Mass spectral studies of organoboron compounds. Part I. Facility of hydrocarbon ion rearrangements in some phenylborolans under electron impact

Abstract

The mass spectra of phenyldioxa-, phenyloxathia-, and phenyldithia-borolans have been examined and a full analysis is reported. The formation of hydrocarbon ions, by electron impact-induced rearrangement, from these heterocycles is rationalised in terms of the relative bond-energies between the atoms in the heterocyclic ring.