Abstract
Experimental values of the NMR spin-lattice relaxation time (T 1) of o-aminobenzoic acid, p-aminobenzoic acid, o-chlorobenzoic acid, p-chlorobenzoic acid and 2,4-dinitrobenzoic acid and mutual viscosity (η12) of o-chlorobenzoic acid, m-chlorobenzoic acid and p-chlorobenzoic acid have been reported. The experimental values of T 1 have been correlated with the calculated value of T 1 obtained using different equations of dielectric relaxation time (τ). It is concluded from this comparative study that Murty's equation is a better representation of the dielectric relaxation phenomenon. It is also concluded that the mutual viscosity (η12) is a better substitute for the resistance to the rotation of the individual solute molecule.
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