Kinetics of the Reactions of CF2ClO2 Radicals with Nitrogen Dioxide

Article abstract of DOI:10.1021/j100367a036

The kinetics of the reaction of CF2ClO2 radicals with NO2 at 298 K, investigated by flash photolysis with time-resolved mass spectrometry, are reported.The peroxy radical, CF2ClO2, was formed in broadband flash photolysis of CF2ClBr in the presence of O2 and detected mass spectrometrically via the fragment ion, CF2O2⁺.With NO2 present, peroxy radical decay occurs by pseudo-first-order kinetics.The decay rates are also first order in NO2.The second-order rate coefficients are pressure dependent over the 1-10 Torr experimental range.The pressure-dependent rate coefficients were fitted by the Troe expression for termolecular reactions.Numerical simulation of the peroxy radical decay rates, using a mechanism consisting of known reactions that also occur in this system, were done to investigate the influence of secondary reactions on the measured rates.