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1995[X]
61Author    Z. NaturforschRequires cookie*
 Title    In2.24(NCN)3 and NaIn(NCN)2: Synthesis and Crystal Structures of New Main Group Metal Cyanamides  
 Abstract    Single crystals of In2.24(N C N)3 and N aIn(N C N)2 can be synthesized from a reaction be­ tween InBr and NaCN at 400 °C, followed by chemical transport at 4 0 0 -5 0 0 °C. The X-ray crystal structure determinations of In2.24(N C N)3 (rhombohedral R 3c, a = 606.09(4), c -2884.4(2) pm, Z = 6) and N aIn(N C N)2 (orthorhombic Cmcm, a = 961.30(6), b = 716.84(5), c = 603.65(4) pm, Z = 4) reveal ionic layer structures built from sheets of cationic and anionic (cyanamide) motifs. While N aIn(N C N)2 contains In3+ and N a+ ions, In2 24(N C N)3 is a mixed-valence compound, incorporating a m onovalent In+ ion besides trivalent indium. The N CN 2~ units of both In2,24(N C N)3 and N aIn(N C N)2 reflect perfect D xll point group symmetry within the limits of experimental accuracy. Furthermore, an evaluation of all presently available crystallographic data on metal cyanamide crystal structures manifests that there is no evi­ dence for a non-centrosymmetric description o f any of these. Likewise, we propose an alter­ native centrosymmetric structural model for lead cyanamide, PbNCN, and question the evi­ dence of the unsymmetrical, non-D xh shaped cyanamide anion in the latter structure. 
  Reference    Z. Naturforsch. 50b, 1245—1251 (1995); received April 11 1995 
  Published    1995 
  Keywords    Indium Cyanamide, Indium Sodium Cyanamide, Crystal Structure, Cyanamide Molecular Symmetry 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1245.pdf 
 Identifier    ZNB-1995-50b-1245 
 Volume    50 
62Author    E. Peters, Hk Müller-BuschbaumRequires cookie*
 Title    Synthese eines Pyrochlors mit Ti11: (Tao^Ti1o,33)2Sm20 7 Synthesis of a Pyrochlore Containing Ti11  
 Abstract    High temperature reactions using a C 0 2-LA SER led to a Ti11 containing phase o f the com position (T ao^yT i^^^Sn^O y, space group O 7 -Fd3m (No. 227), a = 10.385(2) Ä . The oxidation state Ti11 which is stabilized by incorporation into the cubic pyrochlore structure was proved by the statistical occupation of the 16c 
  Reference    Z. Naturforsch. 50b, 1340—1342 (1995); eingegangen am 2. Mai 1995 
  Published    1995 
  Keywords    Titanium(II), Tantalum, Rare Earth, Oxide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1340.pdf 
 Identifier    ZNB-1995-50b-1340 
 Volume    50 
63Author    Abdel-Fattah Shihada, Frank WellerbRequires cookie*
 Title    Synthesis, Vibrational Spectra, Mass Spectrum and Crystal Structure of Tri-n-butyltin Diphenylphosphinate (n-Bu)3S n 0 2PPh2  
 Abstract    Tri-/?-butyltin diphenylphosphinate (/?-Bu)3S n 0 2PPh2 has been synthesized by the reaction o f («-B u 3Sn)20 with Ph2POCl in toluene. An X-ray diffraction study of (/?-Bu3) S n 0 2PPh2 shows that the structure is polymeric and consists of helical chains in which (/7-Bu)3Sn groups are linked by O-P-O bridges. The geometry about tin is trigonal bipyramidal, with «-butyl groups in equatorial positions and an axial O -S n -O angle of 176.2 (2)°. IR and Raman spectra of («-B u)3SnÖ2PPh2 are given and assigned. The mass spectrum is reported and discussed. 
  Reference    Z. Naturforsch. 50b, 1343—1347 (1995); received D ecem ber 12 1994 
  Published    1995 
  Keywords    Crystal Structure, Vibrational Spectra, Mass Spectrum, Tri-n-butyltin Diphenylphosphinate 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1343.pdf 
 Identifier    ZNB-1995-50b-1343 
 Volume    50 
64Author    Frank Steffen, G. Erd, MeyerRequires cookie*
 Title    [Er14(C2)2 (N )2 ] l24 -ein Iodid mit einem oligom eren, heterointerstitiellen Cluster [E r14(C2)2(N)2]l24 -an Iodide with an Oligomeric, H eterointerstitial Cluster  
 Abstract    [Er14(C2)2(N)2]l24 (triclinic, P I, a = 966.3(4) pm. b = 1027.6(2) pm. c = 1663.4(4) pm, « = 101.374(9)°, ß = 92.853(14)°, y = 112.83(2)°, Z = 2) is obtained as red-brown single crystals through a conproportionation reaction of E rl3 and erbium in the presence of carbon and N aN 3 in a sealed niobium container. It contains discrete, tetrameric [Er14(C2)2(N)2] clusters that are built from two octahedra and two tetrahedra connected via com ­ mon edges. The octahedral voids are filled with C2 units and the tetrahedral voids with N atoms. Each discrete [Erj4(C2)2(N)2] cluster is surroun­ ded by 32 iodide ligands which connect six clu­ sters via i-a and a-a bridges. 
  Reference    Z. Naturforsch. 50b, 1570—1573 (1995); eingegangen am 7. April 1995 
  Published    1995 
  Keywords    Rare Earth Elements, Halides, Cluster, Erbium Iodide Dicarbide Nitride, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1570_n.pdf 
 Identifier    ZNB-1995-50b-1570_n 
 Volume    50 
65Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Cox 5Ti0 5(B 0 3) 0 and Co! 5Zro.5(B 0 3) 0  
 Abstract    Single crystals of Co15Tio.5(B 0 3)0 (I) and Coj 5Zr0 5(BO3)O (I I) were obtained by a B20 3 flux technique. Both compounds crystallize with orthorhombic symmetry, space group D -Pnma (Nr. 62), I a = 928.1; b = 311.1; c = 940.1 pm; Z = 4 and I I a = 949.5; b = 323.42; c = 934.7 pm; Z = 4. The compounds are isotypic to the mineral warwickite. All metal ions are octahedrally coordinated by oxygen ions. The structure contains isolated, trigonal planar B 0 3 units and oxygen that is not coordinated to boron. Die Synthese und Kristallstruktur von cobalthaltigen Boratoxiden: Coi^Tio,5(B03)0 und C o i?5Zr<),5(B03)0 
  Reference    Z. Naturforsch. 50b, 1653—1657 (1995); eingegangen am 4. Mai 1995 
  Published    1995 
  Keywords    Cobalt, Titanium, Zirconium, Borate Oxide, Crystal Structure, X-Ray 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1653.pdf 
 Identifier    ZNB-1995-50b-1653 
 Volume    50 
66Author    Oliver Seidelmann, Lothar Beyer, Rainer RichterRequires cookie*
 Title    N,N-Disubstituierte N'-Ferrocenoylthioharnstoffe als zweizähnige Komplexliganden für Übergangsmetallionen. Kristallstruktur von Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) N,N-Disubstituted N'-Ferrocenoyl Thioureas as Bidentate Ligands for Transition Metal Ions. Crystal Structure of Bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II)  
 Abstract    N,N-diethyl-N'-ferrocenoyl-thiourea and N-(morpholino-thiocarbonyl)ferrocenecarboxylic amide have been prepared by the reaction of ferrocenoyl chloride with potassium thiocyanate and the respective amine in dry acetone. These bidentate ligands yield neutral heterometal-lic complexes with Ni(II), Cu(II), Mn(II) and Co(III). The dark brown air stable crystals of bis-(N,N-diethyl-N'-ferrocenoylthioureato)nickel(II) were characterized by X-ray structure de­ termination. Lattice dimensions: a = 1870.9(1), b = 1161.5(1), c = 1491.4(1) pm; space group Pca2!, Z = 4, R = 0.030 for 5707 observed reflections. 
  Reference    Z. Naturforsch. 50b, 1679—1684 (1995); eingegangen am 23. März 1995 
  Published    1995 
  Keywords    Ferrocene Complexes, Thiourea, Hetero Metal Complexes, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1679.pdf 
 Identifier    ZNB-1995-50b-1679 
 Volume    50 
67Author    Z. NaturforschRequires cookie*
 Title    Com plex F orm  
 Abstract    ation and M etal E x tractio n with H eterocyclic /3-Dicarbonyl C om pounds as C om parison. S tru ctu re of 3-Phenyl-4-benzoyl-5-isoxazolone E rh ard U hlem ann*, A lw in Friedrich, G erald H insche, W ulfhard M ickler, Acid constants and stability constants of nickel and zinc chelates with 2-thenoyltrifluoro-acetone, dibenzoylmethane, l-phenyl-3-methyl-4-benzoyl-5-pyrazolone and 3-phenyl-4-ben-zoyl-5-isoxazolone were compared. The extraction of copper was studied. Thermoanalytic measurements were made using the ligands and their copper compounds in the solid state. The molecular structure of 3-phenyl-4-benzoyl-5-isoxazolone was determined by X-ray analy­ sis. Crystal data: a = 874,7(2), b = 1959,2(7), c = 897,38(7) pm; ß = 101,030(7)°; space group P 12j/c 1; Z = 4; R = 0,043; 1920 observed, unique reflexions. 
  Reference    (Z. Naturforsch. 50b, 37—42 [1995]; eingegangen am 11. Juli 1994) 
  Published    1995 
  Keywords    3-Phenyl-4-benzoyl-5-isoxazolone, Crystal Structure, Thermal Stability, Complex Stability Constants, Dioxane/Water-Mixtures 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0037.pdf 
 Identifier    ZNB-1995-50b-0037 
 Volume    50 
68Author    Michael Born, Dietrich Mootz, Sigrid SchaefgenRequires cookie*
 Title    Tautomere Wasserschichten. Bildung und Struktur tiefschmelzender Trihydrate von Triethylamin und 4-Methylpyridin [1] Tautomeric Water Layers. Formation and Structure of Low-Melting Trihydrates of Triethylamine and 4-Methylpyridine [1]  
 Abstract    Low-melting trihydrates of triethylamine (E t3N) and 4-methylpyridine (4-M ePy) have been confirmed and detected by phase analysis and the crystal structures determined. Both are monoclinic with space group P 2!/c and Z = 4 formula units per unit cell. The lattice parameters are a = 13.606, b = 6.291, c = 12.412 A , and ß = 99.47° at -1 0 0 °C for Et3N -3 H 20 , and a = 9.982, b = 6.877, c = 12.958 Ä , and ß = 103.50° at -9 0 °C for 4-M eP y-3 H20 . The water m olecules in the two structures are hydrogen-bonded in condensed four-, five-, and six-membered rings with 1:2:1 ratio, thus forming characteristic layers parallel (1 0 0) of identical topology and tautomeric to each other. The amine m olecules are linked to both sides of the layers by O -H — N bonds from different O atoms. 
  Reference    (Z. Naturforsch. 50b, 101—105 [1995]; eingegangen am 11. August 1994) 
  Published    1995 
  Keywords    Am ine Hydrates, Crystal Structure, Hydrates, Hydrogen Bonding, M elting Diagram, Water Layers 
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 Identifier    ZNB-1995-50b-0101 
 Volume    50 
69Author    AndreasF. Stange, Eberhard Waldhör, Michael Moscherosch, Wolfgang KaimRequires cookie*
 Title    Variable Structure of the Cu2S2 Core in Doubly Thiolate-Bridged Dicopper(I) Complexes. An X-Ray Crystallographic, Electrochemical and EPR Study of (dmp)2 (o-CH3 C6H4S)2Cu2 , dmp = 2,9-Dimethyl-l,10-phenanthroline, and a Comment on the Nature of Phenanthroline-Containing "Cu(0)" Complexes  
 Abstract    The molecular and crystal structure of the dicopper(I) complex (dm p)2(M-o-CH3C6H4S)2Cu2 (1), dmp = 2,9-dim ethyl-l,10-phenanthroline, has been deter­ mined. With Cu/S/Cu and S/Cu/S bond angles between 80 and 100°, the planar structure of the central CuSCuS four-membered ring is much more symmetric for 1 as compared to the analogous complex 2 of unsubstituted 1,10-phenanthroline which has a folded Cu2S2 core with bond angles between 67 and 108°. This result illustrates a considerable structural flexi­ bility of the LCu(m-SR)2CuL entity which is being discussed as a possible model for CuA centers of cytochrome c oxidase or nitrous oxide reductase. Oxidation of both com plexes 1 and 2 remains irreversible even at cyclovoltammetric scan rates o f 1 V/s. However, the methyl substitution in complex 1 causes increased reversibility of the electronically coupled dmp-based reduction processes. Accordingly, the EPR spectrum of l -* is characterized by hyper-fine splitting from dmp--and a relatively small 63 " Cu coupling of 0.53 mT. The stabilization of 2,9-disubstituted 1,10-phenanthroline radical anions by coordination to Cu(I) is also dem ­ onstrated by detection of a single broad EPR line at g 2.0028 for the formal "C u(0)" complex Cu(dpp)2 = CuI(dpp_-)(dpp), dpp = 2,9-diphenyl-l,10-phenanthroline. While the EPR signal of Cu(dpp)2 loses intensity on cooling, possibly due to dimerization and spin-pairing, the distorted tetrahedral configuration with essential orthogonal arrangement of dpp jz systems seem s to disfavour an intramolecular electron hopping. 
  Reference    (Z. Naturforsch. 50b, 115—122 [1995]; received July 25 1994) 
  Published    1995 
  Keywords    Crystal Structure, Copper Complexes, Sulfur Ligands, 1, 10-Phenanthrolines, EPR Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0115.pdf 
 Identifier    ZNB-1995-50b-0115 
 Volume    50 
70Author    Peter Dierkes, Gerlinde Frenzen, Sigrid Wocadlo, W. Erner Massa, Stefan Berger, Jürgen Pebler, Kurt DehnickeRequires cookie*
 Title    Komplexe des Typs [MCl4(SEt2)2] mit M = Mo und W. Kristallstrukturen, NMR-Spektren und magnetisches Verhalten [MCl4(SE t2)2] Complexes with M = Mo and W. Crystal Structures, NMR Spectra, and Magnetic Behaviour  
 Abstract    The crystal structures of the thioether complexes [MCl4(SEt2)2] with M = Mo and W have been solved by X-ray methods. Both compounds crystallize isotypically in the triclinic space group P I with two formula units per cell unit. The metal atoms are octahedrally coordinated by four chlorine atoms and by the two sulfur atoms of the thioether molecules in trans­ position (symmetry Q) with bond lengths (average): M o -C l 233.1, M o -S 253.4, W -C l 233.1, and W -S 251.7 pm. Both complexes were also characterized by !H and 13C NM R spectro­ scopy as well as by measurement of the magnetic susceptibilities in the tem perature range from 1.8 to 350 K. 
  Reference    Z. Naturforsch. 50b, 159—167 (1995); eingegangen am 23. August 1994 
  Published    1995 
  Keywords    D iethylthioethers of Molybdenum and Tungsten, Crystal Structure, NMR Spectra, Magnetic Susceptibility 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0159.pdf 
 Identifier    ZNB-1995-50b-0159 
 Volume    50 
71Author    Hans Bock, Sabine Nick, Christian Näther, Wolfgang BenschRequires cookie*
 Title    Wechselwirkungen in Kristallen, 63 [1, 2]  
 Abstract    Kristallisation und Strukturbestimmung von 1,2-Dimesitoylbenzol und von Bis(hydrogen-l,2-dimesitoylbenzol)-dinatrium-bis(ethylendiamin) Interactions in Crystals, 63 [1, 2] Crystallization and Structure Determ ination of 1,2-Dimesitoylbenzene and of Bis(hydrogen-l,2-dimesitoylbenzene)-disodium-bis(ethylendiamine) 
  Reference    Z. Naturforsch. 50b, 605 (1995); eingegangen am 18. August 1994 
  Published    1995 
  Keywords    1, 2-Dimesitoylbenzene, Radical A nion Sodium Salt, Single Crystal Structures, M N D O Calculations 
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 Identifier    ZNB-1995-50b-0605 
 Volume    50 
72Author    Konstantina Kehagia, Alexander Dömling, Ivar Ugi, Wolfgang Hiller, Jürgen RiedeRequires cookie*
 Title    N e w Synthesis and Structure Determination o f 13-Aza-4,-trioxatricyclo[7,3>l?05'13]tridecane  
 Abstract    A new 13-Aza-4,4,8,8,12,12-hexamethyl-2,6,10-trioxatricyclo[7,3,l,05'13]tridecane synthesis and the crystal structure are reported. It crystallizes in the monoclinic space group P2Jn with a = 1201.9(1) pm, b = 1436.6(1) pm, c = 1726.2(2) pm, ß = 90.74(1)° and Z = 8. 
  Reference    Z. Naturforsch. 50b, 667—670 (1995); received August 2 1994 
  Published    1995 
  Keywords    Asinger Condensation, C3-Symmetric Heterocycle, 5, 6-Dihydro-2//-l, 3-oxazine, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0667.pdf 
 Identifier    ZNB-1995-50b-0667 
 Volume    50 
73Author    Z. NaturforschRequires cookie*
 Title    Organosubstituierte  
 Abstract    l,6,2,5-Azoniathiasilaboratabicyc!o[3.3.0]oct-3-ene -Herstellung und Kristallstruktur [1] O rg anosubstituted 1,6,2,5-A zoniathiasilaboratabicyclo[3.3.0]oct-3-enes -P rep aratio n and Crystal Structure [1] R oland K östera *, G ü n te r Seidel3, B ernd W rackm eyerb, R oland B oesec The heterocycles MeNSi(Me2)C(R3)=C (Et)B Et [R3 = Me: A; R3 = C(M e)=CH 2: B] react with 2-aminoethanet'nioi (i) by elimination of M eNH 2 to give the monocyclic H N CH 2CH2SSi(Me2)C (R)=C (Et)B Et [R = Me: 3a; R = C(M e)=CH 2: 3b] and the ther-mically more stable bicyclic compounds H NSi(Me2)C (R)=C (E t)B (E t)SC H 2CH 2 [R = Me: 4a; R = C(M e)=CH2: 4b], 4a crystallizes in the monoclinic space ^ ro u p P2i/c [lattice con­ stants (at 120 K) a = 9.3239(10), b = 8.9225(11), c = 17.3958(23) A; ß = 92.207(9)°] with a folded bicyclic ring system. c/s-ClB(Et)C=C(M e)Si(M e2)Cl (C) and Na2-lB E t3 (prepared from 1 and N aH BEt3) form by elimination of M eNH2 preferentially 3 a and minor amounts of 4a. A reacts with o-aminothiophenol (2) via H NSi(Me2)C(M e)=C (Et)B (Et)S(oC 6H 4) (5) to NSi(Me2)C(M e)=C(Et)BS(oC6H 4) (6) and the products 7-10. 
  Reference    Z. Naturforsch. 50b, 959—968 (1995); eingegangen am 24. November 1994 
  Published    1995 
  Keywords    2, 5-Dihydro-l, 2, 5-azasilaboroles, Am inothioalkanes(arenes), Bicyclic Heterocycles, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0959.pdf 
 Identifier    ZNB-1995-50b-0959 
 Volume    50 
74Author    Hans-Christian Böttcher3-, Helmut Hartungb, Andre KrugbRequires cookie*
 Title    Synthese und Kristallstruktur des koordinativ ungesättigten Komplexes [FeRu(CO)5(//-P B u92] Synthesis and Crystal Structure of the Coordinatively Unsaturated Complex [FeR u(C O )5Cu-PBu92]  
 Abstract    [{Ru(CO)3C12}2] reacts with the in situ prepared reagent Li2[Fe(CO)3(PBu2)2] to give the new heterobinuclear complex [FeRu(CO)5(w-PBu92] (!) • Crystals of 1 are isomorphous to those of the known compound [Fe2(CO)5(a-PBu2)2] (2) and crystallize in the triclinic space group P 1 with a = 867,5(1), b = 1181,0(2), c = 1373,1(2) pm; a = 76,64(1), ß = 79,72(1) and y = 76,48(1)°. A double bond between the two metal atoms concluded for 2 from the results of EHMO calcula­ tions is also proposed for 1 (Fe=Ru: 259,8(1) pm). 
  Reference    Z. Naturforsch. 50b, 1175—1180 (1995); eingegangen am 19. Januar 1995 
  Published    1995 
  Keywords    Iron-Ruthenium Complex, H eterobinuclear Carbonyl Complex, Iron-Ruthenium Double Bond, Crystal Structure, Molecular Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1175.pdf 
 Identifier    ZNB-1995-50b-1175 
 Volume    50 
75Author    Bert Werner, Bernhard NeumüllerRequires cookie*
 Title    [(TM ED A)2Li4Cl4(H20)2]*2 TMEDA: stabförmige vierkernige Li-Komplexe verknüpft durch TMEDA [(TM EDA)2Li4Cl4(H20)2]-2 TMEDA: Stick-Like Tetranuclear Li Complexes Connected by TM EDA  
 Abstract    The title compound 1 was synthesized by the reaction of LiCl with T M ED A (N ,N,N ',N '-tetramethylethylendiamine) and water at 120 °C in boiling TM EDA. 1 was crystallized at -3 0 °C as colorless crystals and characterized by NM R and IR spectroscopy as well as by an X-ray structure determination. 1 is a polymer in the solid state, built up by an alternating arrangement of stick-like tetranuclear Li complexes and two T M ED A molecules. The com ­ plexes and the T M ED A molecules are connected by hydrogen bridges in infinite chains. 
  Reference    Z. Naturforsch. 50b, 1348—1352 (1995); eingegangen am 27. Februar 1995 
  Published    1995 
  Keywords    Lithium Complex, T M ED A Adduct, Adduct of H 20, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1348.pdf 
 Identifier    ZNB-1995-50b-1348 
 Volume    50 
76Author    Béla Baján, H.-Jürgen MeyerRequires cookie*
 Title    Neue Niob-und Tantalchloride der  
 Abstract    Zusammensetzung A4[M6C118] (A = (Ga,) In, TI; M = Nb, Ta) New Niobium and Tantalum Chlorides of the Composition A4[M6C118] (A = (Ga,) In, TI; M = Nb, Ta) The syntheses of new compounds of the general formula A4[Nb6Cli8] (A = Ga, In, Tl) and A4[TaöCli8] (A = In, Tl) are reported. The indexing of their X-ray powder patterns was performed isotypically with K^NböClis]-A single-crystal structure refinement on In4[Ta6Clis] gave the space group C2/m, Z -2, a = 1077.7(3) pm, b = 1542.3(5) pm, c = 960.2(2) pm, ß = 117.68(2) . The structure contains [TaöCliiClö] strongly distorted coordination sphere of Cl -. 
  Reference    Z. Naturforsch. 50b, 1373—1376 (1995); eingegangen am 16. Januar 1995 
  Published    1995 
  Keywords    Niobium and Tantalum Chloride Clusters, Monovalent Ga, In, TI, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1373.pdf 
 Identifier    ZNB-1995-50b-1373 
 Volume    50 
77Author    W. S. Sheldrick, B. SchaafRequires cookie*
 Title    Ditelluridogermanaten(IV) der Alkalimetalle K -C s M ethanolotherm al Synthesis and Crystal Structure of Diselenido-and Ditelluridogerm anates(IV ) of the Alkali Metals K -C s  
 Abstract    Methanolothermal reaction of M2C 0 3 (M = K, Rb) with Ge and Se yields respectively the diselenidogerm anates(IV) K2G eS e4 and Rb2G eSe4, both of which contain chain anions ro[GeSe42_] in which G eS e4 tetrahedra are linked via S e -S e bonds. A similar structural principle is found in the ditelluridogermanates(IV) Rb2GeTe4 and Cs2GeTe4, prepared by reaction of M2C 0 3 (M = Rb, Cs) with Ge and Te in methanol at temperatures o f respectively 200 and 160 °C. The effect of cation size on the chain conformation is discussed. Rb4G e4S eU)CH3O H , which is formed together with Rb2G eSe4, exhibits isolated anions [G e4S e 10]4_ with an adamantane-like structure. Methanolothermale Synthese und Kristallstruktur von Diselenido-und 
  Reference    Z. Naturforsch. 50b, 1469—1475 (1995); eingegangen am 31. März 1995 
  Published    1995 
  Keywords    Selenidogerm anates(IV ), Telluridogermanates(IV), Alkali Cations, Methanolothermal Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1469.pdf 
 Identifier    ZNB-1995-50b-1469 
 Volume    50 
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