Abstract
AbstractThe behaviour under electron impact of six 1,1‐bis(benzenesulphonyl)cyclioalkanes and of 1‐phenyl‐1‐(benzensesulphaonyl)cyclopropane has been studied in detail with the aid of exact mass measurements, linked scans for metastable ion analysis, collisional spectroscopy and kinetic energy release measurements. The molecular ions of these compounds undergo a sulphone‐sulphinate rearrangement with alkyl group migration on oxygen, in analogy with what is found for simple monosulphones and, in general, their fragmentation resembles that of mono‐sulphonyl compounds. Loss of SO2 from the molecular ion is observed for all substrates, but only in the case of 1, 1‐bis(benzenesulphonyl)cyclopropane is this followed by loss of the second SO2 unit; the first loss of SO2 is probably accompanied by rearrangement since the fragmentation pattern of [M − SO2]+˙ ions from this compound is different than that of the isobaric molecular ions of 1‐phenyl‐1‐(benzenesulphonyl)cyclopropane.
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