Fast Atom Bombardment Mass Spectrometry of Arene-Chromium Complexes: Cr(η6-C6-Ph6)2, Cr{η6-PhPh[Cr(CO)3]}2 and Fe(η-C5H4-η6-PhCr(CO)3)n(η-C5H4Ph)2-n (N = 0-2)

Abstract

The fast atom bombardment mass spectra of several high molecular weight η- arene -chromium complexes have been measured and analysed. Interesting features include the observation of loss of C2Ph2 from [Cr(C6Ph6)2]+ to give [Cr(C10Ph10)]+ as the base peak, which appears to be derived from pentaphenylcyclopentadiene; the ready loss of Cr(CO)3 moieties from complexes containing this group; and the formation of ions containing CrFe groups in the spectra of the ferrocene derivatives.