The Effect of the Spin Multiplicity of Sensitizers on the Formation of Free Radical Cage Reaction Product in the Irradiation of Dibenzoyl Peroxide

Decomposition of dibenzoyl peroxide with singlet sensitization gives phenyl benzoate resulting from the cage recombination between a benzoxyl and a phenyl radical as noticeably as with the direct photolysis; on the contrary, the triplet sensitization gives only low yield of phenyl benzoate.