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Characterization of ionized heterocyclic carbenes by ion‐molecule reactions
Author(s) -
Gerbaux Pascal,
BarbieuxFlammang Monique,
Van Haverbeke Yves,
Flammang Robert
Publication year - 1999
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(19990915)13:17<1707::aid-rcm701>3.0.co;2-0
Subject(s) - chemistry , thiazole , mass spectrometry , adduct , ion , molecule , imidazole , pyridine , photochemistry , mass spectrum , quadrupole mass analyzer , ionization , electrospray ionization , medicinal chemistry , stereochemistry , organic chemistry , chromatography
1,2‐Hydrogen shift isomers of ionized pyridine, thiazole and imidazole are readily characterized by the study of their associative ion‐molecule reactions with dimethyl disulfide in the quadrupole collision cell of a new hybrid sector‐quadrupole‐sector mass spectrometer. Efficient trapping reactions of CH 3 S · radicals are indeed observed and the actual structure of the adduct [M + CH 3 S] + ions is clearly indicated by their high‐energy collisional activation mass spectra. These trapping reactions are not observed for the ‘conventional’ pyridine, thiazole and imidazole molecular ions, which only react by charge exchange producing m/z 94, [CH 3 SSCH 3 ] ·+ , ions. Copyright © 1999 John Wiley & Sons, Ltd.