ISSN:
0030-4921
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Restricted rotation around the C—C bond in the O=C—C=C—N system is responsible of the s-cis and s-trans conformers as shown by the NMR spectra of vinylogous amides (CH3)2N—CH=CH—CO—R. Substituent effect (nature of R) is discussed in terms of conformational equilibrium. Theoretical line shapes have been computed and fit reasonably well with the experimental spectra; activation functions were also derived.
Notes:
L'effet de la nature du substituant R sur l'équilibre conformationnel s-cis-s-trans est examiné dans la série (CH3)2N—CH=CH—CO—R. L'utilisation d'un programme de calcul des courbes théoriques de l'échange permet la détermination des paramètres d'activation ΔH* et ΔS*.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1270020603
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