Mass spectra of isomers. Part II. Electron-impact-induced isomerisation of some derivatives of cyclobutane

Abstract

The electron-impact-induced fragmentation of some isomeric derivatives of cyclobutane is interpreted in terms of the formation of a cyclohexene intermediate; the structure of the intermediate is dependent upon the parent cyclobutane. The losses of C₂H₅· and C₃H₆ from the molecular ions are a consequence of the formation of the cyclohexene intermediates.