Mass spectrometry in structural and stereochemical problems—CXXII: Possible operation of tautomerism before and after electron-impact induced fragmentation of …

JK MacLeod, JB Thomson, C Djerassi

Index: MacLeod,J.K. et al. Tetrahedron, 1967 , vol. 23, p. 2095 - 2103

Full Text: HTML

Citation Number: 24

Abstract

A study of the double McLafferty transfer process in the mass spectra of two cyclic ketones and a substituted malonic ester, at both high and low electron energies, has shown that little tautomerism of the intermediate single McLafferty enolate ion occurs in these cases. In addition, tautomerism of the molecular ion in a number of carbonyl derivatives appears not to be a prerequisite for γ-cleavage in the mass spectra of these compounds.