Fragmentation and rearrangement processes in the mass spectra of perhalogeno-aromatic compounds. Part III. Phenyl and pentafluorophenyl derivatives of Group V

Abstract

The mass spectra of the compounds (C₆F₅)_{3 –n}MPh_n(n= 0–3; M = P and As), Ph₃Sb, PhSb(C₆F₅)₂, and (C₆F₅)₃Sb have been studied. The basic features of the spectra of each type of compound are reported and correlated with the nature of the central atom, and compared with the analogous compounds for the Group IV derivatives where these have been studied. In general, there are few similarities between the mass spectra of Group IV and Group V derivatives. The fluorine-containing compounds exhibit characteristic migrations of fluorine to the central atom to give an increase in MF⁺, MF₂⁺, and RMF⁺(R = C₆H₅ or C₆F₅) ions on descending the group.