Photolysis of Methyl Vinyl Ketone at 193.3 nm: Quantum Yield Determinations of Methyl and Vinyl Radicals.

The primary dissociation processes in the photolysis of methyl of methyl vinyl ketone (MVK) at 193.3 nm have been investigated. A quantum yield of close to unity for the formation of both CH 3 and C 2 H 3 radicals has been determined using real-time absorption data in conjunction with gas chromatography analysis of final products. Detailed kinetic modeling of the system indicates a rate constant of (1.5±0.3)×10 -10 cm 3 molecule -1 s -1 for the cross-combination of methyl vinyl radicals