Abstract
The c-C6H12/c-C6D12 kinetic isotope effect (KIE), the k6/k5 rate constant ratio (c-C6H12/c-C5H10), and the temperature dependence of these ratios in the gas-phase reactions of cycloalkanes with peroxynitrous acid and OH radicals are identical. The same result was obtained for the reactions in aqueous solution. These data are in accord with the conclusion that OH· radicals formed in the homolysis of the HO-ONO bond are the active species in the reactions of HOONO with hydrocarbons in aqueous solution and in the gas phase.
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