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Characterization of coupling constants to nitrogen. Carbon-13 chemical shifts and carbon–nitrogen coupling constants of substituted benzaldoximes

✍ Scribed by Ann Danoff; Marcia Franzen-Sieveking; Robert L. Lichter; Samuel N. Y. Fanso-Free

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 409 KB
Volume: 12
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270120208

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✦ Synopsis

Abstract

Carbon‐13 chemical shifts and ^13^C−^15^N coupling constants of substituted benzaldoximes and of two non‐aromatic oximes have been determined. The coupling constants display little variation as a function of the nature or position of substitution, which suggests that perturbations in the π electron distribution have little effect. The values are compared with the markedly different ones reported for mesitaldoxime, and, in conjunction with the observed solvent effects, are discussed within the Schulman‐Venanzi framework for assessing the role of the lone‐pair.

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