Fourier transform infrared study of the self reaction of C₂H₅O₂ radicals in air at 295 K

Abstract

Abstract Fourier transform infrared spectroscopy was used to identify and quantify products of the self reaction of ethylperoxy radicals, C 2 H 5 O 2 , formed in the photolysis of Cl 2 /C 2 H 6 mixtures in 700 torr total pressure of synthetic air at 295 K. From these measurements, branching ratios for the reaction channels equation image of k 1a /( k 1a + k 1b ) = 0.68 and k 1c /( k 1a + k 1b + k 1c ) ⩽ 0.06 were established. Additionally, using the relative rate technique, the rate constant for the reaction of Cl atoms with C 2 H 5 OOH was determined to be (1.07 ± 0.07) × 10 −10 × cm 3 molecule −1 s −1 . Results are discussed with respect to the previous kinetic and mechanistic studies of C 2 H 5 O 2 radicals.