An Infrared Study of the Structures of Cyclopentadienyl Compounds of Copper(I) and Mercury(II)

F. A. Cotton, T. J. Marks

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106 Scopus citations

Abstract

The infrared spectra of the copper(I) compounds (C5H5)CuPR3, R = C2H5, C4H9, and the mercury compounds (C5H5)2Hg and C5H5HgCl have been reinvestigated. Comparisons are made with the spectra of compounds which serve as models for pentahapto- and monohaptocyclopentadienylmetal systems. The following conclusions emerge unequivocally: (1) contrary to the belief which has prevailed since 1956, the copper compounds contain pentahapto (i.e., “sandwich-bonded”) rings, and (2) the mercury compounds contain monohapto (i.e., σ-bonded) rings. The significance of these results is discussed in relation to the physical, chemical, and dynamical properties of the molecules.

Original languageEnglish (US)
Pages (from-to)7281-7285
Number of pages5
JournalJournal of the American Chemical Society
Volume91
Issue number26
DOIs
StatePublished - Dec 1 1969

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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