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An unexpected methyl loss observed in electron ionization of chalcones
Author(s) -
Ardanaz C.,
Kavka J.,
Guidugli F. H.,
Favretto D.,
Traldi P.
Publication year - 1998
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19980214)12:3<139::aid-rcm128>3.0.co;2-g
Subject(s) - chemistry , electron ionization , chalcone , deuterium , mass spectrum , ion , ionization , methane , electron , population , mass spectrometry , analytical chemistry (journal) , atomic physics , stereochemistry , organic chemistry , chromatography , nuclear physics , physics , demography , sociology
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. © 1998 John Wiley & Sons, Ltd.