Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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A Gas Phase Kinetic Study on the Thermal Decomposition of $ClCH_2CH_2CH_2Br$

  • Kim, Sung-Hoon (Department of Chemistry, Seoul National University) ;
  • Choo, Kwang-Yul (Department of Chemistry, Seoul National University) ;
  • Jung, Kyung-Hoon (Department of Chemistry, Korea Advanced Institute of Science and Technology)
  • Published : 1989.06.20
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Abstract

The gas phase thermal decomposition of 1-bromo-3-chloropropane in the presence of radical inhibitor was studied by using the conventional static system. The mechanism of unimolecular elimination channel is shown below. [...] In this scheme, the total molecular dissociation rate constant, ($k_1\;+\;k_2$), for the decomposition of $BrCH_2CH_2CH_2Cl$ was determined by pyrolyzing the $BrCH_2CH_2CH_2Cl$ in the temperature range of $380-420^{\circ}C$ and in the pressure range of 10∼100 torr. To obtain $k_3\;and\;k_4,\;and\;to\;obtain\;k_1\;and\;k_2$ independently, the thermal decompositions of allyl chloride and allyl bromide were also studied. The Arrhenius parameters for each step are as follows; $log\;A_{\infty}\;=\;14.20(sec^{-1}),\;E_a$ = 56.10(kcal/mol) for reaction path 1; $log\;A_{\infty}\;=\;12.54(sec^{-1}),\;E_a$ = 49.75(kcal/mol) for reaction path 2; $log\;A_{\infty}\;=\;13.41(sec^{-1}),\;E_a$ = 50.04(kcal/mol) for reaction path 3; $log\;A_{\infty}\;=\;12.43(sec^{-1}),\;E_a$ = 52.78(kcal/mol) for reaction path 4; Finally, the experimentally observed pressure dependence of the rate constants in each step is compared with the theoretically predicted values that are obtained by the RRKM calculations.

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Cited by

  1. ChemInform Abstract: A Gas Phase Kinetic Study on the Thermal Decomposition of ClCH2CH2CH2Br vol.20, pp.52, 1989, https://doi.org/10.1002/chin.198952049
  2. Kinetics of the gas-phase thermal decomposition of 3-bromopropene vol.52, pp.4, 2011, https://doi.org/10.1134/s0023158411040100