Kinetics of the reaction of CH3O2 radicals with NO2

The kinetics of the gas-phase reaction of CH3O2 radicals with NO2 were studied at 295 K in 0.5–14 atm of SF6 diluent using pulse radiolysis combined with time-resolved UV–VIS spectroscopy. Rate data were obtained by following the loss of CH3O2 using a monitoring wavelength of 260 nm. The results were well described using the Troe formula with Fc=0.40±0.09, k0=(1.46±0.50)×10−30 cm6 molecule−1 s−1 and k∞=(1.81±0.25)×10−11 cm3 molecule−1 s−1. These results are compared to the previous data and discussed in terms of reactivity trends and the atmospheric chemistry of peroxy radicals.