Negative-ion mass spectra of arenesulfonyl chlorides

The negative-ion mass spectrum of p-toluenesulfonyl chloride, 127d, has been reported48. The molecular anion gave a peak of low intensity and fragmented by loss of 

C7H7 as major channel and by loss of a chlorine atom as minor process. However, the base peak was represented by the chloride anion, as commonly observed in the negative-ion spectra of halo compounds. 

The CAD MIKE spectra of [ArS02] ions deriving from methyl-deuteriated 127d and from unlabelled p-toluene-iV-butylsulfonamide (103d) displayed the same decomposition pattern and the expected mass shifts83, pointing to the same structure, or mixture of structures. 

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