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Issue 59, 2016
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Arrhenius parameters for the OH-initiated degradation of methyl crotonate, methyl-3,3-dimethyl acrylate, (E)-ethyl tiglate and methyl-3-butenoate over the temperature range of 288–314 K

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Abstract

The relative-rate technique has been employed to obtain rate coefficients for the reactions between the OH radical and four unsaturated esters (methyl crotonate (k1), methyl-3,3-dimethyl acrylate (k2), (E)-ethyl tiglate (k3) and methyl-3-butenoate (k4)) between 288 and 314 K in 760 Torr of synthetic air. The experiments were performed in a multiple-pass environmental chamber with in situ FTIR detection of the esters and reference compounds. The rate coefficients for the reactions displayed a negative dependence with temperature and low pre-exponential factors. The following Arrhenius expressions (in units of cm3 per molecule per s) were obtained: k1 = (3.39 ± 0.78) × 10−12 exp[(750 ± 159)/T], k2 = (2.95 ± 0.63) × 10−12 exp[(838 ± 182)/T], k3 = (1.49 ± 0.56) × 10−12 exp[(522 ± 114)/T] and k4 = (1.90 ± 1.25) × 10−12 exp[(834 ± 185)/T]. The kinetic results are in agreement with a mechanism involving mainly OH radical addition to the double with the reversible formation of an OH-adduct. Atmospheric implications are discussed with particular reference to the rate coefficients obtained as a function of the temperature.

Graphical abstract: Arrhenius parameters for the OH-initiated degradation of methyl crotonate, methyl-3,3-dimethyl acrylate, (E)-ethyl tiglate and methyl-3-butenoate over the temperature range of 288–314 K

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Supplementary files

Article information


Submitted
20 Apr 2016
Accepted
25 May 2016
First published
26 May 2016

This article is Open Access

RSC Adv., 2016,6, 53723-53729
Article type
Paper

Arrhenius parameters for the OH-initiated degradation of methyl crotonate, methyl-3,3-dimethyl acrylate, (E)-ethyl tiglate and methyl-3-butenoate over the temperature range of 288–314 K

J. P. Colomer, M. B. Blanco, A. B. Peñéñory, I. Barnes, P. Wiesen and M. A. Teruel, RSC Adv., 2016, 6, 53723
DOI: 10.1039/C6RA10279D

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