Kinetics of the Reaction of Vinyl Radical with Molecular Oxygen

Article abstract of DOI:10.1021/j100008a002

The kinetics of the reaction C2H3 + O2 -> products (reaction 1) has been studied at temperatures 299-1005 K and He densities (3-18)E16 molecule cm^-3 using laser photolysis/photoionization mass spectrometry.Rate constants were determined in time-resolved experiments as a function of temperature and bath gas density.The overall rate constant of reaction 1 is independent of pressure within the experimental range and can be described by the Arrhenius expression k₁ = (6.92 +/- 0.17)E-12 exp(120 +/- 12 K)/T) cm³ molecule^-1 s^-1.Experimental results are compared with theoretical predictions, and implications for the mechanism of reaction 1 are discussed.