Kinetics of the reactions of CF3O2 radicals with Cl and I atoms

Abstract

A discharge fast-flow tube equipped with laser-induced fluorescence detection of NO2, produced from the reaction of CF3O2 with NO, and resonance fluorescence detection for Cl and I atoms, has been employed to determine the rate constants for the reactions CF3O2+Cl→products (1) and CF3O2+I→products (2), at T=296±1 K and P=ca. 2 Torr. The rate constants (in cm3 molecule-1 s-1) have been found to be k1=(4.2±0.8)×10-11 and k2=(3.7±0.8)×10-11. Experimental evidence suggests that ClO is a major product of reaction (1), whereas IO is not produced in reaction (2). A brief discussion of the likely pathways of the reactions is presented.