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Odd-electron molecular ion and loss of toluene in fast atom bombardment mass spectra of some carotenoids

✍ Scribed by Salvatore Caccamese; Domenico Garozzo

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
268 KB
Volume
25
Category
Article
ISSN
1076-5174

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✦ Synopsis

Abstract

Positive‐ion fast atom bombardment (FAB) and B/E linked scan FAB mass spectra of seven carotenoids are reported. In all cases the M ^+Β·^ ions are observed, and the [M + H]^+^ ions are absent in the hydrocarbons and weak in the oxygenated compounds. The usefulness of B/E linked scan FAB mass spectra to distinguish isomers and to attribute the loss of toluene from the M ^+Β·^ to an ionic fragmentation and not to a thermal process is discussed.

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