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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 114 (1981), S. 488-494 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Covalent and Ionic (Pentamethylcyclopentadienyl)tin(II)CompoundsAmong (Pentamethylcyclopentadienyl)tin(II) compounds of the type C5Me5SnX and their unsubstituted analogues C5H5SnX a separation between covalent species C5R5Sn—X and ionic structures C5R5Sn+X- is possible. With their pentagonal-pyramidal C5R5Sn+ cluster ionic compounds contain a very unusual cation. The C5R5Sn+ unit shows electrophilic character, so that ionic products can only be obtained with anions of poor nucleophilic reactivity; with more nucleophilic anions covalent species are formed, which often tend to disproportionation reactions.
    Notes: Bei den (Pentamethylcyclopentadienyl)zinn(II)-Verbindungen vom Typ C5Me5SnX und ihren unsubstituierten Analoga C5H5SnX können kovalente Spezies C5R5Sn—X und ionische Strukturen C5R5Sn+X- unterschieden werden. Letztere besitzen mit dem pentagonal-pyramidalen C5R5Sn+ Cluster ein Kation ungewöhnlicher Struktur. Die C5R5Sn+ Eigenschaften, weshalb nur mit wenig nucleophilen anionen X- ionische Verbindungen gebildet werden; mit stärker nucleophilen Resten X- entstehen kovalente Verbindungen, die häufig zu Disproportionierungsreaktionen neigen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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