Concepedia

Abstract

A solution ESR spectral investigation on 2-(benzimidazol-2-yl)-4,4,5,5-tetramethyl-1 H -imidazoline-1-oxyl-3-oxide (=BIm-NN) and a magnetic susceptibility measurement of its −(N)H deuterated sample (BIm-NN-d 1 ) were carried out. A moderate amount of spin density was observed in benzimidazole ring bearing a hydrogen-bonding site. There was no appreciable difference in the temperature dependence of magnetic susceptibility between BIm-NN and BIm-NN-d 1 .