Abstract

Rate coefficients for the elementary reaction of hydroxyl (OH) radicals with a series of selected hydrogen-containing chlorofluorcarbons (HCFC) over an extended temperature range are reported. Measurements were performed using a laser photolysis-laser induced fluorescence (LP/LJF) technique under slow flow conditions at a total pressure of 740 ± 10 Torr. Arrhenius plots of the data exhibited significant curvature and were fitted in the form of k(T) = AT^B exp(−C/T). A semi-empirical fitting approach was used in which A and B were obtained from a transition-state theory (TsT) calculation and C was determined from a nonlinear least-squares-fit to our experimental data.

© 1996 Optical Society of America