Fragmentation and rearrangement processes in the mass spectra of perhalogenoaromatic compounds. XII‐pentafluorophenyl derivatives af phosphorus (V) halides

Abstract

AbstractThe Mass spectral fragmentation processes for a number of alkyl and aryl subtituted phosphinyl and phosphonyllk halides and their thio analogs are discussed with respect to two intramolecular rearrangment processes. The first is aryl fluorine transfer to phosphorus and the second concerns a rearrangement depicted as follows, i.e. a reverse Arbuzov reaction RR′XPS→RXPSR′. Both pathways are supported by evidence obtained form metastable ions and mass analyzed ion kinentic energay spectra. The previously observed phenomenon of subtituent coupling is also describedc where ita occurs in the phosphinyl compounds. The mass spectra of a number of mixed fluoro‐pebtafkuorophenyl phosphorances are also discussed.