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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 2438-2451 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Basic Cluster Reactions: Opening and Partial Fragmentation of Tetranuclear Clusters by COThe influence of CO on 16 mixed tetranuclear clusters of the general type M4(μ3-E(μ2-AsMe2) with M = Co, Fe, Ru, Mo, W, and E = S, PR, CR is reported. In all cases fragmentation with formation of trinuclear clusters occurs at slightly elevated pressures, during which a Co - As unit is normally eliminated. At normal pressure intermediates are observed in 7 cases, 4 of which can be isolated. Crystal structure analysis of the intermediate FeCo2MoSAsMe2Cp(CO)10 (8a) has shown that two metal-metal bonds are opened upon addition of CO with formation of the new EM3(μ-AsM) cluster framework. Under vacuum the intermediates are reconverted to the starting clusters with elimination of CO.
    Notes: Bei der Einwirkung von CO auf 16 Hetero-Vierkerncluster des allgemeinen Typs M4(μ3-E)(μ2-AsMe2) mit M = Co, Fe, Ru, Mo, W und E = S, PR, CR tritt in allen Fällen unter geringem Überdruck Abbau zu Dreikernclustern ein, wobei in der Regel eine Co - As-Einheit abgespalten wird. Bei Normaldruck werden in 7 Fällen Zwischenstufen beobachtet, die in 4 Fällen auch isolierbar sind. Durch Kristallstrukturanalyse der Zwischenstufe FeCo2MoSAsMe2Cpt(CO)10 (8a) wird belegt, daß durch Addition von CO zwei Metall-Metall-Bindungen geöffnet werden, wodurch das neuartige EM3(μ-AsM)-Clustergerüst entsteht. Im Vakuum wandeln sich die Zwischenstufen unter Abspaltung von CO wieder in die Ausgangscluster zurück.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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