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Study of molecular motions and 14N quadrupolar coupling in 1,3- and 1,4- diethylpyridinium bromides using 13C and 14N relaxation time measurements

✍ Scribed by Denis Ghesquière; Claude Chachaty

Publisher: John Wiley and Sons
Year: 1977
Tongue: English
Weight: 218 KB
Volume: 9
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270090704

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✦ Synopsis

Abstract

The internal and overall motions of 1,3‐ and 1,4‐diethylpyridinium bromides have been studied by ^13^C relaxation. The enthalpies of activation for the rotation of the ethyl groups in positions 1 and 3 are deduced from the temperature dependence of the T~1~ values of the methylene and methine carbons. The ^14^N quadrupolar relaxation time, T~q~, together with ^13^C relaxation data provide an estimate of the ^14^N quadrupolar coupling constants.

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