Mechanism for the gas-phase reaction between OH and 3-methylfuran: A theoretical study

The mechanism for the OH + 3-methylfuran reaction has been studied via ab initio calculations to investigate various reaction pathways on the doublet potential energy surface. Optimizations of the reactants, products, intermediates, and transition structures are conducted using the MP2 level of theory with the 6-311G(d,p) basis set. The single-point electronic energy of each optimized geometry is refined with G3MP2 and G3MP2B3 calculations. The theoretical study suggests that the OH + 3methylfuran reaction is dominated by the formation of HC(O)CH=,C(CH,)CHOH (P7) and CH(OH)CH=C(CH3)C(O)H (P9), formed from two low-lying adducts, IM1 and IM2. The direct hydrogen abstraction pathways and the S(N)2 reaction may play a minor or negligible role in the overall reaction of OH with 3-methylfuran. (c) 2008 Wiley Periodicals, Inc.