Electron nuclear double resonance and electron spin resonance studies of anion-radicals derived from p-benzoquinone

Abstract

Solutions of p-benzoquinone and quinol in alkaline propan-2-ol and [²H₈]propan-2-ol have been studied using e.s.r. and ENDOR. Four secondary radicals, anions of quinones formed by reaction of the solvent with the substrate, have been identified. Proton hyperfine coupling constants for the radical-anions of 3-alkoxy-2,6-dimethyl-p-benzoquinones, formed from 2,6-dimethyl-p-benzoquinone in alkaline methanol, and propan-2-ol, are reported.