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 bee n determined using a combined laser photolysis/LIF technique. From mea surements 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, correspon ding to k(1) = 2.5 x 10(-14) cm(3)/s at 298 K is obtained. The product s of reaction (1) have been identified by independent experiments usin g a steady-state/FTIR technique. It is concluded that the main primary product of reaction (1) is CF3OH which decomposes under our experimen tal conditions to yield CF2O and HF. An upper limit of the decompositi on rate coefficient for (7) CF3OH-->CF2O+HF at 298 K of k(7) less than or equal to 6X10(-4) s(-1) is determined.