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The effect of molecular geometry on the electron-impact-induced fragmentation of 3,4-diethylmuconates

✍ Scribed by E. Gil-Av; J. H. Leftin; A. Mandelbaum; S. Weinstein

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
249 KB
Volume
4
Category
Article
ISSN
1076-5174

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✦ Synopsis

The isomeric 3,4-diethylmuconic acid dimethyl esters behave differently under electronimpact. Methanol elimination from the molecular ion is one of the most important processes in the trans, trum diester. In the cis, cis and cis, trans isomers, however, the loss of a methoxyI radical from the molecular ion occurs to a much greater extent than elimination of methanol. This distinctive behaviour is interpreted in terms of different distances between the methoxy groups and the allylic hydrogen atoms in the geometrical isomers. Other differences in the mass spectra of the isomers are reported and discussed.

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