Laser Photolysis/Laser Induced Fluorescence Study of OH-C2H5Cl Rate Constants from 294 to 789 K

Article abstract of DOI:10.1021/j100371a005

Absolute rate coefficients for the reaction of hydroxyl radical (OH) with ethyl chloride (C2H5Cl) were measured over the temperature range 294-789 K, at atmospheric pressure, by using a laser photolysis/laser induced fluorescence technique.Hydroxyl (OH) was generated via photodissociation of N2O and the subsequent reaction of O(¹D) with H2O.Relative radical concentration was monitored versus reaction time by using laser-induced fluorescence.The data were fit to the modified Arrhenius expression k(T) = (2.96 +/- 2.94) * 10^-13(T/300)^{2.59 +/- 0.666} exp(229 +/- 624 cal mol^-1/RT), where k is in units of cm³ molecule^-1 s^-1.Random errors in the measured rate data, as determined by a propagation of error analysis, were typically 10-20percent (+/-2?).Agreement with available room-temperature literature data and proposed methods of rate constant estimation, over extended temperature ranges, are shown.