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

Ghesquière Denis | Zendy; Chachaty Claude | Zendy

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

Author(s) -

Ghesquière Denis,

Chachaty Claude

Publication year - 1977

Publication title -

organic magnetic resonance

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0030-4921

DOI - 10.1002/mrc.1270090704

Subject(s) - relaxation (psychology) , methylene , coupling constant , chemistry , coupling (piping) , nuclear magnetic resonance , rotation (mathematics) , internal rotation , analytical chemistry (journal) , crystallography , computational chemistry , atomic physics , physics , materials science , medicinal chemistry , organic chemistry , quantum mechanics , psychology , social psychology , mechanical engineering , geometry , mathematics , engineering , metallurgy

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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