The reactions of dibenzoyl peroxide (BPO) with diethylamine (DEA) and diphenylamine (DPA) have been studied by means of an ESR technique combined with spin-trapping. In the case of the DEA/BPO system, diethylnitroxide was formed, while for the DPA/BPO system diphenylaminyl was detected. Three kinds of traps (N-t-benzylidene-t-butylamine N-oxide, 2-methyl-2-nitrosopropane, and 2,4,6-tri-t-butylnitrosobenzene) were used. Different kinds of spin-adducts were formed depending on such conditions as the steric circumstances, radical stabilities and solvent effects. The differences in the reaction mechanisms for these systems are discussed.
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Nishimura et al. (1994) studied this question.
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