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

The present communication reports the experimental values of NMR spin-lattice relaxation time (T1) and dielectric relaxation time (τ) of α-naphthol, β-naphthol, o-aminophenol, benzyl alcohol, phenol, pyrogallol, catechol, and the experimental values of mutual viscosity η12 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 T1 have been correlated with calculated values of T1 obtained using various equations of dielectric relaxation time. It has been concluded that Murty's equation is a better substitute of dielectric relaxation phenomenon.