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Dynamic NMR: Field dependence of the coalescence temperature and temperature dependence of T 2 Relaxation times in N , N ‐dimethyltrichloroacetamide
Author(s) -
Dimitrov V. S.,
Ladd J. A.
Publication year - 1985
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1260230709
Subject(s) - chemistry , coalescence (physics) , relaxation (psychology) , amide , moiety , field dependence , analytical chemistry (journal) , stereochemistry , magnetic field , organic chemistry , physics , psychology , social psychology , quantum mechanics , astrobiology
The field dependence of the 1 H and 13 C coalescence temperatures in N,N ‐dimethyltrichloroacetamide has been used to determine the most reliable activation parameters for internal rotation of the amide moiety. The results were found to be in excellent agreement with those obtained earlier by the double‐fitting procedure and demonstrate its validity. Direct measurements of the T 2 relaxation times of the methyl protons show that T 2 depends exponentially on temperature.