Rate Coefficients Of Hydroxyl Radical Reaction With 1-Chlorocyclopentene Over A Temperature Range Of 262-335 K

The rate coefficients for reactions of 1-chlorocyclopentene with OH have been measured in the temperature range of 262-335 K, at total pressure of 30 Torr, using Laser Photolysis-Laser Induced Fluorescence. The rate coefficient can be expressed as k(T)=(6.32 +/- 1.16) x 10(-12) exp((669 +/- 45)/T) cm(3) molecule s(-1) s(-1), and thus it depends weakly on temperature. It decreases with increasing temperature, which was attributed to formation of a pre-reactive complex between reactants. Molecular orbital calculations confirm participation of such a complex during an addition reaction, and also predict several other hydrogen abstraction pathways. The studies suggest the dominance of addition reaction over H atom abstraction in the reaction of 1-chlorocyclopentene with OH.