Hydrogen rearrangement in the mass spectra of (E)‐1‐alkylsulfonyl‐2‐phenylethenes

Abstract
A novel McLafferty‐type rearrangement has been found to be the most facile fragmentation of (E)‐1‐alkylsulfonyl‐2‐phenylethenes and the migratory aptitudes for different kinds of hydrogen involved has been qualitatively estimated as benzylic ∼tertiary>secondary>primary.
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