A New Assisted Reaction in the Photodecomposition Reaction of Dibenzoyl Peroxide

Article abstract of DOI:10.1246/bcsj.53.3059

2,2'-, 2,3'-, and 3,3'-Dimethylbiphenyls were found in the photodecomposition reaction of dibenzoyl peroxide using toluene as solvent.We carried out the experiments to study the external magnetic field, oxygen scavenging, and excitation light intensity effects on their yields.It is concluded that they are produced through the dimerization of (benzoyloxy)methylcyclohexadienyl radicals.This is a new case of the assisted reaction by benzoyloxyl radical.The yields of dimethylbiphenyls were found to be affected remarkably by the small variation of the concentration of benzoyloxyl radical through the three experiments.