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  • 1980-1984  (1)
  • 1975-1979  (1)
  • Chemistry  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 454 (1979), S. 134-144 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cobalt(II) Hydrogenarsenate Monohydrate. Preparation and Crystal StructureCo[H2O|HOAsO3] was prepared by heating of As2O5, CoSO4 · 7 H2O and H2O at 150°C in a sealed tube and investigated by X-rays. The compound crystallizes triclinic, space group P¯1 with a = 786.5, b = 1569.9, c = 671.9 pm, α = 94.25, β = 96.89, γ = 90.28° and Z = 8.The structure contains chains of edge-shared CoO6 octahedra connected by AsO4 tetrahedra forming sheets. Two of such somewhat different sheets built up the whole structure. Based on the charge balance derived from the geometrical data and the IR spectra the occurrence of hydrogen bridges is discussed.
    Notes: Co[H2O|HOAsO3] wurde durch Erhitzen von As2O5, CoSO4 · 7 H2O und H2O auf 150°C im Autoklaven dargestellt und röntgenographisch untersucht. Die Verbindung kristallisiert triklin, Raumgruppe P¯1 mit a = 786,5, b = 1569,9, c = 671,9 pm, α = 94,25, β = 96,89, γ = 90,28° und Z = 8. Die Struktur enthält Ketten aus kantenverknüpften CoO6-Oktaedern, welche über AsO4-Tetraeder zu Schichten verknüpft sind. Zwei solche etwas verschiedenartige Schichten bilden die Gesamtstruktur. Anhand der aus den geometrischen Daten berechneten Ladungsbilanz und der IR-Spektren wird das Auftreten von Wasserstoffbrücken diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: AgCo3H2(AsO4)3 and AgZn3H2(AsO4)3. Preparation and Crystal Structure. Another New Structure Type of an ArsenateAgCo3H2(AsO4)3 (1) and AgZn3H2(AsO4)3 (2) were prepared by heating of As2O5, AgNO3, CoSO4 · 7H2O, ZnSO4 · 7H2O, respectively, and water in a sealed tube at 300°C and investigated with X-rays. Both compounds are isotypic and crystallize in the monoclinic space group C2/c with 4 formula units per cell. The lattice parameters are (1): a = 1215.9(6), b = 1243.8(7), c = 678.2(3) pm, β = 113.16(3)° (2): a = 1216.9(2), b = 1249.5(3), c = 675.5(1) pm, β = 112.77(1)°. The structure contains chains of edge-shared CoO6 or ZnO6 octahedra, respectively, which are connected by AsO4 tetrahedra and silver oxygen ribbons with square planar coordinated silver forming a framework. Based on the charge balances derived from the geometrical data and the IR spectra the occurence of hydrogen bonds is discussed.
    Notes: AgCo3H2(AsO4)3 (1) und AgZn3H2(AsO4)3 (2) wurden durch Erhitzen eines Gemisches von As2O5, AgNO3, CoSO4 · 7H2O bzw. ZnSO4 · 7H2O und Wasser auf 300°C im Autoklaven dargestellt und röntgenographisch untersucht. Beide Verbindungen sind isotyp und kristallisieren in der monoklinen Raumgruppe C2/c mit 4 Formeleinheiten in der Elementarzelle. Die Gitterkonstanten sind: (1) a = 1215,9(6), b = 1243,8(7), c = 678,2(3) pm, β = 113,16(3)° (2) a = 1216,9(2), b = 1249,5(3), c = 675,5(1) pm,β = 112,77(1)°. Die Struktur enthält Ketten aus kantenverknüpften CoO6- bzw. ZnO6-Oktaedern, welche über AsO4-Tetraeder, sowie über Silber-Sauerstoff-Bänder mit quadratisch-planar koordiniertem Silber zu einem Gerüst verknüpft sind. Anhand der aus den geometrischen Daten berechneten Ladungsbilanzen und der IR-Spektren wird das Auftreten von Wasserstoffbrücken diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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