Systematic Preparation and Characterization of Pentahaptocyclopentadienylcopper(I) Compounds

F. A. Cotton, T. J. Marks

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82 Scopus citations


A convenient and general method for the preparation of (h5-C5H5)(L)Cu compounds is described and illustrated for compounds with L = (C2H5)3P, (C4H9)4P, (C6H5)3P, (CH3O)3P, and CH3NC. The method involves reaction of the appropriate (LCuI)4 or (LCuBr)4 compound with C5H5Tl. The compounds have all been characterized by analyses, pmr, infrared and mass spectra, and, for L = (C6H5)3P and (C2H5)3P, by X-ray diffraction as pentahaptocyclopentadienyl compounds. The compound (h5-C5H5)(CO)Cu has also been prepared by reaction of CuCl, C5H5Tl, and CO in pentane at 0°. It has a very high CO stretching frequency (2093 cm–1) and decomposes rapidly at room temperature.

Original languageEnglish (US)
Pages (from-to)5114-5117
Number of pages4
JournalJournal of the American Chemical Society
Issue number17
StatePublished - Aug 1 1970

ASJC Scopus subject areas

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


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