Hydroxyl radical reactions with halogenated ethanols in aqueous solution: Kinetics and thermochemistry
作者:I. Morozov、S. Gligorovski、P. Barzaghi、D. Hoffmann、Y. G. Lazarou、E. Vasiliev、H. Herrmann
DOI:10.1002/kin.20301
日期:2008.4
competition kinetics with SCN− as the reference substance has been used to determine the rate constants of OH radicals with three fluorinated and three chlorinated ethanols in water as a function of temperature. The following Arrhenius expressions have been obtained for the reactions of OH radicals with (1) 2-fluoroethanol, k1(T) = (5.7 ± 0.8) × 1011 exp((−2047 ± 1202)/T) M−1 s−1, (2) 2,2-difluoroethanol
激光闪光光解结合以 SCN- 作为参考物质的竞争动力学已被用于确定 OH 自由基在水中与三种氟化和三种氯化乙醇的速率常数随温度的变化。对于 OH 自由基与 (1) 2-氟乙醇的反应,已获得以下 Arrhenius 表达式,k1(T) = (5.7 ± 0.8) × 1011 exp((-2047 ± 1202)/T) M-1 s-1 , (2) 2,2-二氟乙醇, k2(T) = (4.5 ± 0.5) × 109 exp((-855 ± 796)/T) M-1 s-1, (3) 2,2,2-三氟乙醇, k3(T) = (2.0 ± 0.1) × 1011 exp((-2400 ± 790)/T) M−1 s−1, (4) 2-氯乙醇, k4(T) = (3.0 ± 0.2) × 1010 exp((-1067 ± 440)/T) M-1 s-1, (5) 2, 2-二氯乙醇, k5(T)