bluuebunny/crossref_metadata_2025_split huggingface dataset:
Neue ternäre Vanadyl(IV) Komplexe mit ADP und AMP / New Ternary Vanadyl(IV) Complexes with ADP and AMP
Authors: Ferrer E. G. , Baran E. J. 
Published: February 2015

Abstract
Four new ternary VO2+ complexes, [VO HADP-dipy]. 6H2O , [VO HADP-ophen], 6H2O , [VO AMP-dipy], 6H2O and [VO AMP-ophen]. 6H2O (diny: α.α'dipyridyl; ophen: o-phenanthroline) were prepared and characterized by chemical analyses, electronic and vibrational spectra. Their bonding peculiarities are briefly discussed.
Synthese von Nitrenkomplexen mit N-Trimethylsilylanilin I. Charakterisierung und Kristallstruktur von [Re(NPh)Cl3(Et2PhP)2] und [Re(NPh)Cl3(Ph3P)2] ·1/2 CHCl3 / Synthesis of Nitrene Complexes with N –T rimethylsilylaniline I. Characterisation and Crystal Structure of [Re(NPh)Cl3(Et2PhP)2] and [Re(N Ph)Cl3(Ph3P)2] · 1/2CHCl3
Authors: Wittern Ursula , Strähle Joachim , Abram Ulrich 
Published: February 2015

trans-mer--Trichlorobis(diethylphenylphosphine)phenylnitrene rhenium(V), [Re(NPh)Cl3- (Et2PhP)2], has been synthesized from [ReOCl3 (Et2 PhP)2 ] and N-trimethylsilylaniline, while trans-mer-trichlorophenylnitrenebis (triphenylphosphine) rhenium(V), [Re(NPh)Cl3 (Ph3P)2] has been obtained via a novel route, from (Bu4N)[ReOCl4 ] and N-trimethylsilylanilin. The products were studied by mass spectrometry, IR spectroscopy and X-ray diffraction.
trans-mer-[Re(NPh)Cl3(Et2PhP)2 ] crystallizes in the monoclinic space group P21/n with a = 1498.5(3), b = 1068.6(1), c = 1784.0(4) pm and β = 91.28(1)°, Z = 4. The rhenium atom exhibits a distorted octahedral coordination with the phosphine groups in trans positions, and the Cl ligands in a meridional arrangement. The Re ≡N -C moiety is linear with a bond angle o f 169,4(5)°and a Re= N bond length o f 171.8(6) pm.
[Re(NPh)Cl3(Ph3P)2 ]· 0.5 CHCI3 crystallizes in the triclinic space group P 1̄ with a = 1232.1 (4), b= 1431.6(5), c = 2236.6(8) pm, a = 89.19(2)°, β = 80.50(2)°and γ = 88.26(2)°, Z = 4. The asymmetric unit contains two symmetry independent complex molecules of approximately the same structure, with Cl atoms meridionally arranged and the phosphine groups in trans positions. The coordination geometry is a distorted octahedron. The almost linear Re≡N -C moieties have Re≡N bond lengths of 170.2(7) and 170.8(7) pm, respectively, and Re≡N -C angles of 173.3(6)°and 175.0(7)°.
Derivate des Hydrazins als Liganden in Vanadium(IV)- und -(V)-Komplexen. Darstellung und Struktur dreier dimerer Verbindungen mit Hydrazido- und Hydrazonato-Liganden / D erivatives of H ydrazine as Ligands in V anadium (IV ) and -(V) Complexes. Synthesis and Crystal Structures of Three D im eric C om plexes with H ydrazido and H ydrazonato Ligands
Authors: Kopka Klaus , Mattes Rainer 
Published: February 2015

Abstract
The complexes [(μ-PhCONNCOPh){VOCl(NHNHCOPh)}2 ·5CH3CN, (1), [(μ-PhCONNCOPh){V(dbh)}2]-2CH3CN, (2) and [{VO}2(tbh)], (3) have been prepared by reaction of VCl2(acac)2, acac = acetylaceto n a to (l-), and VCl2(acpn), acpn = propylendiim ino-bis(acetylacetonato(2-)), with benzoylhydrazine. The structures of the centrosymmetric dimeric molecules 1 -3 have been determined by single crystal X-ray diffraction. 1 and 2 contain both doubly deprotonated N,N′-dibenzoylhydrazine as bridging, doubly N,O chelating ligand. In 1 the two remaining coordination sites at the VOCl group are occupied by the hydrazid o(1-) ligand [NHNHCOPh]- . 2 is a non-oxo vanadium(IV) complex. The coordination geometry is approximately trigonal prismatic. The π-back donating effect of the oxo function is substituted by back donation from three negatively charged enolic oxygen atoms. The V - O bond lengths range from 192.0(2) to 193.7(2) pm. 3 contains a unique highly symmetrical octadentate ligand, formed during the synthesis. It is coordinated to two oxovanadin(IV) centers by N,O chelation. The coordination geometry is square pyramidal.
Funktionalisierte tripod-Liganden mit Neopentan-Grundgerüst: Umsetzung von HOCH2C(CH2PR2)3 mit Elektrophilen / Functionalized tripod-Ligands with N eopentane Fram ew ork: R eaction of HOCH2C(CH2PR2)3 with Electrophiles
Authors: Seitz Thomas , Asam Alexander , Hüttner Gottfried , Walter Olaf , Zsolnai Laszlo 
Published: February 2015

Abstract
Several ways to functionalize hydroxy-tripod-ligands (HOCH2C(CH2PR2)3) by activation with electrophiles are presented. The use of carboxylic halides and anhydrides is shown to be generally successful for esterification reactions in a one-pot synthesis starting from the oxetanes O(CH2)2C(CH2PR2)2. Facial coordinaton of the related esters towards iron(II) and molybdenum(O) can be achieved depending on the nature of the phosphane donor groups.
If methyliodide or trimethylsilylchloride are used as electrophiles in order to functionalize the hydroxy group in HOCH2C(CH2PR2)3, it is necessary to proctect the phosphane groups by formation of the tris-borane adduct.
All new compounds have been fully characterized by the usual analytical techniques as well as by X-ray analyses on selected examples.
Synthesis, Vibrational Spectra, Mass Spectrum and Crystal Structure of Tri-n-butyltin Diphenylphosphinate (n-Bu)3SnO2PPh2
Authors: Shihada Abdel-Fattah , Weller Frank 
Published: February 2015

Abstract
Tri-n-butyltin diphenylphosphinate (n-Bu)3SnO2PPh2 has been synthesized by the reaction of (n-Bu3Sn)2O with Ph2POCl in toluene. An X-ray diffraction study of (n-Bu3)SnO2PPh2 shows that the structure is polymeric and consists of helical chains in which (n-Bu)3Sn groups are linked by O-P-O bridges. The geometry about tin is trigonal bipyramidal, with n-butyl groups in equatorial positions and an axial O-Sn-O angle of 176.2 (2)°. IR and Raman spectra of (n-Bu)3SnO2PPh2 are given and assigned. The mass spectrum is reported and discussed.
Neue Niob- und Tantalchloride der Zusammensetzung A4[M6Cl18] (A = (Ga,) In, TI; M = Nb, Ta) / New Niobium and Tantalum Chlorides of the Composition A4[M6Cl18] (A = (Ga,) In, TI; M = Nb, Ta)
Authors: Baján Béla , Meyer H.-Jürgen 
Published: February 2015

Abstract
The syntheses of new compounds of the general formula A4[Nb6Cl18] (A = Ga, In, Tl) and A4[Ta6Cl18] (A = In, Tl) are reported. The indexing of their X-ray powder patterns was performed isotypically with K4Nb6Cl18]- A single-crystal structure refinement on In4[Ta6Cl18] gave the space group C2/m, Z - 2, a = 1077.7(3) pm, b = 1542.3(5) pm, c = 960.2(2) pm, β = 117.68(2) . The structure contains [Ta6Cl12Cl6]4- ions linked via I+ ions . In+ is situated in a strongly distorted coordination sphere of Cl- .
Carben- und Carbin-Komplexe des Technetiums und Rheniums - Synthese, Struktur und Reaktionen / Carbene and Carbyne Complexes of Technetium and Rhenium - Synthesis, Structure and Reactions
Authors: Fischer Ernst Otto , Apostolidis Christos , Dornberger Ernst , Filippou Alexander C. , Kanellakopulos Basil , Lungwitz Bernhard , Müller Jakob , Powietzka Bernhard , Rebizant Jean , Roth Werner 
Published: February 2015

Abstract
Synthesis, structure and reactions of technetium and rhenium complexes bearing metal-carbon multiple bonds are reported. Addition of LiPh to Cp*M (CO)3 (1a : M = Tc; 1b: M = Re) (Cp* = η5-C5Me5) in Et2O yields the acyl complexes Li[Cp*(CO)2MC(O)Ph]·Et2O (2a: M = Tc; 2 b: M = Re). These are converted with Et3OBF4 into the carbene complexes Cp*(CO)2M = C(OEt)Ph (3a, 3b). Reaction of 3a and 3 b with BCl3 affords the carbyne complexes [Cp*(CO)2M ≡ CPh]BCl4 (4a, 4b) in high yield. The acyl complex 2b can be directly converted into the carbyne complex [Cp*(CO)2Re ≡ CPh]Br (5b), when it is treated with oxalyl bromide. Nucleophiles add at the carbynecarbon atoms of 4a and 4b, as demonstrated by the reaction with NaOCy (Cy = cyclohexyl) to afford the carbene complexes Cp*(CO)2M = C(OCy)Ph (6a, 6b). Similarly, reaction of P(OMe)3 with [Cp*(CO)2Re ≡ CPh]Cl (5b'), the latter being generated in situ from 2b and oxalyl chloride, gives the ylide complex {Cp*(CO)2Re = C[P(OMe)3]Ph}Cl (7b'). In comparison, addition of P(OMe)3 to [Cp*(CO)2Tc ≡ CPh]Cl (5a'), generated in situ from 2a and oxalyl chloride, induces a carbvne-carbonvl coupling reaction resulting in the formation of the ketenyl complex

. Thermolysis of the compounds 2a, 2b, 4a, 4b and 7b' has been studied in vacuo and the products of decomposition identified by IR spectroscopy. The solid-state structure of the carbene complexes 3 a and 3 b was determined by single crystal X-ray diffraction studies. Both compounds crystallize in the monoclinic space group P21/n with very similar unit cell data. Striking feature of the isostructural carbene complexes is the nearly perpendicular orientation of the carbene ligand relative to the Cp* ring.
Transition State Geometry and Solvent Effects in the Enantioselective Oxidation of Sulfides to Chiral Sulfoxides by Oxaziridines
Authors: Pointner Andreas , Herrmann Rudolf 
Published: February 2015

Abstract
For the enantioselective oxidation of methyl phenyl sulfide and tert-butyl methyl sulfide to the corresponding chiral sulfoxides by 3,3-dibromo-(camphorsulfonyl)oxaziridine, semiempirical calculations (MNDO, AMI, PM3) concerning transition state geometries were performed. The results show that only PM3 is able to localize a transition state. For methyl phenyl sulfide, a spiro arrangement of the oxaziridine ring and the sulfur atom explains the observed direction of the selectivity better than a planar transition state. The solvent dependence of the observed enantioselectivity is related to the calculated dipole moment of the transition state by the Kirkwood-Onsager model. In THF as solvent, its direct participation in the transition state has to be considered
Notizen: Sodium Metaperrhenate, NaReO4: High Pressure Synthesis of Single Crystals and Structure Refinement
Authors: Atzesdorfer Alexandra , Range Klaus-Jürgen 
Published: February 2015

Single crystals of sodium metaperrhenate, NaReO4, have been obtained by oxidation of rhenium metal with sodium nitrate under high pressure- high temperature conditions (modified Belttype apparatus, 4 kbar, 400 °C, Au-capsules). The crystals are tetragonal, space group I41/a, with a = 5.3654(4), c = 11.732(2) Å and Z = 4.
The structure was refined to R - 0.026, Rw = 0.013 for 382 unique, absorption-corrected reflections. The scheelite-type structure for NaReO4, proposed by Beintema in 1937, could be confirmed. It consists of isolated ReO4 tetrahedra (Re-O= 1.728(2) Å ), connected by NaOs dodecahedra (<Na- O > = 2.582(2) Å).
Ionische Phosphaniminato-Komplexe von Schwefel(IV) und Selen(IV ). Die Kristallstrukturen von [S(NPMe3)3]Cl · CH2Cl2, [S(N PPh3)3]S4N5 und [Se(NPMe3)3]Cl · C7H8 / Ionic Phosphorane Iminato Complexes of Sulfur(IV) and Selenium(IV). Crystal Structures of [S(NPMe3)3]Cl ·CH2Cl2, [S(NPPh3)3]S4N5 and [Se(NPMe3)3]Cl · C7H8
Authors: Kunkel Frank , Folkerts Hella , Wocadlo Sigrid , Kang Hak-Chul , Massa Werner , Dehnicke Kurt 
Published: February 2015

[S(NPMe3)3]Cl · CH2C12 and [S(NPPh3)3]S4N5 were prepared by the reaction of Me3SiNPMe3 or Me3SiNPPh3 with sulfur dichloride and S3N2Cl2, respectively, in CH2Cl2 solutions as colourless, moisture sensitive crystals. The corresponding selenium compound was prepared from SeCl4 and Me3SiNPMe3 in acetonitrile solution; it crystallizes from toluene solutions with one mole of toluene per formula unit. All complexes have been characterized by IR spectroscopy and by crystal structure determinations.
[S(NPMe3)3]Cl-CH2Cl2: Space group Pna21, Z = 8 , 3930 observed unique reflections, R = 0.033. Lattice dimensions at -120 °C: a = 1200.9(1), b = 1020.2(1), c = 1790.5(1) pm.
[S(NPPh3)3]S4N5: Space group P63, Z = 2, 2586 observed unique reflections, R = 0.054. Lattice dimensions at -100 °C: a = b = 1334.7(2), c = 1652.6(2) pm.
[Se(NPMe3)3]Cl · C7H8: Space group C2/c, Z = 8 , 1475 observed unique reflections, R = 0.059. Lattice dimensions at -40 °C: a = 1853.6(8), b = 1159.2(4), c = 2053.2(4) pm. β = 101.92(3)°.
All compounds contain cations [E(NPR3)3]+ (E = S, Se) with pyramidal structures. Bond lengths and bond angles are in average: S-N 162.5 pm, S-N-P 120.5° (R = Me), S-N 161.8 pm, S-N-P 119.2° (R = Ph), Se-N 177.8 pm, Se-N-P 120.3°.
2-YIidvl-1,3,2-oxathiaphosphole und -oxaselenaphosphole / 2-Ylidyl-1,3,2-oxathiaphospholes and -oxaselenaphospholes
Authors: Schmidpeter Alfred , Plank Stefan , Polborn Kurt 
Published: February 2015

Ylidyl thioxophosphines or selenoxophosphines and phenacyl halides undergo addition in a 1:1 ratio and yield in the presence of triethylamine the title compounds. The molecular structure of an ylidyl oxathiaphosphole demonstrates a strong interaction between the ylid substituent and the heterocycle, making the exocyclic PC-bond unusually short and the endocyclic PO- and PS-bonds considerably longer than normal for a pyramidal phosphorus atom.
The ylidyl chalcogenoxophosphines are oxidized by sulfur or selenium at the phosphorus atom and protonated at the ylidic carbon atom. No Wittig-type reaction is observed.
Impedance Measurements to Determine the Influence of Fluoride at Platinum Anodes During the Formation of Peroxodisulfate
Authors: Scheler Irene , Wabner Dietrich W. 
Published: February 2015

The electrode reactions at platinum anodes in 1.5 M H2SO4 + 2.3 M (NH4)2SO4 solution with and without addition of NaF (0.5 M) have been examined. Impedance spectra between 1 to 100.000 Hz were measured under galvanostatic conditions. Electrolyte, polarization, chargetransfer resistance (RD), double-layer capacitance (CD) and inductance (L) were determined.
For a constant current density, fluoride causes an increase o f CD and a decrease of RD. At a certain potential (measured and corrected by the electrolyte resistance) CD nearly remains the same with and without fluoride, whereas RD is slightly increased by fluoride.
This behaviour is explained by the double function o f the fluoride: It is adsorbed on the anode surface and causes an increase o f the real current density on the surface. Simultaneously, the evolution o f oxygen is hindered by fluoride.
Synthese und Eigenschaften von N-phosphorylierten Aminomethylen-dimethylphosphinoxiden und -sulfiden / Synthesis and Properties of N-Phosphorylated Aminomethylene-Dimethylphosphine Oxides and -Sulfides
Authors: Kaukorat Thomas , Neda Ion , Schmutzler Reinhard 
Published: February 2015

In the reaction of N-methylaminomethylene-dimethylphosphine oxide and sulfide with diethylaminotrimethylsilane, N-methyl-N-trimethylsilyl-aminomethylene-dimethylphosphine oxide (1) and sulfide (2) were formed. These compounds were allowed to react with a series of P(III)C1 compounds to give the corresponding methylaminomethylene-bridged diphosphorus compounds (3 - 10) with phosphorus in the combination λ4P(V)/λ3P(III). In the oxidation of some of these compounds by the hydrogen peroxide-urea 1:1-adduct (NH2)2CO ·H2O2 or sulfur, the corresponding λ4P-CH2-N(Me)-λ4P-derivatives (11 - 16) were formed. Different reaction behaviour was observed depending on the substituent at λ4P or on the oxidizing agent. Reaction of 1 with trimethylsilylmethyl tetrafiuorophosphorane and with bromotriphenylphosphonium bromide furnished, besides trimethylhalosilane, the corresponding diphosphorus compounds (17 ) and (18) with phosphorus in the combination λ4P(V)/λ5P(V) (17) and λ4P(V)/λ4P(V)+ (18).
Oxidation of N-diphenylphosphino-N-methyl-aminomethylene-dimethylphosphine oxide (3) by tetrachloro-o-benzoquinone led to the corresponding addition product in impure form. Reaction of 3 with hexafluoroacetone (HFA) yielded a mixture of two products which could not be separated. Both oxidation (>N-PPh2 → >N-P(:O)Ph2) and insertion of HFA into the P-N-bond (>N-PPh2 → >NC(CF3)2-O-PPh2) occurred. In the reaction of 1 with methyldichlorophosphine, both the mono- and disubstituted products, 22 and 23, were formed, independently of the reaction conditions and molar ratio of the starting compounds. The reaction of 1 with bis(diethylamino)chlorophosphine was unusual. Upon separation of both trimethylchlorosilane and dimethylaminotrimethylsilane, compounds 24 - 26 were formed, with the central phosphorus atom bearing one, two or three methylaminomethylene-dimethylphosphine oxide groups, respectively. Simultaneously, tris(diethylamino)phosphine was formed.
Vier verschiedene Koordinationspolyeder um Cu2+ im Oxid-Arsenat-Phosphat CuO(Cu,Mg)3(As1–xPxO4)2 (x = 0,3) / Four Different Coordination Polyhedra Around Copper in the Oxide-Arsenate-Phosphate CuO(Cu,Mg)3(As1-xPxO4)2 (x = 0,3)
Authors: Frerichs D. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of CuO(Cu,Mg)3[(As0.7P0.3)O4]2 have been prepared by crystallization from melts. The compound crystallizes with triclinic symmetry, space group Ci
1-P1̄, a = 6.372(4), b = 7.643(7), c = 8.175(5) Å, α = 98.59(6), β = 112.26(3), γ = 99.03(3)°, Z = 2. CuO(Cu,Mg)3[(As0.7P0.3)O4]2 is isotypic to Cu4(PO4)2O . X-ray investigations show square planar CuO4 polygons, twisted tetragonal CuO5 pyramids, CuO5 bipyramids and elongated (Cu,Mg)O6 octahedra.
Über ein niedervalentes Titan-Wolframoxid: Ti0,54W0,46O2 / On a Low Valent Titanium Tungsten Oxide: Ti0,54W0.46O2
Authors: Peters E. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of Ti0.54W0.46O2 have been prepared by CO2-LASER techniques. This phase crystallizes with a non-distorted rutile structure, space group D14
4H-P42/mnm, a = 4.6862(4), c = 2.9039(3) Å, Z = 2. Split positions of the statistically distributed metal ions show the existence of W-W pair formation as reported for pure WO2.
Zwei Beispiele fiir partielle und totale Defekte im Ba▪Ln2Mo4O16-Typ: BaCu0,41▪0,59Pr2Mo4O16 und Ba▪Yb2Mo4O16 / Two Examples of Partial and Total Defects in the Ba▪Ln2Mo4O16-Typ: BaCu0,41▪0,59Pr2Mo4O16 and Ba▪Yb2Mo4O16
Authors: Gallinat St. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Single crystals of (I) BaCu0,41Pr2Mo4O16 and (II) BaYb2Mo4O16 have been prepared by flux technique. Both compounds crystallize with monoclinic symmetry, space group C6
2h-C2/c with (I): a = 5.352(11), b = 12.888(2), c = 19.399(4) Å; β = 90.89(3)°; (II): a = 5.181(7), b = 12.467(3), c -19.350(3) Å , β -91.93(2)°, Z = 4. The crystal structure is characterized by 1
∞[BaMO12]-chains along [010]. In the first case the M positions are occupied by copper by about 41%, in the second case these positions remain completely unoccupied. With respect to the crystal chemistry of the reference compound Ba(Cu0.22Mg0,78)Nd2Mo4O16 all substances of the composition BaLn2Mo4O16 should be written as Ba▪Ln2Mo4O16 indicating the holes in the 1
∞[BaMO12]-chains by ▪.
Monomere Iodide von o-substituierten Aryl-Gallium- und Indiumverbindungen / Monomeric Iodides of o-Substituted Aryl Gallium and Indium Compounds
Authors: Meller Anton , Kümmel Christoph , Noltemeyer Mathias 
Published: February 2015

Abstract
Monomerie diiodides of 2,4,6-tri(tert-butyl)phenyl = (s-Mes), 2,4,6-triisopropylphenyl = (Trip)-and 2,4-di-tert-butyl-6-methylphenyl = (DBMP)-gallium and -indium were prepared by the reaction of the lithiated aryls with MI3 (M = Ga, In) in hexane/Et2O. s-MesInI2 (1), s-Mes2InI (2), s-MesGaI2 (3), s-Mes2GaI (4), Trip2InI (5) and (DBMP)2InI (6) were obtained and characterized by their mass and NMR spectra (1H, 13C), and/or by elemental analyses. An X-ray crystal structure analysis was carried out for 1.
Binding of Cations to 4f Metal Ions : Preparation and Properties of Lanthanide(III) Complexes Containing the Phenelzinium(1+) Cation as a Ligand
Authors: Lalioti Nickolia , Tsangaris John M. , Zafiropoulos Th. F. , Perlepes Spyros P. 
Published: February 2015

Abstract
Treatment of Ln2(SO4)3·nH2O (Ln = La, Ce, Pr, Nd, Sm. Eu, Gd ; n = 8, 9) with phenelzine dihydrogen sulfate, (phzH2) SO4, in 1N H2SO4 yields polymeric complexes with the general formula [Ln(SO4)2(H2O)2(phzH)], which contain the phzH+ cation as a ligand. The compounds have been characterized by elem ental analyses, X-ray powder patterns, thermal methods, magnetic susceptibilities and spectroscopic (IR, Raman, electronic diffuse reflectance and solid-state emission f-f spectra) studies. The prepared complexes most probably consist of 7-coordinated units, formed by four bridging bidentate sulfato groups, two terminal aqua molecules and one cationic phzH+ ligand.
Das Te4
2+-Polykation in den Strukturen von Te4(NbCl6)2, Te4(TaCl6)2, Te4(TaBr6)2 und Te4(Ta2OBr10) / The Te4
2+ Polycation in the Structures of Te4(NbCl6)2, Te4(TaCl6)2, Te4(TaBr6)2 and Te4(Ta2OBr10)
Authors: Beck Johannes , Bock Gunter 
Published: February 2015

Abstract
The reactions of Te, TeCl4 and MCl5 (M = Nb, Ta) in a sealed evacuated ampoule at 170 °C yield Te4(NbCl6)2 and Te4(TaCl6)2 as black, moisture sensitive crystals. Te4(TaBr6)2 is obtained from Te2Br and TaBr3 at 175 °C, and Te4(Ta2OBr10) is obtained in small yields as byproduct. The crystal structure determinations (all triclinic, P1, lattice constants for Te4(NbCl6)2: a = 654,2 pm, b = 673,9 pm, c = 1200,3 pm, α = 94,54°, β = 97,59°, γ = 85,29°, V = 521,5 -106 pm3, Z = 1; for Te4(TaCl6)2: a = 651,2(5) pm, b = 747,2(7) pm, c = 1107(1) pm, a = 100,33(8)°, β = 102,29(8)°, y = 89,24(8)°, V = 517,4 -106 pm3, Z = 1; for Te4(TaBr6)2: a = 680,9(3) pm. b = 710,4(3) pm, c = 1239,9(5) pm, α = 95,29(4)°, β = 98,05(4)°, γ = 85,31(4)°, V = 589,8 -106 pm3, Z = 1; for Te4(Ta2OBr10): a = 692,2(5) pm, b = 877,2(7) pm. c = 917(1) pm, α = 81,91(9)°, β = 86,39(9)°, γ = 74.23(6)°, V= 530,3-106 pm3, Z = 1) have shown, that all compounds contain nearly square planar Te4
2+ ions. Te4(TaCl6)2 and Te4(TaBr6)2 have distorted octahedral TaCl6- and TaBr6- ions. Te4(NbCl6)2 is isostructural to Te4(TaBr6)2 as was shown by the coincident lattice constants. Te4(Ta2OBr10) is isomorphous to Te4(Nb2OCl10) and contains a Ta2OBr10
2- ion in the form of two edge-sharing octahedra with the O atom in the centre of a linear Ta=O=Ta bridge. All structures adopt simple structure types. The arrangement of the ions in the compounds Te4(MX6)2 (M = Nb, Ta, W; X = Cl. Br) corresponds to the CdI2 structure type, and in Te4(Ta2OBr10) to the CsCl structure type. An analysis of the Te···Te bond length in Te4
2+ and the distance of Te···X (X = Cl, Br) contacts to the nearest neighbour halide anions in several Te4
2+-halometallates shows a clear correlation. Shortening of the Te···X contacts elongates the Te-Te bonds by a donor interaction of the halide ions with Te-Te-σ* orbitals.
Über verbesserte Darstellungsmethoden für CF3OCH3 / Improved Methods to Prepare CF3OCH3
Authors: Minkwitz Rolf , Konikowski Detlef 
Published: February 2015

Abstract
The reaction of CH3I with CF3OCl at 203 K yields CF3OCH3. The preparation of the ether by methylation of CsOCF3 with (CH3)2SO4 is also described.
Crystal Structure of Bis(3-Diethylamino-5-phenyl-1,2,4-dithiazolium) Hexachlorodicuprate, (dpd)2Cu2Cl6, at 120 K.
Authors: Fernández Vicente , Hartung Jürgen , Beyer Lothar , Kivikoski Jussi , Howard Judith A. K. 
Published: February 2015

Abstract
The crystal structure of the compound (dpd)2Cu2Cl6 at 120 K has been determined. Space group P21 /n , Z = 2, 3997 collected reflections, R = 6.8. Lattice dimensions (120(1)K) : a = 7.328 (8), b = 16.863 (14), c = 13.271 (10) Ä; β = 91.44(7).
Über ein Barium-Lanthanoid-Oxozinkat-Platinat(IV): Ba17Yb16Zn8Pt4O57
Authors: Rabbow Ch. , Sfreddo O. , Müller-Buschbaum Hk. 
Published: February 2015

Abstract
Reactions of BaCO3, ZnO and Yb2O3 mixtures at temperatures up to 1300 °C using plati­num crucibles led to yellow needles of Ba17Y b16Zn8Pt4O57. The compound crystallizes with a hitherto unknown tetragonal crystal structure, space group C5
4h-I4/m, a = 22.731(1), c = 5.682(1) Å , Z = 2. The crystal structure is characterized by PtO6 octahedra and tetragonal ZnO5 pyramids. Yb3+ shows a mono-capped trigonal prismatic coordination and Ba2+ several different coordination environments (C .N = 9 to 10, by O2-). The relationship to the Ba5Ln8M4O21 type is discussed.