Study of NMR spin-lattice relaxation mechanism and mutual viscosity in some substituted alcohols

Abstract

The present communication reports the experimental values of NMR spin-lattice relaxation time ( T 1) and dielectric relaxation time ( τ) of α-naphthol, β-naphthol, o-aminophenol, benzyl alcohol, phenol, pyrogallol, catechol, and the experimental values of mutual viscosity η 12 of o-aminophenol, m-aminophenol, and p-aminophenol. The correlation of mutual viscosity with dielectric relaxation time ( τ) of the compounds investigated leads to the conclusion that mutual viscosity is a better representation of the resistance to the rotation of the individual solute molecule. The experimental values of T 1 have been correlated with calculated values of T 1 obtained using various equations of dielectric relaxation time. It has been concluded that Murty's equation is a better substitute of dielectric relaxation phenomenon.