Isotope effects in reactions of trifluoromethyl radicals with hydrogen chloride and hydrogen sulphide
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Transactions of the Faraday Society
- Vol. 65, 434-440
- https://doi.org/10.1039/tf9696500434
Abstract
Rate constants, Arrhenius parameters and primary kinetic isotope effects have been measured for the reactions of trifluoromethyl radicals with H2S, D2S, HCl and DCl: [graphic omitted] Quotients of A-factors do not differ significantly from unity, but values for (ED–EH) are significantly less than the respective zero-point-energy differences ΔE0 of 1.1 kcal mole–1. The reactivity of CF3 radicals towards the two substances is markedly less than that of CH3 radicals; the differences reside in the higher activation energies and may be attributed to the polar character of CF3.Keywords
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