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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 399 (1973), S. 43-51 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sulphito Cobalt (III) Ammines. I. Sulphitopentaamminecobalt (III) and Sulphitoaquotetraamminecobalt(III) SaltsBecause of the trans effect of the sulphito group salts containing the cation [CoSO3(NH3)5]+ react with H2O forming [CoSO3H2O(NH3)4]+. In acid medium the conversion is complete. Therefore, sulphitopentaamminecobalt(III) salts have to be prepared and purified in solutions containing free ammonia. Earlier preparation methods not regarding this circumstance lead to tetraammine compounds or to mixture of pentaammine and tetraammine complexes.The preparation and the properties of a number of sulphitopentaammine and sulphito-aquotetraamminecobalt(III) salts are described (see “Inhaltsübersicht”). The light absorption and the IR spectra of the complexes [CoSO3(NH3)5]+ and [CoSO3H2O(NH3)4]+ are reported and discussed.
    Notes: [CoSO3(NH3)5]+-Salze reagieren infolge des trans-Effektes der SO3-Gruppe bereits mit Wasser unter teilweiser Bildung von [CoSO3H2O(NH3)4]+. In saurem Medium ist die Umwandlung vollständig. Zur Darstellung und Reinigung der Sulfitopentammine muß daher stets in ammoniakalischem Medium gearbeitet werden. Ältere Darstellungsvorschriften, in denen dies nicht beachtet wurde, ergeben Tetrammine oder Pentammin-Tetrammin-Gemische.Darstellung und Eigenschaften von [CoSO3(NH3)5]Cl · H2O, [CoSO3(NH3)5]Br · H2O, [CoSO3(NH3)5]J · 1/2 H2O, [CoSO3(NH3)5]ClO4, [CoSO3(NH3)5]2SO4 · 2 H2O und [CoSO3(NH3)5]SCN · H2O werden beschrieben. Ferner werden die bisher nicht erhaltenen Komplexe [CoSO3H2O(NH3)4]Br, [CoSO3H2O(NH3)4]2SO4 und [CoSO3H2O(NH3)4]ClO4 dargestellt. Die Lichtabsorptions- und Schwingungsspektren von [CoSO3(NH3)5]+ und [CoSO3H2O(NH3)4]+ werden angegeben und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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