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  • Organic Chemistry  (2)
  • 1970-1974  (2)
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  • 1970-1974  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Infrarotspektroskopische und thermoanalytische Untersuchung von Trikobalt(II)-dihydroxidsulfat-dihydrat, Co3(OH)2(SO4)2 · 2H2O (1971)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 54 (1971), S. 1628-1637 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The infrared spectra between 600 and 4000 cm-1 of Co3(OH)2(SO4)2 · 2H2O, Co3(OH)2(SO4)2, and Co3(OD)2(SO4)2 · 2D2O are reported and discussed. The spectra are mainly examined in relation to the binding state of the water molecules. The results are in good agreement with the previously described crystal structure studies. Thermogravimetry, differential thermal analysis and X-ray diffraction methods were used to investigate the unusual thermal decomposition behaviour of Co3(OH)2(SO4)2 · 2H2O. The kinetics of the dehydration reaction are discussed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19710540614
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  • 2
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von Trikobalt(II)-dihydroxidsulfat-dihydrat, Co3(OH)2(SO4)2 · 2 H2O (1971)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 54 (1971), S. 1621-1628 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tricobalt (II)-dihydroxidesulfate-dihydrate, Co3(OH)2(SO4)2 · 2H2O, is orthorhombic: a = 7.21, b = 9.77, c = 12.86 Å, V = 905.9 Å3, space group D112h-Pbcm with four formula units per cell. The atomic positions have been determined by threedimensional Patterson and Fourier synthesis and full-matrix least-squares refinement of single crystal X-ray diffraction data.The structure shows infinite chains [001] of Co—O octahedra sharing one edge with each other. These chains are linked together by alternating SO4 tetrahedra and additional Co—O octahedra, thus giving rise to a three-dimensional network of polyhedra. There is no similarity to the well known layer structures of most hydroxide salts of divalent metals. The SO4 tetrahedra are regular while the Co—O octahedra show considerable distortion. The water molecule is coordinated to one Co atom and bonded to sulfate oxygen by two weak hydrogen bridges.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19710540613
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