Phenyl disulphide radicals

Homolysis, Oxidation, and Reduction.—Photolysis converts 2-nitrosoimino-3-phenyl-2,3-dihydrobenzothiazole (48 R = Ph), with loss of nitric oxide, into bis[o-(N-phenylcyanamino)phenyl] disulphide in 74% yield. Under varied conditions, 2-imino-3-phenyl-2,3-dihydrobenzothiazole is also formed (20%). The relative rates of the photolysis of (48) were measured in a number of different solvents. An interpretation of the results in terms of a free-radical mechanism involving the biradical (49) was proposed."... 

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