A careful analysis of the electron ionization mass spectra of chalcones reveals the presence of [M−15]+· and [M−16]+ ions which, by collision experiments, accurate mass measurements and deuterium labelling have been proved to originate by primary methyl and methane loss respectively. These findings suggest the existence of a population of molecular ions of chalcone exhibiting a structure different from the dibenzocycloheptadienone structure proposed in the literature
An unexpected methyl loss observed in electron ionization of chalcones
FAVRETTO, DONATA;
1998
Abstract
A careful analysis of the electron ionization mass spectra of chalcones reveals the presence of [M−15]+· and [M−16]+ ions which, by collision experiments, accurate mass measurements and deuterium labelling have been proved to originate by primary methyl and methane loss respectively. These findings suggest the existence of a population of molecular ions of chalcone exhibiting a structure different from the dibenzocycloheptadienone structure proposed in the literature
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