Letter | Published:

Chain Structure of the Cyclopentadienils of Monovalent Indium and Thallium

Naturevolume 199pages10871089 (1963) | Download Citation



THE cyclopentadienils of monovalent indium and thallium have been prepared by E. O. Fischer et al.1,2. The In-C5H5 is very sensitive to oxidation and must be handled in complete absence of air; the Tl-C5H5 is more stable and its decomposition follows slowly. The stoichiometric convexion 1/1 between metal and C5H5 has been interpreted by E. O. Fischer2 as a ‘half sandwich’ structure with transfer of π electrons from the aromatic ring to the metal. On the other hand, F. A. Cotton and L. Reynolds3 believe the complex to be ionic, on the basis of molecular orbital treatment.

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  1. 1

    Fischer, E. O., Angew. Chem., 69, 207 (1957).

  2. 2

    Fischer, E. O., and Hofmann, H. P., Angew. Chem., 69, 639 (1957).

  3. 3

    Cotton, F. A., and Reynolds, L. T., J. Amer. Chem. Soc., 80, 269 (1958).

  4. 4

    Tyler, J. K., Cox, A. P., and Sheridan, J., Nature, 183, 1182 (1959).

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  1. Centro di Strutturistica Chimica del Consiglio Nazionale delle Ricerche, Padova, Italy



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