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Kinetic Study of the Reactions of Chlorine Atoms with Fluoromethane and Fluoromethane-d3 in the Gas Phase

by Kejun Shao

Institution:	University of North Texas
Year:	2017
Keywords:	kinetics; rate constants; Chemistry, Physical
Posted:	02/01/2018
Record ID:	2170197
Full text PDF:	https://digital.library.unt.edu/ark:/67531/metadc1011808/

Abstract

The kinetics of the gas-phase reactions of chlorine atoms with fluoromethane (CH3F) and fluoromethane-d3(CD3F) were tested experimentally. The relative rate method was applied by using CH4 as the reference compound for fluoromethane (CH3F) and CH4 and CH3F as the reference compound for fluoromethane-d3(CD3F). The rate constants for H-abstraction from CH3F and D-abstraction from CD3F were measured at room temperature and a total pressure of 920 Torr using Ar as a diluent. The rate constants are described by the expressions: kH= (3.500.52) x 10-13 cm3 molecule-1 s-1 and kD=(5.00.51) x 10-14 cm3 molecule-1 s-1. The kinetic isotope effect, equal to the ratio kH/kD, was found to be 7.01.2 at room temperature.Advisors/Committee Members: Marshall, Paul, Chyan, Oliver M.R., Schwartz, Martin.