Rate constants for the reactions of OH radicals and Cl atoms with Di-n-Propyl ether and Di-n-Butyl ether and their deuterated analogs

Abstract

Using relative rate methods, rate constants for the gas-phase reactions of OH radicals and Cl atoms with di-n-propyl ether, di-n-propyl ether-d14, di-n-butyl ether and di-n-butyl ether-d18 have been measured at 296 ± 2 K and atmospheric pressure of air. The rate constants obtained (in cm3 molecule−1 s−1 units) were: OH radical reactions, di-n-propyl ether, (2.18 ± 0.17) × 10−11; di-n-propyl ether-d14, (1.13 ± 0.06) × 10−11; di-n-butyl ether, (3.30 ± 0.25) × 10−11; and di-n-butyl ether-d18, (1.49 ± 0.12) × 10−11; Cl atom reactions, di-n-propyl ether, (3.83 ± 0.05) × 10−10; di-n-propyl ether-d14, (2.84 ± 0.31) × 10−10; di-n-butyl ether, (5.15 ± 0.05) × 10−10; and di-n-butyl ether-d18, (4.03 ± 0.06) × 10−10. The rate constants for the di-n-propyl ether and di-n-butyl ether reactions are in agreement with literature data, and the deuterium isotope effects are consistent with H-atom abstraction being the rate-determining steps for both the OH radical and Cl atom reactions. © 1999 John Wiley & Sons, Inc. Int J Chem Kinet 31: 425–431, 1999