Abstract
Mass spectra of p-(tolylsulfonyl)diazines(Ar-SO2-C6H4-CH3, I) were examined. The molecular ion (M+) of I seems to undergo the migration to form the rearranged molecular ion of p-tolyl diazinesulfinate(M1) or that of diazinyl p-toluenesulfinate(M2). The general fragmentation patterns of M+, M1+ or M2+ are summarized by some pathways. The principal fragments of I are C7H7+ formulated as the tropylium ion, Ar+ formed by the loss of p-tolylsulfonyl group from M+, C7H7 and ArC7H7+ yeilded by the expulsion of sulfur dioxide from M+. It shows that the principal fragmentation of I proceeds by the pathway having the stable fragment ions.
