TEMPERATURE-DEPENDENCE AND PRODUCT DISTRIBUTION FOR THE REACTION OF CF3O RADICALS WITH METHANE

The rate coefficient for the reaction (1) CF3O+CH4-->CF3OH+CH3 has been determined using a combined laser photolysis/LIF technique. From measurements in the temperature range 235-401 K the Arrhenius expression k(1) = (3.3+/-0.8)X10(-12) exp. [-(1430+/-150 K)/T] cm(3)/s, corresponding to k(1) = 2.5 x 10(-14) cm(3)/s at 298 K is obtained. The products of reaction (1) have been identified by independent experiments using a steady-state/FTIR technique. It is concluded that the main primary product of reaction (1) is CF3OH which decomposes under our experimental conditions to yield CF2O and HF. An upper limit of the decomposition rate coefficient for (7) CF3OH-->CF2O+HF at 298 K of k(7) less than or equal to 6X10(-4) s(-1) is determined.