K. Bancroft, L. H. Guindi, A. F. Temple
Dec 1, 1972
Citations
0
Influential Citations
3
Citations
Journal
Journal of Mass Spectrometry
Abstract
Although the behaviour of 1H, 2H-2,1,3-benzothiadiazoline 2,2-dioxide is similar to that of sulphoxides in the mass spectrometer in losing a molecule of SO2, the 1,3-dimethyl derivative loses the radical SO2H. In addition the radical CH3SO2 is lost in a one step process that must involve a methyl migration. The radical SO2H is also lost from 2,1,3-benzothiadiazine 2,2-dioxides methylated in the 3-position and the hydrogen involved is shown to originate from this methyl group by deuterium labelling. The mass spectra of other 2,1,3-benzothiadiazine 2,2-dioxides are also discussed.