A Single Pulse Shock Tube Study of C2 Cl6 Decomposition: Are the Kinetics Consistent With the Proposed Thermochemistry of C2Cl6, CCl3 and C2Cl5?

Published

January 1, 2003

Author(s)

Jeffrey A. Manion, Iftikhar A. Awan, Wing Tsang

Abstract

Single pulse shock tube studies of the thermal decomposition of hexachloroethane at temperatures of 960 - 1080 K and pressures of 130 -1,100 kPa have been carried our using the comparative rate technique. Decomposition proceeds via spitting of the C-C bond with about a 12% contribution from C-Cl bond fission. A 60% increase in the rate constant was observed over the pressures studied. Fall-off curves for the reaction were derived, and in conjunction with data from the RRKM model was developed that provides a good fit to the relevant kinetic data spanning 250 - 1080 K. The results support recently proposed changes to the heats of formation of highly chlorinated compounds and are consistent with δ_f H [CCI]₃, 298.15 K] = (71.2 3.5) kj mol^-1 and δ_f H [C₂Cl₅, 298.15 K] = 21.4 6.7) kJ mol^-1.

Proceedings Title

Proceedings of the 3rd Joint Meeting of the U.S. Sections of the Combustion Institute

Conference Dates

March 16-19, 2003

Conference Title

Joint Meeting of the Combustion Institute

Pub Type

Conferences

Keywords

hexachloroethane, hindred-Gorin, kinetics, thermal decomposition RRKM

Citation

Manion, J. , Awan, I. and Tsang, W. (2003), A Single Pulse Shock Tube Study of C₂ Cl₆ Decomposition: Are the Kinetics Consistent With the Proposed Thermochemistry of C₂Cl₆, CCl₃ and C₂Cl₅?, Proceedings of the 3rd Joint Meeting of the U.S. Sections of the Combustion Institute (Accessed October 2, 2025)