Synthesis and Structure of 1-Aza- and 1-Phospha-2-titanacyclobut-4-enes

Authors

  • Priv.-Doz. Dr. Rüdiger Beckhaus,

    Corresponding author
    1. Institut für Anorganische Chemie der Technische Hochschule Professor-Pirlet-Strasse 1, D-52056 Aachen (FRG) Telefax: Int. code + (241)8888 288
    • Institut für Anorganische Chemie der Technische Hochschule Professor-Pirlet-Strasse 1, D-52056 Aachen (FRG) Telefax: Int. code + (241)8888 288
    Search for more papers by this author
  • Dipl.-Chem. Isabelle Strauß,

    1. Institut für Anorganische Chemie der Technische Hochschule Professor-Pirlet-Strasse 1, D-52056 Aachen (FRG) Telefax: Int. code + (241)8888 288
    Search for more papers by this author
  • Dipl.-Chem. Trixie Wagner

    1. Institut für Anorganische Chemie der Technische Hochschule Professor-Pirlet-Strasse 1, D-52056 Aachen (FRG) Telefax: Int. code + (241)8888 288
    Search for more papers by this author

  • This work was supported by the Deutschen Forschungsgemeinschaft and the Fonds der Chemischen Industrie. We thank Prof. Dr. G. E. Herberich for his continuing interest and Prof. Dr. P. Paetzold for a sample oftBuCP (Technische Hochschule Aachen). Stimulating discussions with Prof. Dr. R. H. Grubbs (California Institute of Technology) are gratefully acknowledged.

  • Dedicated to Professor Peter Paetzold on the occasion of his 60th birthday

Abstract

original image

The reduced electrophilicity of the Ti center resulting from Cp* ligands and sp2 hybridization of the ring-C atoms influences the stability of 1 (X[DOUBLE BOND]N, P) in such a way that 1-aza- and 1-phospha-2-titanacclobut-4-enes could be characterized by X-ray structure analysis for the first time. The metallacycles 1 are formed by trapping the [Cpmath imageTi[DOUBLE BOND]C[DOUBLE BOND]CH2] intermediate with tBuCX (X[DOUBLE BOND]N or P); however, the mechanisms of these reactions differ.

Ancillary