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The gas phase reactions of hydroxyl radicals with a series of aliphatic alcohols over the temperature range 240–440 K

✍ Scribed by Timothy J. Wallington; Michael J. Kurylo

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
481 KB
Volume
19
Category
Article
ISSN
0538-8066

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✦ Synopsis

Absolute rate constants were determined for the gas phase reactions of OH radicals with a series of aliphatic alcohols using the flash photolysis resonance fluorescence technique. Experiments were performed over the temperature range 240-440 K at total pressures (using Ar diluent gas) between 25-50 Torr. The kinetic data for methanol ( k d , ethanol (kz), and 2-propanol (k3) were used to derive the Arrhenius expressions

At 296 K, the measured rate constants (in units of cm3 molecule-' s-') were: k , = (8.61 2 0.47), k , = (33.3 t 2.3), and 12, = (58.1 t 3.4). Room temperature rate constants for the OH reactions with several other aliphatic alcohols were also measured. These were (in the above units): 1-propanol, (53.4 2 2.9); 1-butanol, (83.1 2 6.3); and 1-pentanol, (108 ? 11). The results are discussed in terms of the mechanisms for these reactions and are compared to previous literature data.

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