Kinetics of OH radical reactions with a series of ethers

Abstract

AbstractThe rate constants for the reactions of OH with dimethyl ether (k1), diethyl ether (k2), di‐n‐propyl ether (k3), di‐isopropyl ether (k4), and di‐n‐butyl ether (k5) 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 k1,k4, can be expressed in the Arrhenius plots form: k1 = (6.30 ± 0.10) × 10−12 exp[−(234 ± 34)/T] and k4 = (4.13 ± 0.10) × 10−12 exp[(274 ± 26)/T]. The Arrhenius plots for k2,k3, and k5, were curved and they were fitted to the three parameter expressions: k2 = (1.02 ± 0.08) × 10−17 T2 exp[(797 ± 24)/T], k3 = (1.84 ± 0.23) × 10−17T2 exp[(767 ± 34)/T], and k5 = (6.29 ± 0.74) × 10−18T2 exp[(1164 ± 34)/T]. The values at 298 K are (2.82 ± 0.21) × 10−12, (1.36 ± 0.11) × 10−11,(2.17 ± 0.16) × 10−11, (1.02 ± 0.10) × 10−11, and (2.69 ± 0.22) × 10−11 for k1, k2, k3, k4, and k5, respectively, (in cm3 molecule−1 s−1). These results are compared to the literature data. © 1995 John Wiley & Sons, Inc.