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- W2140934404 abstract "The reaction mechanism of the gas-phase HO-initiated oxidation of furan has been investigated by means of high level theoretical methods. The reaction is a complex process that begins with the formation of a pre-reactive hydro- gen bonded complex, previous to the addition of the HO radical to furan, forming the 2 and 3-HO-adducts. In the pre- reactive complex, the hydrogen bond is formed by interaction between the hydrogen of the hydroxyl radical and the π sys- tem of furan and its stability is computed to be 1.6 kcal·mol -1 (including the BSSE corrections). The 2 and 3-HO-adducts are computed to be 30.5 and 12.5 kcal·mol -1 respectively, more stable than the reactants. The transition state leading to the formation of the 2-HO-adduct lies below the energy of the separate reactants (0.5 kcal·mol -1 ) and the transition state pro- ducing the 3-HO-adduct that is computed to lie 3.4 kcal·mol -1 above the sum of the energies of furan and hydroxyl radical. There are four reaction paths for the ring-opening of the 2-HO-adduct, leading to the formation of different conformers of 4-hydroxybutenaldehyde radical. The most stable of these conformers presents a cyclic symmetric (C 2V ) structure and can be characterized as a low-barrier hydrogen bond. The geometry optimizations and characterizations done in this work were carried out at MP2/6-311G(d,p), MP2/6-311+G(2df,2p) and QCISD/6-311G(d,p) levels of theory, whereas the rela- tive energies are obtained at CCSD(T)/cc-pVTZ level of theory." @default.
- W2140934404 created "2016-06-24" @default.
- W2140934404 creator A5067761441 @default.
- W2140934404 date "2008-10-13" @default.
- W2140934404 modified "2023-10-09" @default.
- W2140934404 title "The Gas Phase HO-Initiated Oxidation of Furan: A Theoretical Investigation on the Reaction Mechanism" @default.
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- W2140934404 doi "https://doi.org/10.2174/1874412500801010080" @default.
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