Doubly Lithiated Oligosilanes: Synthesis and Structure of the First Vicinal Dilithiodisilane

Authors

  • Dr. Johannes Belzner,

    Corresponding author
    1. Institut für Organische Chemie der Universität, Tammannstrasse 2, D-37077 Göttingen (FRG) Telefax: Int. code + (551)39-9475
    • Institut für Organische Chemie der Universität Tammannstrasse 2, D-37077 Göttingen (FRG) Telefax: Int. code + (551)39-9475
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  • Dipl.-Chem. Uwe Dehnert,

    1. Institut für Organische Chemie der Universität, Tammannstrasse 2, D-37077 Göttingen (FRG) Telefax: Int. code + (551)39-9475
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  • Priv.-Doz. Dr. Dietmar Stalke

    Corresponding author
    1. Institut für Anorganische Chemie der Universität, Tammannstrasse 4, D-37077 Göttingen (FRG) Telefax: Int. code + (551)39-2582
    • Institut für Anorganische Chemie der Universität Tammannstrasse 4, D-37077 Göttingen (FRG) Telefax: Int. code + (551)39-2582
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  • This work was supported by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie. We thank Prof. M. Rabinovitz for helpful discussions and R. Machinek, Dr. G. Elter, and W. Zolke for assistance with the NMR spectroscopic studies.

Abstract

original image

Reaction of cyclotrisilane 1 with lithium yields, depending on the reaction conditions, either the trisilane 2 lithiated at the terminal positions or the vicinal dilithiodisilane 3. These silanes are the first examples of this class of compounds and the first to be characterized by X-ray structure analysis. Ar = 2-(Me2NCH2)C6H4.

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