Thio derivatives of β-Diketones and their metal chelates. XVII. Mass spectra of iron(III) and ruthenium(III) chelates of some fluorinated Monothio-β-diketones

Abstract

The mass spectra of the iron(111) and rhodium(111) chelates of the fluorinated monothio-β-diketones RC(SH)=CHCOCF₃ (R = Ph,p-MeC₆H₄, 2-thienyl) have been obtained. Whereas the ruthenium(111) chelates give a peak for the molecular ion, the iron(111) chelates do not, due to thermal degradation to the iron(11) complex Fe(RCS=CHCOCF₃)₂ which then undergoes reactions in the mass spectrometer. Fluorine migration occurs with two of the iron chelates but not with the ruthenium chelates. Mechanisms are proposed for the reactions of the ruthenium chelates.