bluuebunny/crossref_metadata_2025_split huggingface dataset:
Photoionisationsmassenspektren von MethyI(trifluormethyl)sulfan CH3SCF3 [1]/Photoionization Mass Spectra of Methyl(trifluoromethyl)sulfan CH3SCF3 [1]
Authors: Hagenow G. , Jochims H.-W. , Sawatzki J. , Minkwitz R. , Baumgärtel H. 
Published: March 2015

Abstract
The ionization potential of CH3SCF3 and the appearance potentials of fragment ions have been measured in the photon energy range 9 -19 eV using synchrotron, radiation. From these results thermochemical data of CH3SCF3, CH3SCF3
+ and fragment ions have been evaluated.
Dithiocarbimates from Sulfonamides, Part 1: Preparation and X-Ray Crystal Structures of K2[S2C = N—SO2—C6H5] · 2H2O and K2[S2C = N—SO2—C6H4—Cl] · 2H2O
Authors: Hummel Hans-Ulrich , Korn Uwe 
Published: March 2015

Abstract
Dithiocarbimates. Sulfonamides, X-Ray. Sulfones By reaction of the sulfonamides C6H5-SO2-NH2 and p-Cl-C6H4-SO2-NH2 with CS2 in the presence of bases the corresponding dithiocarbimates have been obtained in form of their potassium salts and characterized by means of X-ray structural analysis. Both compounds crystallize in the space group P21/a with a = 29.778(3), b - 6.202(1). c = 7.169(1) Å and β = 90.33(2)° for K2[S2C = N-SO2-C6H5] · 2H2O and a = 31.517(3). b = 7.189(1), c -6.196(1) Å and β = 90.10(1)° for the Cl-substituted species, respectively. A relation between both crystal structures becomes obvious when for K2[S2C = N-SO2-C6H4-Cl] · 2H2O the first space group setting is choosen; i.e. P 1 1 21/a. The dithiocarbimates are built up of two planar moieties. One plane contains the S2C = N-SO framework of each anion while a second plane consists of the S-C6H5 group and the S-C6H4-Cl group, respectively. The two planes are oriented nearly perpendicular to each other and give rise to conjugation involving the SO2 groups in the different systems.
Synthesis of Water Soluble Tetrairidium Clusters Suitable for Heavy Atom Labelling of Proteins
Authors: Jahn Werner 
Published: March 2015

Abstract
The substitution of 4 CO ligands in Ir4(CO)12 by tris-(2-carbethoxyethyl)phosphine and sub­ sequent reaction with ammonia yielded water soluble Ir clusters which when modified further can be used for heavy atom labelling of proteins.
Heteronukleare Mehrkernkomplexe. Darstellung und Struktur von Komplexen mit den Kationen [MII{(OH)2CoIII(en)2}3]5+, M = Ni, Zn, Mg/Polynuclear Mixed-Metal Complexes. Preparation and Structures of Complexes with the Cations [MII{(OH)2CoIII(en)2}3]5+, M = Ni, Zn, Mg
Authors: Müller Susanne , Thewalt Ulf 
Published: March 2015

Abstract
Reaction of [(en)2Co(H2O)2](ClO4)3 with the dichlorides of nickel, magnesium , and zinc, leads at an pH of ca. 8 to the heterometallic, isomorphous complexes [MII{(OH)2CoIII(en)2}3](ClO4)4Cl·3H2O. The central metal(2 +) cations of these complexes are surrounded octahedraily by three [(en)2Co(OH)2]+ chelate ligands. This has been confirmed by X-ray structure analyses. The cation antipodes of the racemic salts exhibit the conformations Δ (⋀ ⋀ ⋀) / ⋀ (Δ Δ Δ) .
Darstellung und Kristallstruktur von NdSe1,9/ Preparation and Crystal Structure of NdSe1,9
Authors: Urland W. , Plambeck-Fischer P. , Grupe M. 
Published: March 2015

Abstract
NdSe1,9 has been prepared as grey, strongly reflecting platelets by reaction of elemental neodymium with selenium in the ratio 1 :2 and subsequent chemical vapour phase transport with iodine. It crystallizes in the tetragonal space group P42/n with a = 925.36(7), c = 1679.2(3) pm and Z = 20. The structure determination results in a formulation of NdSe1,9 as Nd 20(Se(I)2)8Se(I)2⃞2Se(II)20, where the defect layer built from the Se(I)2
2- and Se(I)2- ions corresponds to the F layer in the PbFCl substructure.
Reaktion des Oxovanadium(V)-trichlorids mit tert-Butylamin und silylierten Derivaten/Reaction of Oxovanadium (V) Trichloride with tert-Butylamine and Silylated Derivatives
Authors: Preuss Fritz , Fuchslocher Edith , Leber Edith , Towae Willi 
Published: March 2015

Abstract
A m ino and Im inovanadium (V) C om pounds, Preparation, 5IV NM R Spectra The reaction o f V O C l3 with rm -butylam ine and silylated derivatives has been studied. 0 = V C 1 2[N'C4H 9(R)] (R = SiM e3, SiM e2NH'C4H 9), 0 = V (0 S i M e 3)2Cl and binuclear vanadium (V) com plexes with bridging oxo and nitrogen ligands have been prepared; their spec­ troscopic data ('H N M R ,51V N M R , IR) are reported. A simple route for preparing'C4H 9N =V C 13 and ['C4H 9N = V (0)C 1]" is described including com plex formation with pyridine and chloride ions.
Zur direkten Synthese von Organobromgermanen aus Methylenbromid und Germanium/Kupfer-Gemischen/Direct Synthesis of Organobromogermanes from Methylenebromide and Germanium/Copper Mixtures
Authors: Schmidbaur Hubert , Rott Johann 
Published: March 2015

Abstract
A lkylbrom ogerm anes, Synthesis, C V D Feeding G as, G erm anium /Copper Mixtures From the copper-catalyzed reaction o f germanium powder with dibrom om ethane at 310 °C a mixture o f alkylbrom ogermanes is obtained. The major products are CH 3G eB r3, Br3G eC H 2Br
Synthesen und Kristallstrukturen der Kronenether-Komplexe [Li3(12-Krone-4)3O2CCH3] [Cd(Se4)2], {[K(18-Krone-6)]2[Hg(Se4)2]}2 und [Na(15-Krone-5)]NO3 / Syntheses and Crystal Structures of the Crown Ether Complexes [Li3(12-Crown-4)3
3O2CCH3][Cd(Se4)2], {[K(18-Crown-6)]2[Hg(Se4)2]}2, and [Na(15-Crown-5)]NO3
Authors: Kräuter Gertrud , Weller Frank , Dehnicke Kurt 
Published: March 2015

[Li3(12-crown-4)3O2CCH3][Cd(Se4)2] has been prepared by the reaction of [Li(12-crown-4)]2Se6 with Cd(C2CCH3)2 in ethanolic solution. The corresponding polyselenide complex of mercury is formed by the reaction of [K(18-crown-6)]2Se6 with Hg(O2CCH3)2 in the same solvent. Both com pounds form dark red crystals, which were characterized by single crystal X-ray structure determinations. The only product to be isolated from the reaction of Bi(NO3)3·5H2O with [Na( 15-crown-5)]2Se6 in ethanolic solution was [Na(15-crown-5)]NO3, whose structure has also been determined. [Li3(12-crown-4)3O2CCH3][Cd(Se4)2]: space group Pbca, Z = 8. 1404 observed independent reflexions. R = 0.097. Lattice dimensions (19 °C): a = 1981.5(6). b = 1400.3( 1), c = 3268.9(9) pm. The compound forms a dicationic ensemble, in which three lithium ions coordinate with the oxygen atoms of the acetate ion. In the anions the cadmium atom is coordinated tetrahedrally by four selenium atoms of two Se4
2- units.
{[K (18-crown-6)]2[Hg(Se4)2]}2: space group P 1, Z = 1. 3210 observed independent reflexions, r = 0.055. Lattice dimensions (19 °C): a = 1057.4(2). b = 1130.6(2), c = 2000.1(2) pm. α = 88.52(1)°, β = 85.86(1)°, γ = 66.22(1)°. The com pound has a complex ionic structure, in which the formula units form centrosymmetric dimers through K-O contacts between two cations. In addition there are K···Se contacts with the spiro-bicyclic anions, which - together with 6 K-O bonds within the crowns - lead to the coordination number of 8 for the remaining potassium ions.
[Na(15-crown-5)]NO3: space group P212121, Z = 4. 1211 observed independent reflexions. R = 0.052. Lattice dimensions (20 °C): a = 912.9(2). b = 989.6(1). c = 1658.3(3) pm. The compound forms ion pairs, in which the sodium atom coordinates with the five oxygen atoms oi the crown ether, as well as with two oxygen atoms of the nitrate ion with Na -O bond lengths of 240 and 247 pm.
Synthese und Kristallstruktur des cyclischen Hydrazido-Komplexes {Fe2Cl4[(NSiMe3)(CPh)]2N2} / Synthesis and Crystal Structure of the Cyclic Hydrazido Complex {Fe2Cl4[(NSiMe3)(CPh)]2N2}
Authors: Hiller Wolfgang , Hartmann Eva , Dehnicke Kurt 
Published: March 2015

The title compound has been prepared by the reaction of FeCl3 with N, N, N′-tris(trimethylsilyl) benzamidine in CH2Cl2 solution as dark red, moisture-sensitive crystals. The complex was characterized by its IR spectrum as well as by an X-ray structure determination.
Crystal data: space group P21/n, Z = 2 (1178 observed independent reflexions, R = 0.089). Lattice dimensions (20 °C): a = 1240.2(2), b = 645.7(3), c = 1779.7(3) pm, β = 91.31(2)°. The compound forms centrosymmetric molecules, in which the iron atoms are members of two fused planar

heterocycles with the NN group as the com m on edge. The NN bond length (142.5(9) pm) is very close to the NN bond length of hydrazine.
Die Kristallstruktur von Ga3Cl7/ Crystal Structure of Ga3Cl7
Authors: Frank Walter , Hönle Wolfgang , Simon Arndt 
Published: March 2015

Abstract
Trigallium heptachloride, G a3Cl7, has been prepared from GaCl3 and Ga in sealed glass ampoules. Ga3Cl7 crystallizes in the space group Pna21 (No. 33) with a = 1181.8(1) pm; b = 889.7(1) pm; c = 1057.5(1) pm; Z = 4. The compound is isotypic with KGa2Cl7
-. The Ga2Cl7
- anion has nearly C2 symmetry (gauche conformation) with d̄ (Ga -Clbridg) = 230.3 pm, d̄ (Ga -Clterm) = 214.3 pm and and ∢ Ga -Cl -Ga = 109.0°. The Ga+ ion is coordinated by ten Cl atoms (4 + 6) with d = 346.2 pm. The coordination of Ga+ and the conformation of Ga2Cl7
- are discussed in detail together with related compounds.
Di-cyano-″propyl-arsan als Edukt für den Aufbau mehrkerniger arsanverbrückter Cobalt-Cluster/Di-cyano-″propyl-arsine as Educt for the Formation of Multinuclear Arsino-Bridged Cobalt Clusters
Authors: Lang Heinrich , Lay Uwe , Zsolnai Laszlo 
Published: March 2015

Abstract
(nC3H7)As(CN)2 (1) reacts with CO2(CO)8 (2) to yield the cluster 3 in which two (nC3H7)As fragments are coordinated to Co(CO)n (n = 1, 2, 3) groups. The cluster 3 has been characterized
by analytical and spectroscopic data and by an X -ray analysis.
Ammonium Hexavanadate, (NH4)2V6O16: Preparation, Crystal Structure, Infrared Spectra and High-Pressure Reactions
Authors: Range Klaus-Jürgen , Eglmeier Christiane , Waal Danita de , Heyns Anton M. 
Published: March 2015

Abstract
Following a re-examination of several published methods for the preparation of ammonium
hexavanadate, single crystals of (NH4)2V6O16 have been grown by a reaction of V2O5 with
NH4Cl in hot aqueous solution. They are monoclinic, space group P 21/m , with a = 7.858(2),
b = 8.412(2), c = 4.995(1) Å , β = 96.43(2)°, and Z = 1. The structure was refined to R = 0.060,
wR = 0.039 for 745 unique reflections. It comprises layers built of V2O8 double square pyramids
( V - O = 1.595- 1.988 Å) and distorted VO6 octahedra ( V - O = 1.589-2.287 Å). The infrared
bands of the NH4
+- and ND4
+- groups in (NH4)2V6O16 and its deuterated analogue can be
assigned with a fair amount of certainty at 90 K under the space group P 21/m (C2h
2). The N - D
stretching modes of isotopically diluted NH3D+-groups in (NH4)2V6O16 are in agreement with
the predicted splitting into Cs, Cs and C1(2) components. The frequencies and shapes of these
modes seem to suggest that bifurcated hydrogen bonds are formed, closely resembling the corresponding
bonds in NH4VO3. The NH4
+ ions are dynamic in character in (NH4)2V6O16 and
remain so down to temperatures of 90 K. At high temperatures in a closed high-pressure system
a redox reaction between vanadium (V ) and ammonia takes place which yields VO2 as
main product. Intermediates have been found, but up to now their com position is still unknown.
Reaktionen von Re2O7 mit Iminophosphoranen - Kristallstruktur von ( O3ReN = PPh2)2C2H4/Reactions of Re2O7 with Iminophosphoranes - Crystal Structure of (O3ReN = PPh2)2C2H4
Authors: Roesky Herbert W. , Hesse Detlev , Rietzel Mathias , Noltemeyer Mathias 
Published: March 2015

Abstract
Re2O7 reacts with (Me3SiN = PPh2)2CH2, (Me3SiN = PPh2)2C2H4 and Me3SiN = PPh3 to give (O3ReN = PPh2)2CH2 (3), (O3ReN = PPh2)2C2H4 (6) and Ph3P= NReO3 (7). 6 has been characterized
by X-ray crystallography. The complex crystallizes in the space group P 1̄ with unit cell dimensions a = 837.4(4), b = 873.0(5), c = 1102.5(6) pm, ɑ = 112.53(4), β = 98.54(4), γ = 100.59(4)°, and Z = 1. The structure demonstrates that the bis(diphenylphosphinimino)-ethane group is bridging two ReO3 units.
[2+3]-Cycloadditionsreaktionen von Nitrilen mit Bis(triphenylphosphoranyliden)iminiumazid/[2 + 3]Cyclo-Addition Reactions of Nitriles with Bis(triphenylphosphoranyliden)iminium Azide
Authors: Sundermeyer Jörg , Roesky Herbert W. , Noltemeyer Mathias 
Published: March 2015

Abstract
Cyanogen and the two isomers of S(CN)4 ((2) and (3)) react with [Ph3PNPPh3]+N3
-

(Ph3PNPPh3 equals PPN) or [Me4N]+N3
- to yield the tetrazolides [PPN]+[C2N5]- (4), [PPN]+[C4N7S]- (5), isomer (6) and [Me4N]+[C4N7S]- (7), respectively. The X-ray structure of (7) is reported. The [C4N7S]- anion is completely planar. It consists of two five-membered rings. Pyrolysis of (7) in an FD mass spectrometer gives anions of composition [C4N5]- and [C6N5]- .
Darstellung und Charakterisierung eines Technetium-Butadien-Komplexes; Röntgenstrukturanalyse von [Tc2(CO)8][μ-C4H6]
Authors: Kanellakopulos Basil , Nuber Bernhard , Raptis Konstantinos , Ziegler Manfred L. 
Published: March 2015

(4).
Tc2(CO)10 has been photolyzed in the presence o f butadiene at - 20 °C in pentane. Under these conditions the only product which could be characterized is the complex [Tc2(CO)8][μ-C4H6] The X -ray structure determination shows that 1 is isomorphous with the homologues species [M2(CO)8][μ-C4H6] (M = Mn, Re) with the trans-butadiene ligand bridging the two technetium centers. 4 is compared to the manganese (5) and rhenium species (6 ).
Einfluß der Dotierung von BaPb0,75Bi0,25O3 mit K, Rb und Cs auf dessen supraleitende Eigenschaften
Authors: Jansen M. , Bredthauer J. 
Published: March 2015

x
In the series with nominal stoichiometry Ba1-xAxPb0,75Bi0,25O3 (A = K, Rb with = 0.1, 0.2, 0.3, and A = Cs with x = 0.1) solid solutions were prepared. The composition of the samples obtained was verified by X -ray techniques. All compounds crystallize tetragonally with a 3-dimensional array of Pb(Bi) - O6 octahedra and Pb(Bi) -O -Pb(Bi) bonding angles of 180° (c-axis) and 165° (xK = 0.3) 168° (xRb = 0.3 and xCs = 0.1) within the a/b plane. Superconducting transition temperatures o f Ba1-xAxPb0,75Bi0,25O3 with Te = 12 (“onset”) were determined using a SQUID magnetometer.
Synthesis of Amino Acids Analogues of Citric Acid Siderophores
Authors: Milewska Maria J. , Chimiak Andrzej , Neilands John B. 
Published: March 2015

2-tert-buiyl-
Three amino acid analogues of citric acid siderophores were synthesized. The synthetic strategy involved condensation of 2-tert-butyl-1,3-di(N-hydroxysuccinimidyl) or 1,3-bis(pentachlorophenyl)citrates with N-ethyl-ω-aminoalkylhydroxamates. The examination of biological properties of the obtained compounds revealed their poor, if any siderophore activity and thus confirmed the structural requirements previously suggested for siderophores of this type.
Säure-induzierte CC-Kupplung von Isocyanid-Liganden in homoleptischen Alkylisocyanid-Komplexen von Mo(0) und W(0) / Acid-Induced CC-Coupling of Isocyanide Ligands in Homoleptic Alkylisocyanide Complexes of Mo(0) and W(0)
Authors: Filippou Alexander Constantin , Grünleitner Walter 
Published: March 2015

Reactions of the electron-rich, homoleptic alkylisocyanide complexes M(R N C)6 (1a-2b) (1: M = Mo, 2: M = W; a: R = Et, b: R = tBu) with electrophiles have been studied. A coupling of two isocyanide ligands to a complexed alkyne ligand is observed, when M(R N C)6 is treated with two equivalents of HX(X = Br, I) and leads to the bis(alkylamino)acetylene complexes [X (R N C )4M[η2-R(H)NC ≡ CN(H)R]]X (3a′-4b″) (3: M = Mo, 4: M = W). Treatment of W (EtNC)6 (2a) and W (tBuNC)6 (2b) with one equivalent of Me3SiOTf results in the quantitative formation of the aminocarbyne complexes [(EtNC)5W ≡ CN (SiMe3)Et]OTf (6c) and [(tBuNC)5W ≡ C N (SiMe3)tBu]OTf (6d), respectively. In comparison, an equilibrium between W(tBuNC)6 (2b) and the aminocarbyne complex [(tBuNC)5W ≡ C N (SiMe3)tBu]Cl (6e) is found, when 2b is treated with Me3SiCl. The compounds 6c and 6d are structurally related to the aminocarbyne complexes [(EtNC)5M ≡ C N E t2]BF4 (5a: M = Mo, 6a: M = W) and [(tBuNC)5W ≡ C N (Et)
Bu]BF4 (6b), which are obtained from ethylation of M (EtNC)6 (1a, 2a) and W (tBuNC)6 (2b) with Et3OBF4. 5a and 6a undergo with HI a carbyne-isocyanide coupling reaction to give the alkyne complexes [I(EtNC)4Mo[η2-Et2NC≡CN(H)Et]]BF4 (7a) and [I(EtNC)4W[η2-Et2NC≡CN(H)Et]]BF4 (8a), respectively. Similar reactivity is exhibited by 6b, which yields with HI the alkyne complex [I(tBuNC)4W[η2-tBu(Et)N C ≡ C N (H)tBu]]BF4 (8b). The reported transformation of a complexed isocyanide to an aminocarbyne and the acid-induced aminocarbyne-isocyanide coupling reaction are experimentally verified to be important steps in the reductive coupling of isocyanide ligands in [M(RNC)6X]+-complexes yielding the bis(alkylamino)acetylene compounds [X(R N C)4M[η2-R (H )N C ≡ C N (H )R ]]+.
Alternativ-Liganden XXVIII. Neue Komplexe M(CO)4L mit Dipodliganden des Typs R2M′(OCH2PMe2)x(CH2CH2PMe2)2-x(M = Cr, Mo, W; M′ = Si, Ge; R = Me, Ph; x = 0 - 2 ) / Alternative Ligands XXVIII. Novel Complexes M(CO)4L with Dipod Ligands of the Type R2M'(OCH2PMe2)x(CH2CH2PMe2)2-x(M = Cr, Mo, W; M' = Si, Ge; R = Me, Ph; x = 0 -2)
Authors: Grobe Joseph , Krummen Anita , Krebs Bernt , Läge Mechtild 
Published: March 2015

Abstract
The coordinating properties of dipod ligands of the type R2M′(OCH2PMe2)x(CH2CH2PMe2)2-x(R = Me, Ph; M' = Si, Ge; x = 0 -2) have been investigated by the preparation of the novel cis-M (CO)4L complexes (M = Cr, Mo, W). They are obtained under mild conditions in cyclohexane or n-hexane solution by the reaction of the norbornadiene precursors M(CO)4NBD with the corresponding ligands. In case of the Ge containing ligands the dilution principle was used to improve the yields of the mononuclear derivatives. The rate of the NBD replacement is mainly determined by the central atom M (Mo > W > Cr) and only little by R, M' or x . The new com pounds have been characterized by analytical (C, H) and spectroscopic investigations (1H, 31P NMR, IR, MS). The ligand properties are discussed on the basis of spectroscopic data (in particular coordination effects) and the molecular structure of the complexes Cr(CO)4[Ph2Si(OCH2PMe2)2] (12) and Mo(CO)4Me2Ge(CH2CH2PMe2)2] (28) obtained by X-ray diffraction studies.
Die Schmelzdiagramme für die Systeme aus (CH3)3SiBr und den sechs Lutidinen / The Phase Diagrams of the Systems of (CH3)3SiBr and the Six Lutidines
Authors: Hensen Karl , Wagner Peter 
Published: March 2015

Abstract
The phase diagrams of the systems of trimethylbromosilane and the isomeric lutidines are shown. The existence of the congruently melting addition compounds (CH3)3SiBr ∙ (3,4-lutidine), (CH3)3SiBr (3,5-lutidine) and the incongruently melting addition compounds (CH3)3SiBr • (2,3-lutidine)2, (CH3)3SiBr • (2,3-lutidine), (CH3)3SiBr (2,4-lutidine), ((CH3)3SiBr)2 • (2,4-lutidine), (CH3)3SiBr • (2,5-lutidine)2, (CH3)3SiBr • (2,5-lutidine), (CH3)3SiBr (2,6-lutidine)2 could be proved.
Sc5Re2C7, a Complex Carbide with C3-Units
Authors: Pöttgen Rainer , Jeitschko Wolfgang 
Published: March 2015

Abstract
The title compound was obtained by arc melting of the elemental components and subsequent annealing in a high frequency furnace. It crystallizes with the orthorhombic space group Cmmm, a = 779.26(7) pm, b = 1362.0(1) pm, c = 320.62(3) pm, V = 0.3403 nm3, Z = 2. The structure was determined from single-crystal X-ray data and refined to a residual of R = 0.021 (692 F values and 21 variables). It is closely related to the NaCl-structure. Three of the seven carbon atoms per formula unit form linear C3 -units with C-C bond lengths of 134 pm. They are coordinated to ten Sc atoms forming bicapped quadratic prisms. Additional isolated C atoms are located in octahedral voids formed by four Sc and two Re atoms. Together with the Re atoms they form two-dimensionally infinite [Re2C4
11-]n polyanions. The Re atoms have highly distorted tetrahedral carbon coordination with Re -C bond lengths of 200 and 208 pm corresponding to bond orders of about two. This coordination seems to be compatible with the 18-electron rule. The near-neighbour coordination of the Re atoms is assymmetric. It is suggested that this is due to the space requirements of nonbonding electrons. Samples of Sc5Re2C7 are semiconducting and weakly paramagnetic.
K2Sn4Se8 -ein gemischtvalentes Selenostannat / K2Sn4Se8 -A Mixed-Valent Selenostannate
Authors: Klepp K. O. , Fabian F. 
Published: March 2015

Abstract
Transparent, ruby red crystals of the new compound K2Sn4Se8 were obtained from K2Se, Sn and Se by high temperature synthesis. K2Sn4Se8 is monoclinic, space-group Cm with a = 6.436(3) Å, b = 18.934(9) Å, c = 7.417(5) Å, β = 96.26(2)°; Z = 2. The crystal structure was refined to a conventional R of 0.022 (Rw = 0.018).
In K2Sn4Se8 the tin atoms have two distinct oxidation states +2 and +4. Sn(IV) is tetrahedrally coordinated by Se, Sn(II) has a pseudo-trigonal bipyramidal coordination MA4E which reveals a pronounced stereo-activity of the lone pair of electrons.
In the crystal structure the Sn(IV)Se4-tetrahedra share common apices, yielding open sheets which are separated from each other by the alkali cations, but connected via the Sn(II) centers.
Na4SnSe4 und K4SnSe4, zwei neue Selenostannate mit isolierten Anionen / Na4SnSe4 and K4SnSe4, Two New Selenostannates with Discrete Anions
Authors: Klepp Kurt O. 
Published: March 2015

Abstract
Transparent yellow single crystals of Na4SnSe4 and K4SnSe4 were prepared by reacting stoichiometric powdered mixtures of the binary compounds Na2Se or K2Se, Sn and Se at 850 K. Na4SnSe4 is tetragonal, s.g. P4̄21c, with a = 8.165(2) Å, c = 7.268(2) Å, Z = 2. K4SnSe4 is orthorhombic, s.g. Pnma, with a = 14.714(7) Å, b = 10.323(3) Å, c = 8.248(6) Å, Z = 4. The crystal structures were refined to conventional residuals of 0.058 and 0.031, respectively. Both com pounds are characterized as salts with discrete tetrahedral selenostannate anions. Na4SnSe4 is isostructural with Na4SnS4, K4SnSe4 is of a new type. The observed Sn -Se bond lengths range from 2.494 Å to 2.536 Å.
Headspace Constituents of Vetiver Oil
Authors: Nikiforov Alexej , Buchbauer G. , Jirovetz L. , Remberg B. , Remberg G. 
Published: March 2015

Abstrac
t By headspace analysis of the essential oil of Vetiver hitherto sixteen not described volatile constituents, mainly monoterpenes, could be identified. For these investigations GC -FID , GC-MS, GC-FTIR and the GC-sniffing-technique were used.
Synthesen und Kristallstrukturen der Lithiumphosphide {Li(DME)[P(t-Bu)2]}2 und [Li(DME)PPh2]∞ / Syntheses and Crystal Structures of the Lithium Phosphides {Li(DME)[P(t-Bu)2]}2 and [Li(DME)PPh2]∞
Authors: Stieglitz Gudrun , Neumüller Bernhard , Dehnicke Kurt 
Published: March 2015

Abstract
The title compounds have been prepared by the reaction of n-butyllithium with the corresponding diorganophosphanes HPR2 (R = t-Bu, Ph) in DME solutions. Both compounds were characterized by crystal structure determinations.
{Li(DME)[P(t-Bu)2]}2: Space group P 1̄, Z = 1, 2027 observed unique reflections, R = 0.055. Lattice dimensions at -80 °C: a = 879.9(3), b = 986.3(1), c = 1064.0(2) pm, α = 70.69(1)°, β = 70.63(2)°, γ - 69.89(2)°. The compound forms centrosymmetric dimers of symmetry Ci with Li-P bond lengths of 260.0 and 257.3 pm for the Li2P2 four-membered ring.
[Li(DME)PPh2]∞: Space group P21/n, Z = 4. 3437 observed unique reflections, R = 0.055. Lattice dimensions at - 80 °C: a = 1034.8(2), b = 812.48(9), c = 1978.4(3) pm, β = 103.30(2)°. The compound forms polymeric chains via LiP bridges with Li-P bond lengths o f 256.3 and 254.1 pm.
On the Hydrolysis of Monoorganotin Trihalides, V**. Solid State 119Sn-NMR and IR Spectra of the [(i-PrSn)12O14(OH)6]2+ Ion
Authors: Reuter Hans , Sebald Angelika 
Published: March 2015

Abstract
The 119Sn-CPMAS-NMR spectra of the complex [(i-PrSn)12O14(OH6)]2+ ion were recorded for two different salts having twelve and four different tin atoms in the asymmetric unit, respectively. Both spectra agree very well with X-ray crystallographic predictions, and thus demonstrate the great sensitivity of heavy nuclei NMR spectroscopy to subtle structural changes. Infrared spectroscopy is shown to be a suitable routine detection method for the identification of this ion in the solid state.