KINETICS OF THE REACTIONS OF CF2CLO2 RADICALS WITH NITROGEN-DIOXIDE

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. © 1990 American Chemical Society.