Pulse radiolysis studies of the reaction of H and OH radicals and hydrated electrons with pyridine

Abstract

The transients produced by the reactions of pyridine with H and OH radicals (–H˙C₅H₅N˙H⁺, –HO˙C₅H₅N˙H⁺, –HO˙C₅H₅N, –C₅H₅N˙OH) and hydrated electrons (–C₅H₅N˙H) have been studied using the technique of pulse radiolysis. The adsorption spectra of these species were obtained. Their formation and decay were studied under a variety of conditions, and rate constants for the following reactions obtained: [graphic omitted] By computer analysis the second-order decay constants of ˙HPyH⁺ and ˙HOPyH⁺ radicals were found to be 3 × 10⁸ M^–1 sec^–1, and those of ˙HOPy, ˙PyN—OH and ˙PyN—H gave a value of 4 × 10⁸ M^–1 sec^–1. The abbreviations denote [graphic omitted].