Thermal decomposition of benzoyl peroxide in the presence of bisaryliminosulphur derivatives (ArN:S:NAr) affords the corresponding azobenzene (ArN:NAr) and diphenyl disulphide. It is suggested that the products originate from a bridged thiadiazolidinyl radical (8) formed by attack of the phenyl radical at sulphur followed by intramolecular cyclization.
G. De Luca, G. Renzi, R. Cipollini and A. Pizzabiocca, J. Chem. Soc., Perkin Trans. 1, 1977, 2022 DOI: 10.1039/P19770002022
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