A study of the character of molecular rotation of nitroxyl radicals in liquids by ESR and dielectric relaxation methods

The possibility of combined application of ESR and dielectric relaxation methods in determining the character of molecular rotation of organic nitroxyl radicals in nonpolar liquids is studied for solutions of 2,2,6,6-tetramethyl-piperidine-N-oxide in decaline. Comparison of the two correlation times for rapid radical rotation obtained by both methods provides evidence for an essentially jump-like rotation of this radical.