Kinetic study of the reaction of chlorine atoms with dichloromethane and D-dichloromethane in the gas phase

Autor:	Katarzyna Brudnik, Jerzy T. Jodkowski, Agnieszka A. Gola, Dariusz Sarzyński
Rok vydání:	2011
Předmět:	chemistry.chemical_compound Reaction rate constant Chemistry Kinetic isotope effect Kinetics General Physics and Astronomy Physical chemistry Physical and Theoretical Chemistry Atmospheric temperature range Total pressure Kinetic energy Diluent Dichloromethane
Zdroj:	Chemical Physics Letters. 514:220-225
ISSN:	0009-2614
Popis:	The kinetics of the gas-phase reactions of chlorine atoms with dichloromethane (CH 2 Cl 2 ) and D-dichloromethane (CD 2 Cl 2 ) was studied using the relative rate method with Cl + CH 3 Br as the reference reaction. The rate constants for H-abstraction from CH 2 Cl 2 ( k H ) and D-abstraction from CD 2 Cl 2 ( k D ) were measured in the temperature range of 298–527 K and at a total pressure of 100 Torr using N 2 as a diluent. The temperature dependencies of the rate constants (with the 2 σ error limits) are described by the expressions: k H = (8.69 ± 0.82) × 10 −12 × exp(−955 ± 20/ T ) and k D = (6.98 ± 0.91) × 10 −12 × exp(−1285 ± 25/ T ) cm 3 molecule −1 s −1 . The kinetic isotope effect, described by the ratio k H / k D , was found of 3.8 ± 0.2 at room temperature.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::92e202b4fb5a934529407a0adbd68de0 https://doi.org/10.1016/j.cplett.2011.08.059 Zobrazit plný text záznamu Full Text from ScienceDirect