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Mass spectrometry in stereochemical problems. 6 — The case of mono and di-substituted norbornanes

✍ Scribed by O. Curcuruto; D. Favrctto; P. Traldi; D. Ajo; C. Cativiela; J. A. Mayoral; M. P. Lorez; J. M. Fraile; J. I. Garcia

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
455 KB
Volume
26
Category
Article
ISSN
1076-5174

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✦ Synopsis

The mass spectrometric hehaviour of pairs of stereoisomeric moo* and &-substituted norbornanes, namely bicyclo [ 2.2.1 1 heptane-&ndo-and -exo-carboxylic acid, methyl bicyclo [ 2.2.1 1 heptane->endo-and -emcarboxylate, &xo-acetamidobicyclo [ 2.2.1 I heptaoe-2-endo-and Zendu-acetamidobicyclo 12.2.1 1 heptaoe-2-exocarboxylic acid and methyl 2-exo-acetamidobicyclo [ 2.2.1 1 heptane-2-endo-and Zendo-acetamido-bicycloI2.2.11 heptane-2-exo-carboxylate was studied in detail with particular emphasis on characterization of the stereoisomers. The fragmentation patterns, studied with the aid of mass-analysed ion kinetic energy spectrometry, were supported by semi-empirical M W F C calculations, performed using the AM1 method included in the AMPAC program.

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