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Kinetics of the reactions of OH radicals with selected acetates and other esters under simulated atmospheric conditions

✍ Scribed by Dale C. Williams; Lawrence N. O'Rji; Daniel A. Stone

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
554 KB
Volume
25
Category
Article
ISSN
0538-8066

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✦ Synopsis

The relative hydroxyl radical reaction rate constants from the simulated atmospheric oxidation of selected acetates and other esters have been measured. Reactions were carried out at 297 2 2 K in 100-liter FEP Teflon@-film bags. The OH radicals were generated from the photolysis of methyl nitrite in pure air. Using a rate constant of 2.63 X lo-" cm3 molecule-' s-l for the reaction of OH radicals with propene, the principal reference organic compound, the rate constants (x1Ol2 cm3 molecule-' s-*) obtained for the acetates and esters used in this study are: n -propyl acetate 3.42 rt 0.87 n -butyl acetate 5.71 2 0.94 n-pentyl acetate 7.53 2 0.48 2-ethoxyethyl acetate 10.56 t 1.31 2 -ethoxyethyl isobutyrate 13.56 rt 2.32 2 -ethoxyethyl methacrylate 27.22 2 2.06 4penten-1-yl acetate 43.40 2 3.85 3-Ethoxyacrylic acid ethyl ester 33.30 2 1.22 Error limits represent 20 from linear least-squares analysis of data. A linear correlation was observed for a plot of the measured relative rate constants vs. the number of CH2 groups per molecule of the following acetates: methyl acetate, ethyl acetate, n-propyl acetate, butyl acetate, and pentyl acetate.

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