Kinetics of OH radical reaction with allyl alcohol (H2CCHCH2OH) and propargyl alcohol (HCCCH2OH) studied by LIF

The rate constants for the reactions of hydroxyl radical (OH) with two unsaturated alcohols (ROH) namely, allyl alcohol (H2CCHCH2OH) and propargyl alcohol (HCCCH2OH) in the gas phase have been measured. The kinetic measurements were carried out using laser photolysis (LP) combined with laser induced fluorescence (LIF) technique at room temperature over a pressure range of 10–20 Torr. The bimolecular rate constants for the reactions OH+ROH→products, are determined at room temperature to be (3.7±0.5)×10−11, (9.2±1.4)×10−12 cm3 molecule−1 s−1, respectively, for allyl alcohol and propargyl alcohol. The measured rate constants in combination with ab initio molecular orbital calculation provide a better understanding of the structure-reactivity rules.