Fragmentation and Rearrangement Processes in the Mass Spectra of Perhalogenoaromatic Compounds. Part IX. Pentafluorophenol and Pentafluorothiophenol Derivatives of Group IV

Abstract

The mass spectra of R 3 MSC 6 F 5 and R 3 MOC 6 F 5 (R = CH 3 or C 6 H 5 ; M = Si, Ge, Sn) are reported and compared with the corresponding pentafluorophenyl derivatives. The sulfur and oxygen compounds show fewer rearrangements leading to the formation of metal fluorides than do simple C 6 F 5 derivatives. The ions R 3 M + are usually observed as the base peaks. Ions containing Sn—S appear more stable than Sn—O species, while the reverse seems true for silicon.