NMR spin-lattice relaxation time and activation energy of some substituted phenols

Abstract

The experimental values of NMR spin-lattice relaxation time (<i style="">T</i>₁) of <i style="">m</i>-aminophenol, <i style="">p</i>-aminophenol, <i style="">o</i>-nitrophenol, resorcinol and <i style="">p</i>-chlorophenol have been reported. The values of activation energy (∆<i style="">E</i>_A) obtained using dielectric relaxation time, have been correlated with calculated values of ∆<i style="">E</i>_A obtained using Arrhenius equation of NMR spin-lattice relaxation time (<i style="">T</i>₁) for these compounds. A correlation between the experimental values of <i style="">T</i>₁ and its calculated values obtained using different equations of dielectric relaxation time (<img src='/image/spc_char/tow.gif' border=0> ) has been established.