Aryl-substituted fluorophosphazenes. Part VII. Mass spectra of some aryl-substituted fluorocyclotriphosphazenes

Abstract

The mass spectral data for a series of aryl substituted fluorocyclotriphosphazenes, P₃N₃F_nAr_{6 –n}(n= 2, 4, or 5; Ar = C₆H₅, C₆D₅, or p-C₆H₄NMe₂), are reported and discussed. Successive loss of aryl groups, leaving the phosphazene ring intact is the major fragmentation process for the geminal derivatives while linear ion formation is the most significant process for the non-geminal isomers. Intensity differences are noted between the spectra of the cis and trans 1,3-P₃N₃F₄(C₆H₅)₂ species. The nature of the aryl group has a pronounced effect on the fragmentation processes. A variety of fragmentation and rearrangement processes are discussed in relation to the known structural properties and solution chemistry of the cyclotriphosphazenes.