## Abstract The ^13^C NMR spectra were determined and signals assigned to the various carbons of veratridine and cevadine.
Carbon-13 nuclear magnetic resonance spectra of aminocyclohexanecarbonitriles and comparison with phencyclidine analogues
✍ Scribed by Keith Bailey; Donald Legault
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 395 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^13^C NMR spectra of 20 aminocycloalkanecarbonitriles were determined in CDCl~3~. The signals were assigned by a self‐consistent analysis of chemical shift data and comparison with results from phencyclidine analogues. The results were interpreted in terms of changes in the amine (primary, secondary, tertiary) and the cycloakane (cyclohexane vs cyclopentane) moieties and their bulk. Changes in the conformational equilibria of the cyclohexane series are suggested by comparisons between data from the carbonitrile and phencyclidine series. The spectra are suitable for corroborative authentication of reference materials and the identification of unknowns.
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REFERENCE DATA causes the electron density to be comparatively lower at C-3 and C-5 than at C-2 and C-4, so that the former signals resonate at lower fields. Distinction between the signals of the C-2/C-4 and C-3/C-5 pairs was achieved by comparing the C-H coupling patterns of 5 and 1. Compounds 1,