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Fragmentation of Collisionally Activated 2-, 4- and 5-Methyl-3-hydroxyphenoxide Anions in the Gas Phase

✍ Scribed by Flechtner, Thomas W.; Winnik, Bozena; Winnik, Witold; Tevesz, Michael J. S.

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 472 KB
Volume: 31
Category: Article
ISSN: 1076-5174
DOI: 10.1002/(sici)1096-9888(199604)31:4<377::aid-jms309>3.0.co;2-4

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✦ Synopsis

Low

-energy collisionally activated dissociation (CAD) of U-deprotonated 2-, 4-and 5-methylresorcinol in the gas phase largely causes fragmentation to form ions analogous to those observed in the CAD spectrum of resorcinol. The anions of the three isomers decompose in processes initiated by the migration of the remaining oxygen-bound hydrogen atom to the adjacent ring carbons. 5-Methylresorcinol also decomposes by the expulsion of the elements of ketene. The mechanisms of these fragmentation processes were studied by the use of both NH, and D,O as deprotonation agents, deuterium labeling of ring carbon atoms and the study of the decomposition pattern of 4,6-dimethyl-2-pyrone.

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