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Fast-atom bombardment mass spectra of isopropylidene derivatives of glucose and mannose

✍ Scribed by K. P. Madhusudanan; S. Katiyar; S. N. Suryawanshi

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 62 KB
Volume: 13
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19990330)13:6<488::aid-rcm512>3.0.co;2-x

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✦ Synopsis

Abundant [M H] , [M-H] and [M-CH

3 ] ions are observed in the fast-atom bombardment mass spectra of isopropylidene derivatives of glucose and mannose. Formation of abundant [M-H] is attributed to beaminduced processes. The collision-induced dissociation spectra of the [M H] ions of the a-and banomers of the glucose derivatives differ in the abundances of the fragment ions. As expected, marked differences are noticed in the fragmentations of the [M H] and the corresponding [M Li] ions. Lithium cationization induces cleavage of the isopropylidene ring.

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