Abstract
The rate constants for the reactions of the hydroxyl radical, HO and DO, with 2-vinylfuran (k1 and k2) were measured at 295±2 K using the method of pulsed laser photolytic generation of HO or DO, combined with pulsed laser induced fluorescence detection. For DO, mono-exponential decay profiles were observed, enabling a simple analysis to extract a value of k2=(8.8±0.9)×10−11 cm3 molecule−1 s−1. In contrast, the decay of HO was complex, due to its regeneration in secondary reactions, and was analysed using a multi-exponential expression that enabled a rate constant of k2=(9.0±1.0)×10−11 cm3 molecule−1 s−1 to be extracted. The different behaviour of HO and DO provides clues to the reaction mechanism, which involves ring opening and a rearrangement/HO-elimination step. As part of this work the UV-absorption spectrum of 2-vinylfuran is also reported.
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