Mass-spectrometric studies. I. Benzo[b]thiophen, some alkyl and aryl derivatives, and the 1,1-dioxide and 2,3-dihydro-1,1-dioxide

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Abstract
The high-resolution mass spectra of benzo[b]thiophen, some alkyl and aryl derivatives, and the sulphone and 2,3-dihydrosulphone have been obtained; compositions of all significant ions in the spectra have been determined. Fragmentations of the unoxidized compounds are dominated by losses of C2H2 and CS units, while the sulphones undergo initial isomerization to cyclic sulphinates followed by expulsion of SO and fragments containing a C-O bond. Structures have been suggested for most of the ions observed.

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