Mass Spectra of Organometallic Compounds. V. Some Π-Cyclopentadienyl Derivatives Not Containing Carbonyl Groups

Abstract

The mass spectra of the following compounds are reported: (1) the π-eycloheptatrienyl derivatives C₅H₅MC₇H₇, (M = V and Cr); (2) the π-pyrrolyl derivative C₅H₅FeC₄H₄N; (3) the ethylene derivative C₅H₅Rh(C₂H₄)₂; (4) the 1,5-cyclooctadiene derivatives C₅H₆MC₈H₁₂ (M = Rh or Ir); (5) the trimethylplatinum derivative (CH₃)₃PtC₅H₅; (6) the nickel and palladium complexes C₃H₅PdC₅H₅, C₁₀H₁₂OCH₃PdC₅H₅, and C₅H₅NiC₁₃H₁₇. The following features of particular interest were observed: (1) evidence for elimination of neutral C₆H₆ fragments from the C₅H₅-MC₇H₇ compounds; (2) evidence for elimination of C₂H₂, HCN, C₂H₂N, C₄H₄N, and Fe fragments from the parent ion of C₅H₅FeC₄H₄N; (3) evidence for stepwise elimination of ethylene ligands from C₆H₅Rh(C₂H₄)₂; (4) evidence for relatively weak metal–π-cyclopentadienyl bonds in the nickel and palladium derivatives.

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