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Kinetics of the reactions of OH radicals with selected acetates and other esters under simulated atmospheric conditions
Author(s) -
Williams Dale C.,
O'Rji Lawrence N.,
Stone Daniel A.
Publication year - 1993
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550250704
Subject(s) - chemistry , radical , methyl acetate , ethyl acetate , reaction rate constant , butyl acetate , photodissociation , molecule , medicinal chemistry , organic chemistry , kinetics , acetic acid , solvent , physics , quantum mechanics
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 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 × 10 −11 cm 3 molecule −1 s −1 for the reaction of OH radicals with propene, the principal reference organic compound, the rate constants (×10 12 cm 3 molecule −1 s −1 ) obtained for the acetates and esters used in this study are:Textn –propyl acetate 3.42 ± 0.87n –butyl acetate 5.71 ± 0.94n –pentyl acetate 7.53 ± 0.48 2–ethoxyethyl acetate 10.56 ± 1.31 2–ethoxyethyl isobutyrate 13.56 ± 2.32 2–ethoxyethyl methacrylate 27.22 ± 2.06 4–pentene‐1‐yl acetate 43.40 ± 3.85 3–Ethoxyacrylic acid ethyl ester 33.30 ± 1.22Error limits represent 2σ 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 CH 2 groups per molecule of the following acetates: methyl acetate, ethyl acetate, n ‐propyl acetate, butyl acetate, and pentyl acetate. © 1993 John Wiley & Sons, Inc.