Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Theoretical and Physical
Correlation of the Mutual Viscosity and the NMR Spin-Lattice Relaxation Time in Several Substituted Benzoic Acids
Anupam SinghAjay Kumar SinghNand Kumar Mehrotra
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2004 Volume 77 Issue 4 Pages 661-665


The present communication reports on the experimental values of the mutual viscosity (η12) and NMR spin-lattice time (T1) of o-nitrobenzoic acid, m-nitrobenzoic acid, p-nitrobenzoic acid, o-hydroxybenzoic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, and m-chlorobenzoic acid. The small difference between the values of η12 and η1 suggests that the basic model of the dielectric relaxation process does not suffer any major changes even when η12 is used instead of η1. The experimental values of the NMR spin-lattice relaxation time (T1) have been correlated with the calculated values of T1 obtained using various equations of the dielectric relaxation time (τ). It has been concluded that the equations of Writz and Murty are better representations of the dielectric relaxation phenomenon.

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© 2004 The Chemical Society of Japan
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