KINETICS AND MECHANISM OF THE REACTION OF CF3 RADICALS WITH NO2

The reaction of CF3 with NO2 was studied at 296 +/- 2K using two diffe rent absolute techniques. Absolute rate constants of (1.6+/-0.3) x 10( -11) and (2.1(-0.3)(+0.7)) x 10(-11) cm(3) molecule(-1) s(-1) were der ived by IR fluorescence and UV absorption spectroscopy, respectively. The reaction proceeds via two reaction channels: CF3 + NO2 --> CF2O FNO, (70 +/- 12)% and CF3 + NO2 --> CF2O + NO, (30 +/- 12)%. An upper limit of 11% for formation of other reaction products was determined. The overall rate constant was within the uncertainty independent of to tal pressure between 0.4 to 760 torr. (C) 1996 John Wiley & Sons, Inc.