this system, Pd(TTP-HgCl) (3b) and Pt(TTP-HgCl) (3c) along with their bis-, tris-, and tetrakis-mercurated analogs are obtained. The reaction times indicate that replacement of NiII by PdII and PtII progressively diminishes the rate of electrophilic attack at the porphyrin periphery, consistent with a decrease of the total density of negative charge on the porphyrin ligand in these complexes.
Synthese und Thermolyse von α-Titanocenyl-substituierten Dimethylethern: die überraschende Bildung von [(CH3Cp)Ti(OCH3)Cl]4/ Syntheses and Thermolysis of a-Titanocenyl-Substituted Dimethylethers: the Unexpected Formation of [(CH3Cp)Ti(OCH3)Cl]4
Authors: Erker Gerhard , Krüger Carl , Schlund Rüger 
Published: March 2015

Abstract
Reaction of the Grignard-Reagent ClMgCH2OCH , (2) with (RCp)2TiCl2 (5a) (R = H). 5b (R = CH,) yields the titanocene(methoxymethyl)chlorides (RCp)2Ti(Cl)CH2OCH3, 7a and 7b. Thermal decomposition of 7b (2 min, 110 °C in toluene) yields the paramagnetic titanium (III) complex [(CH3Cp)Ti(OCH3)Cl]4 (8) in addition to the organic products ethylene and dimethvlether. The tetranuclear complex 8 crystallizes in space-group P21/n with a = 9.125(2), b = 8.899(1), c = 20.226(2) Å and β - 92.804(9)°. In 8 the Ti4-core is alternatingly doubly-bridged by μ-chloro- and μ-methoxy ligands.
1:1-Salze des organischen Donors Tetra(methylthio)tetrathiafulvalen und Bis(maleonitriIdithiolato)-Komplexen: (TTM-TTF)+[Ni(mnt)2]- und (TTM-TTF)+[ Pt(mnt)2]- / 1:1 Salts of the Organic Donor Tetra(methylthio)tetrathiafulvalene and Bis(maleonitriledithiolate) Complexes: (TTM -TTF)+[Ni(mnt)2]- and (TTM -TTF)+[Pt(mnt)2]-
Authors: Brunn Karl , Endres Helmut , Weiss Johannes 
Published: March 2015

Abstract
(TTM-TTF)+[Ni(mnt)2]- and (TTM-TTF)+ [Pt(mnt)2]- {TTM-TTF = Tetra(methylthio)tetra- thiafulvalene. mnt = maleonitriledithiolate} were obtained as products of the reactions of TTM-TTF with [Et4N][Ni(mnt)2] and [Et4N][Pt(mnt)2]. (TTM-TTF)+ [Ni(mnt)2]- is tridinic. P1, a = 7.650(2), b = 9.671(3). c = 9.846(4) Å. α = 103.47(3)°, β = 101.76(3)°, γ = 91.73(3)°, V = 6913 Å. Z = 1, dc = 1.75 g cm-3. For the isomorphous (TTM-TTF)+[Pt(mnt)2]- a = 7.749(2). b = 9.684(4). c = 9.883(3) Å, α = 103.31(2)°,β = 102.54(2)°, γ = 91.43(3)°, V = 702 Å3 Z= 1, dc = 2.04 g cm-3. The structures consist of mixed stacks of the organic radical cations and of bis(maleonitriledithiolato)metal(III) anions.
Kristallstruktur von Tribromosulfonium(IV)-hexafluoroantimonat(V) SBr3
+SbF6
- [1] / Crystal Structure of Tribromosulfonium(IV)-hexafluoroantimonate(V) SBr3
+SbF6
- [1]
Authors: Minkwitz R. , Lekies R. , Preut H. 
Published: March 2015

Abstract
The crystal structure of SBr3
+SbF6
-is reported. It shows short contacts between the S atom of the cation and F atoms of surrounding SbF6
-anions such that a distorted ψ-octahedral coordination around S is formed. Besides these short S···F-distances, there are short Br···F-contacts in the crystal and nine- and ten-membered heterocycles are formed via S -Br- and Sb-F-bonds and Br···F-contacts.
Von lithiierten Aminofluorsilanen zu mono- und dimeren Iminosilanen / From Lithiated Aminofluorosilanes to Mono- and Dimeric Iminosilanes
Authors: Stalke Dietmar , Keweloh Nayla , Klingebiel Uwe , Noltemeyer Matthias , Sheldrick George M. 
Published: March 2015

Abstract
Depending on the solvent and the bulkiness of the substituents, Iithiated aminofluorosilanes are dimers, monomers, or LiF-adducts of iminosilanes. In the crystal structure of the dimeric lithium derivative of di-tert-butyl(rm-butylamino)fluorosilane, each lithium atom is coordinated by one fluorine and two nitrogen atoms. LiF-elimination leads - if sterically possible - to dimerisation. The limits of dimerisation are reached with the dimer diisopropyl(tri-tert-butylphenyI- imino)silane, for which the crystal structure analysis shows severe steric distortions. Fluorine- chlorine-cxchange occurs in reactions of lithiated (tri-tert-butylphenylimino)fluorosilanes with Me3SiCl. Iminosilanes are obtained by thermal LiCl-elimination from the resulting salts.
Synthese und Kristallstruktur eines Lithium(trimethylacetoxy-di-tert-butylsilanolats) / Synthesis and Crystal Structure of a Lithium(trimethylacetoxy-di-tert-butylsilanolate)
Authors: Dippel Kerstin , Keweloh Nayla K. , Jones Peter G. , Klingebiel Uwe , Schmidt Dieter 
Published: March 2015

Abstract
In an acid medium di-tert-butylsilanediol reacts with acyl chlorides to give the di-tert-butylchlorosilanol (2) and the carboxylic acid. A lithium salt of a silanol-carboxylic acid ester (5) is formed in the reaction of the lithiated diol with 2,2-dimethylpropionyl chloride. 5 reacts with phenylacetyl chloride to give the first mixed dicarboxyl-silane. The crystal structure determination of 5 shows a Li-O-cubane with C = 0 ···Li chelate bonds.
Übergangsmetallkomplexe mit Schwefelliganden, XXXII*: Synthese der sterisch anspruchsvollen Thiolat-amin-Liganden tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethan sowie ihrer Eisen-, Ruthenium- und Zink-Komplexe [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] und [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3/ Transition Metal Complexes with Sulfur Ligands, XXXII*: Synthesis of the Sterically Demanding New Thiolate-amine Ligands tbu2-ma-H = 2-Mercapto-3,5-di-tbutylanilin und tbu4-bmae-H2 = 1,2-Bis(2-mercapto-3,5-di-tbutylaniIino)ethane as well as of their Iron-, Ruthenium- and Zinc Complexes [Fe(CO)2(tbu2-ma)2], [Zn(tbu2-ma)2] and [RuL2(tbu4-bmae)], L = CO, PMe3, PPh3
Authors: Sellmann Dieter , Käppler Olaf 
Published: March 2015

Abstract
In order to obtain soluble complexes containing sterically protected metal centers the new bi- and tetradentate thiolate amine ligands 2-mercapto-3,5-di-tbutylaniline (= tbu2-ma-H) and 1,2-bis(2-mercapto-3,5-di-tbutylanilino)ethane (= tbu4-mae-H2) were synthesized. tbu2-ma-H reacts with FeCl2-4 H2O and CO to give [Fe(CO)2(tbu2-ma)2], with Zn(ac)2 -2 H2O [Zn(tbu2-ma)2] is obtained whose acid hydrolysis and reaction with H2S, respectively, yield pure tbu2-Ina-H. The condensation of tbu2-ma-H with glyoxal yields the respective bis-benzthiazolidine, which is re­duced by LiAlH4 in the presence of Na[N(SiMe3)2] to tbu4-bmae-H2. tbu4-bmae-Li2. reacts with [Ru(CO)3(THF)Cl2], [Ru(PMe3)4Cl2] and [Ru(PPh3)2(CH3CN)2Cl2], respectively, to yield [Ru(L)2(Tm4-bmae)j (L = CO, PMe3, PPh3). The complexes are more soluble in organic solvents than the corresponding unsubstituted bmae complexes, bmae2- = 1,2-bis(2-mercaptoanilino)- ethane(2-).
The Temperature-Variable Geometry of the Pseudo-Octahedral CuO6 Entity in Bis(methoxyacetato) diaquo-Cooper(II) - a Single Crystal EPR Study
Authors: Jakob Bernd , Reinen Dirk 
Published: March 2015

Abstract
The Cu-O bond lengths in the pseudooctahedral bis(methoxvacetato)diaquo-copper(II) com­plex are determined by the Jahn-Teller effect on the one hand and by the bonding properties of the three different oxygen ligator atoms (from a carboxylate. water and ether group) on the other. It is derived from EPR single crystal and powder investigations between 4.2 and 350 K. that the system becomes fluxional above =120 K due to a continuous transition from a static to a (par­tially) dynamic Jahn-Teller distortion. A model is presented, which allows to correlate the EPR results with the Cu-O spacings. if they are calibrated with structural data at two different temperatures. The structure of the ground state potential surface of Cu2+ is derived from the spectroscopic data.
Pentamethylcyclopentadienyl-Vanadium Complexes Containing Halogeno- and Oxo-Ligands
Authors: Herberhold Max , Kremnitz Walter , Kuhnlein Markus , Ziegler Manfred L. , Brunn Karl 
Published: March 2015

Abstract
A simple and high-yield preparation of the pentamethylcyclopentadienyl vanadium(IV) trihalides Cp*VX3 (X = CL, Br, I) from Cp*V(CO)4 as well as their conversion into the oxo-vanadium(V) compounds Cp*VOX2 (X = CL, Br) and [Cp*VOX]2(μ-O) (X = CL, Br, I) are described. The equilibrium between the two fluoride species Cp*VOF2 and [Cp*VOF]2(μ-O) has also been investigated. The complexes are characterized by their NMR (51V, l3C, 1H), IR, and mass spectra. The crystal structure of the binuclear chloro-oxo complex [Cp*VOCl]2(μ-O) has been determined by X-ray diffraction. The molecules contain two [Cp*VOCl] units combined via a bent oxo bridge (V-O-V angle of 142.2(2)°). The vanadium-oxygen bond lengths are 157.6(8) and 179.4(1) pm for the terminal and the bridging oxo ligands, respectively, corresponding to double and single bonds.
Synthese und spektroskopische Charakterisierung mehrfach silylierter Ethene / Synthesis and Spectroscopic Characterization of Di- and Trisilylethenes
Authors: Schmidbaur H. , Ebenhöch J. 
Published: March 2015

Abstract
Di- and trisilylethenes have been prepared by catalytic hydrosilylation of trimethylsilyl-, bis-(trimethylsilyl)- and bis(trichlorosilyl)ethyne and converted into the hydrogenated derivatives by LiAlH4-reduction. The stereochemistry of the products and the effects of substitution of methyl vs. chlorine ligands on the NMR coupling constants J(29Si/1H) have been investigated by analysis of selectively (Me)-decoupled 29Si NMR spectra. From the results it has been concluded, that the catalytic hydrosilylation of silylated ethynes proceeds in a stereospecific syn fashion yielding trans adducts. Substitution of methyl by chlorine at one or two Si-atoms in tris(trimethylsilyl)ethene leads to an increase of the coupling constant J(29Si/1H vinyl) with the chlorinated Si-atoms and reduces the values for those Si-atoms, where the methyl groups are retained.
Monomerie Metaphosphate: Does it Exist in Aqueous Solution?
Authors: Keesee R. G. , Castleman A. W. 
Published: March 2015

Abstract
Enthalpy changes for the successive addition of the first four water molecules onto monomeric metaphosphate anion in the gas phase have been determined to be -12.6, -11.4, -16.3, and - 11.0 kcal/mol, respectively. The results suggest that the first addition is a simple formation of the adduct PO3
- · H2O as apposed to formation of the dihydrogen orthophosphate anion (HO)2PO2
-, but that the third addition involves a transformation to the orthophosphate anion.
N-TrimethylsilyMminotriphenylphosphoran-Kupfer(II)-chlorid, [Me3 SiNPPh3 · CuCl 2 ]2 Synthese und Kristallstruktur / N-Trimethylsilyl-iminotriphenylphosphorane Copper(II) Chloride, [Me3 SiNPPh3 · CuCl 2] 2 Synthesis and Crystal Structure
Authors: Fenske Dieter , Böhm Eberhard , Dehnicke Kurt , Strähle Joachim 
Published: March 2015

Abstract
The title compound has been prepared by the reaction of N-trimethylsilyl-iminotriphenylphos-phorane with copper(II) chloride in boiling CCl4 /C2H5OH, and forms moisture sensitive crystals, which are green in transmittance and black in reflexion. [Me3SiNPPh3 · CuCl2 ] 2 was characterized by its IR spectrum as well as by a crystal structure determination (4197 observed, independent reflexions, R = 0.049). The lattice dimensions are at 20 °C: a = 1102.7. b = 1407.3. c = 1560.2 pm; β = 94.27°; space group P21/n with two formula units in the unit cell. The complex consists of centrosymmetric, dimeric molecules with a planar Cu2 Cl2 ring (Cu-CI bond lengths 229 and 231 pm). A terminally bonded CI atom (Cu-CI = 221 pm) and the N atom of the Me3SiNPPh3 ligand (Cu-N = 198.5 pm) complete the coordination number four of the nearly planar surroundings of the Cu atoms.
Darstellung und Kristallstruktur des Bis(triethylammonium)octasulfids, [HN(C2 H5)3]2 S8 / Preparation and Crystal Structure of the Bis(triethylammonium)octasulfide, [HN(C2 H5) 3]2S8
Authors: Schliephake A. , Falius H. , Buchkremer-Hermanns H. , Böttcher P. 
Published: March 2015

Abstract
The preparation and crystal structure of the first octasulfide is described. The reaction of triethylamine, sulfur and dihydrogen sulfide in a solution of formamide yields orange-red crystals of bis(triethylammonium)octasulfide. The crystals are orthorhombic, space group Pbcn. with 4 molecules per unit cell. The cell constants are a = 23.709(4) Å. b = 13.276(4) Å. c = 7.388(2) Å. The chains of sulfur, S8
2-, do not show the common helical all-trans conformation, but a mixed sequence with the signs of the dihedral angles (++−++ and −−+−−).
Lithium-dimethylamino-hydrido-aluminate: Lösungszustand in Diethylether, Tetrahydrofuran und Dimethyldiglykolether / Lithium Dimethylamino Hydrido Aluminates: The Solution State in Diethylether, Tetrahydrofuran and Dimethyldiglycol Ether
Authors: Böck St. , Nöth H. 
Published: March 2015

Abstract
The reaction of LiAlH4 with dimethylamine has been studied in THF, diglyme and diethyl ether solution covering the molar ratios 1:0.5 to 1:4. In all cases the stoichiometric amount of H2 s evolved. With the exception of LiAl[N(CH3)2]4 all other members of the series LiAlH4-n[N(CH3)2]n cannot be isolated. They are in equilibrium with one another in solution, these equilibria are independent of the solvent used.
The structure of compound LiAl[N(CH3)2]4 · 2(OC4H8) has been determined by X-ray diffraction. The anion acts as a bidentate ligand to Li which is also bonded to the oxygen atoms of two THF molecules.
Neue Iminoborane und ihre Reaktionen / Novel Iminoboranes and their Reactions
Authors: Bonn Karl-Heinz van , Bennigsen-Mackiewicz Theo von , Kiesgen Jutta , Plotho Christoph von , Paetzold Peter 
Published: March 2015

Abstract
The iminoboranes RB≡NR′, 2a-f, are formed by the elimination of Me3SiHal from the corresponding aminoboranes 1a-f. Stabilization occurs either through cyclodimerisation (→3b-d,f), cyclotrimerisation (→4e), bicyclotrimerisation (→5b) or cyclotetramerisation (→6a). Trialkylboranes BX3 are added to give the diboryl amines

. 7a-f. The Δ2:-tetraazaborolines

. 8a-f, are the (3+2)-cycloaddition products from 2a-f and azides X′N3. A CH-bond of cyclopentadiene adds to one of the BN bonds of 2f, giving a mixture of the corresponding 1,3- and 1,4-cyclopentadienyl boranes. 9f, 9′f.
Eine Zintl-Phase mit isolierten SnSb4
8-Anionen: Na8SnSb4 / A Zintl Phase with Isolated SnSb4
8- -Anions, Na8SnSb4
Authors: Eisenmann Brigitte , Klein Jürgen 
Published: March 2015

Abstract
The new compound Na8SnSb4 has been prepared from appropriate mixtures of the elements at 700 °C in evacuated silica ampoules coated with glassy carbon. The structure has been determined by single crystal X-ray diffraction data (cubic, space group Fd3m, a - 1481.6(3) pm, Z = 8, R = 0.044 for 263 reflections). There are isolated tetrahedral SnSb4
8- units (bond length Sn -Sb = 284.3 pm), proving the compound to belong to the Zintl phases.