Abstract
Abstract The reactions of DPPH with azobisiso but yronitrile in ben-zene and in methyl methacry late have been studied. The reactions are complex, and the previously-assumed initi-ator radical-DPPH adduct, l-(4-cyanoisopropylphenyl)-l-phenyl-2-picrylhydrazine, is only one component in a mixture of products which include dip henyl, diphenylamine, l,l-diphenyl-2-picrylhydrazine and aminophenylphenyl-picrylhy drazine derivatives, and nitrile-rich polymeric species. The reactions of DPPH with aliphatic mercaptans are also more complex than previously assumed, and although the corresponding aliphatic disulfides are usually the major products, the reactions apparently do not involve free radical intermediates.
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