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Characterization of ionized heterocyclic carbenes by ion-molecule reactions

✍ Scribed by Pascal Gerbaux; Monique Barbieux-Flammang; Yves Van Haverbeke; Robert Flammang

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 69 KB
Volume: 13
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19990915)13:17<1707::aid-rcm701>3.0.co;2-0

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✦ Synopsis

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.

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