Philippe Dagaut, Renzhang Liu, Timothy J. Wallington
1989
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0
Influential Citations
17
Citations
Journal
International Journal of Chemical Kinetics
Abstract
Using the flash photolysis resonance fluorescence technique, absolute rate constants were determined for the gas phas reactions of hydroxyl radicals with a series od aliphatic polyethers. At 298 K, the measured rate constants (in units of 10 −12 cm 3 molecule −1 s −1 ) were: 2,2-dimethoxypropane, (3.9±0.2) ; 2,2-diethoxypropane, (11.7±1.3); 1,2-dimethoxypropane, (14.3±1.5); 2-methoxyethylether, (17.5±1.1); 2-ethoxyethyether, (26.8±2.4); 1,1-dimethoxyethane, (8.9±1.0); and 1,1,3-trimethoxypropane, (16.7±1.0). The temperature dependencies of the rate constants for 2-2-dimethoxypropane and 2,2-diethoxypropane, reactions (1) and (2), were studied over the temperature range 240-440 K and are expressed by the Arrhenius equations: k 1 =(3.55±0.39)×10 −12 exp[(30±35)/T] cm 3 molecule −1 s −1 ; k 2 =(1.06±0.25)×10 −11 exp[(15±75)/T] cm 3 molecule −1 s −1 . Implications of the results are discussed in terms of reaction mechanisms and the prediction of gas phase OH radical reaction rates for alphatic polyethers