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Kinetics of OH radical reactions with a series of ethers

✍ Scribed by A. Mellouki; S. Teton; G. Le Bras

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
819 KB
Volume
27
Category
Article
ISSN
0538-8066

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✦ Synopsis

The rate constants for the reactions of OH with dimethyl ether (kl), diethyl ether ( k z ) , di-n-propyl ether ( k 3 ) , di-isopropyl ether ( k 4 ) , and di-n-butyl ether ( k 5 ) have been measured over the temperature range 230-372 K using the pulsed laser photolysis-laser induced fluorescence (PLP-LIF) technique. The temperature dependence of k l , k 4 , can be expressed in the Arrhenius plots form: k l = (6.30 ? 0.10) X exp[-(234 2 34)/T] and k4 = (4.13 _f 0.10) X 10-l' exp[(274 ? 26)/T]. The Arrhenius plots for k z , k 3 , and k.5, were curved and they were fitted to the three parameter expressions: kz = (1.02 2 0.08) x 10-17T2 exp[(797 2 24)/T], k3 = (1.84 ? 0.23) X 10-17T2 exp[(767 ? 34)/T], and k5 = (6.29 2 0.74) X lO-lsT2 exp[(1164 2 34)/T]. The values at 298 K are (2.82 t0.21) X (2.17 2 0.16) x and (2.69 ? 0.22) X 10-l' for k l , k 2 , k 3 , k 4 , and k 5 , respectively, (in cm3 molecule-' s-'). These results are compared to the literature data. 0 1995 John Wiley & Sons, lnc.

(1.36 2 0.11) X (1.02 ? 0.10) x

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