[(Cp**CoH)2-μ-{η22-cis-μ-[(C2H5)2Al–CH = CH–Al(C2H5)2]}] and [{Cp*2-C2H4)CoAl(C2H5)}2]: Synthesis and Structure of Unusual Co–Al Cluster Compounds

Authors

  • Priv.-Doz. Dr. Jörg J. Schneider,

    Corresponding author
    1. Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr (FRG)
    Current affiliation:
    1. Institut für Anorganische Chemie der Universität–Gesamthochschule, Universitätsstrasse 5–7, D-45117 Essen (FRG) Telefax: Int. code + (201)183-2402
    • Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr (FRG)
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  • Prof. Dr. Carl Krüger,

    1. Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr (FRG)
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  • Dr. Matthias Nolte,

    1. Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr (FRG)
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  • Dipl.-Chem. Ingo Abraham,

    1. Institut für Physikalische Chemie der Universität Stuttgart
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  • Dr. Teja S. Ertel,

    1. Institut für Physikalische Chemie der Universität Stuttgart
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  • Prof. Dr. Helmut Bertagnolli

    1. Institut für Physikalische Chemie der Universität Stuttgart
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  • We thank one of the reviewers for his valuable comments, the Fonds der Chemischen Industrie for financial support, and the Deutsche Forschungsgemeinschaft (Heisenberg Fellowship to J.J.S.). The single-crystal X-ray structure analyses were carried out by C. K. and M. N., the EXAFS analyses by I. A., T. S. E. and H. B. Abbreviations: Cp* = η5-pentamethylcyclopentadienyl, Cp** = η5-1,2,3,4-tetramethyl-5-ethylcyclopentadienyl.

  • Dedicated to Professor Borislav Bogdanović on the occasion of his 60th birthday

Abstract

original image

How many metal atoms can coordinate to a C[DOUBLE BOND]C unit? The answer for Co–Al clusters 1 (R = Me) and 2 (R = Et), the first η-η22-bridged dialumin-ioethene clusters, is “four”. The complexes are formed in about 30% yield on treatment of [Cp+2-ethene)2Co] (Cp+ = C5Me5, C5Me4Et) with AlEt2H.

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