Four-Membered Phosphorus-Nitrogen-Metal Heterocycles with Zwitterionic Structure

Authors

  • Priv.-Doz. Dr. Edgar Niecke,

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    1. Anorganisch-Chemisches Institut der Universität, Tammannstrasse 4, D-3400 Göttingen (Germany)
    • Anorganisch-Chemisches Institut der Universität, Tammannstrasse 4, D-3400 Göttingen (Germany)
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  • Dipl.-Chem. Rainer Kröher,

    1. Anorganisch-Chemisches Institut der Universität, Tammannstrasse 4, D-3400 Göttingen (Germany)
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  • Dr. Siegfried Pohl

    1. Fakultät für Chemie der Universität, Universitätsstrasse, D-4800 Bielefeld 1 (Germany)
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  • Part 14 of Studies on Phosphazenes with Coordination Numbers of 2 and 3.—Part 13: E. Niecke, H. G. Schäfer, Angew. Chem. 89, 817 (1977); Angew. Chem. Int. Ed. Engl. 16, 783 (1977).

Abstract

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Novel cyclic zwitterions of type (1), R[DOUBLE BOND]SiMe3, EXn[DOUBLE BOND]SnCl2, AlCl3, FeCl3, TiCl4, NbCl5 have four-membered rings with positively charged P and negatively charged metal atom. The structure of (1), EXn−1[DOUBLE BOND]TiCl3, was confirmed by X-ray analysis.

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