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.