Temperature dependence of the kinetic isotopic effect of the reaction of Cl atoms with C2H5Cl between 298 and 550K
作者:Dariusz Sarzyński、Agnieszka A. Gola、Katarzyna Brudnik、Ryszard Berkowski、Jerzy T. Jodkowski
DOI:10.1016/j.cplett.2012.09.072
日期:2012.12
gas-phase reactions of chlorine atoms with chloroethane and chloroethane-d5 was studied experimentally. The relative rate method was applied using Cl + CH3Cl as the reference reaction. The overall rate constants for H-abstraction from C2H5Cl (kH), D-abstraction from C2D5Cl (kD), the site-specific rate constants for H-abstraction from α-carbon (kH,α) and β-carbon (kH,β) atoms of C2H5Cl were measured in the
实验研究了氯原子与氯乙烷和氯乙烷-d 5的气相反应动力学。使用Cl + CH 3 Cl作为参考反应,采用相对速率法。从C 2 H 5 Cl(k H)吸氢的总速率常数,从C 2 D 5 Cl(k D)吸氢的总速率常数,从α碳(k H C 2 H 5的(α)和β-碳(k H,β)原子在总压力为100 Torr的情况下,在298–550 K的温度范围内测量了Cl。速率常数的温度相关性由下式给出:k H =(2.41±0.21)×10 -11 ×exp(-316±11 / T),k H,α =(1.36±0.09)×10 -11 ×exp (-202±8 / T),k H,β =(1.14±0.11)×10 -11 ×exp(-592±16 / T)和k D =(1.58±0.14)×10 -11 ×exp(- 474±13 / T)cm 3 分子-1 s -1。还估算了动力学同位素效应的值k