Synthesis, Structure, and Bonding of the Cation [{(C6H5)3PAu}5C]

Authors

  • Dipl.-Chem. Franz Scherbaum,

    1. Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching (FRG)
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  • Dipl.-Chem. Andreas Grohmann,

    1. Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching (FRG)
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    • X-ray structure analysis

  • Dr. Gerhard Müller,

    1. Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching (FRG)
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    • X-ray structure analysis

  • Prof. Dr. Hubert Schmidbaur

    Corresponding author
    1. Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching (FRG)
    • Anorganisch-chemisches Institut der Technischen Universität München, Lichtenbergstrasse 4, D-8046 Garching (FRG)
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  • This work was supported by the Deutsche Forschungsgemeinschaft (Leibniz-Programm), the Fonds der Chemischen Industrie, and Degussa AG. We thank J. Riede for preparing the crystallographic data set.

Abstract

original image

An Au[BOND]C bond order of 0.8 characterizes the pentaauriomethyl cation 1, so that the central carbon atom cannot be regarded as hypervalent. Compound 1 is formed from CH2[B(OMe)2]2 and [Ph3PAuCl] in the presence of CsF as BFmath image salt in 84% yield. The trigonal-bipyramidal coordination of the carbon center is slightly distorted. This may be due to a reduction in energy upon lowering the symmetry or to ligand–ligand repulsion or packing effects.

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