Electron spin resonance studies of several anion radicals of nitro‐substituted thioacylpiperidines and morpholines

Abstract

The radical anions of rn-and p nitro-substituted derivatives of several classes of N-(thioacy1)-piperidnes and morpholines have been studied by ESR spectroscopy. The anion radicals were found to be centred on the nitro group, and the distribution of the unpaired electron was found to be dependent on the extent of conjugation between the thiocarbonyl group and the aromatic moiety of the molecule. The hfs constants were discussed in terms of the spin densities calculated by the McLachlan procedure.