Estudos de R. M. N. de 1H e de 13C de cidoescanonas a-heterossubstituidas

AUTOR(ES)

Ernani Abicht Basso

DATA DE PUBLICAÇÃO

1991

RESUMO

The aim of the present work has been the study of the conformational equilibrium of some a-monosubstituted cyclohexanones (2 to 11) by Hydrogen-1 and Carbon-13 nuclear magnetic resonance spectroscopy, and the effect of the several substituents in the Carbon-13 chemical shifts of the carbon atoms of the cyclohexanone ring has also been circumstantially investigated. A correlation between Carbon-13 and Oxygen-17 chemical shifts was briefly discussed. Most of the required compounds (1 to 22) were synthesized in our laboratory. A bibliographic survey on the conformational equilibria and on Carbon-13 n.m.r. spectroscopy studies of related compounds was also included for a comparison with the results here presented. The chemical shifts assignment, both Carbon-13 as Hydrogen-1 signals, was performed by the usual methods and checked, whenever it seemed necessary, by APT and DEPT (1D) and HETCOR (2D) experiments. The conformational equilibria for alI studied cyclohexanones were determined by the Eliel s method, which has lead to highly satisfactory results.

ASSUNTO(S)

carbono - compostos compostos organicos

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