Self-reactions of isopropylperoxy radicals in the gas phase

Abstract

The photo-oxidation of 2,2′-azopropane has been studied in order to determine the overall rate constant for the second-order removal of isopropylperoxy radicals. Arrhenius parameters of log₁₀(A_obs/dm³ mol^–1 s^–1)= 9.15 ± 0.03 and E_obs= 18.65 ± 0.50 kJ mol^–1 have been determined over a temperature range 300–373 K. These values are compared with those obtained for the self-reactions of primary and tertiary alkylperoxyradicals, and the corresponding reactions in solution.