EVIDENCE OF THE SINGLET RADICAL PAIR PRECURSOR IN THE PHOTOLYTIC GENERATION OF 1,4-DIMETHYLPYRIDINYL RADICAL FROM ITS DIMER.

Article abstract of DOI:10.1246/cl.1984.903

Time-resolved ESR spectra of the 1,4-dimethylpyridinyl radical were observed after the photolysis of its dimer with a N2 laser.Since the transient ESR spectra exhibited the A/E polarization, singlet radical pair is proposed as the precursor of the present radical on the basis of simple sign rule.