Journal of the Chemical Society Dalton Transactions · 1977 · 16 citations · 0 references
Natural SciencesChemistryOrganometallic ChemistryRadiobiologySpectroscopyPhotocatalysisPhotochemical KineticsPhotochemistryRadiation ChemistryRadical ReactionsReaction MechanismsPhotochemical Bond CleavagePhotochemical Reaction KineticsPhotochemical Reaction MechanismsPhotochemical ReactionsPhotophysical MechanismsRadiation-induced Reaction MechanismsRadical Chain MechanismsRadical Reaction Mechanisms
Tertiary phosphines, PR13, react with organic diselenides, Se2R22, under u.v. radiation to produce PR13Se and SeR22. The reaction rates decrease in the orders R13, = Me2Ph > MePh2 > Ph3 and R2= CH2Ph > Et > Me > Ph. A radical-chain mechanism appears to operate via SeR2˙ and PR13(SeR2)˙. Although cleavage of Se–C bonds may be involved in the u.v. irradiation of Se2R22, cleavage of Se–Se bonds seems more important in these reactions, even for R2= CH2Ph.