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- W2009302790 abstract "The selected ion flow tube technique is used to study 14 termolecular association reactions of hydroxide–water (OH− + H2O and OD− + D2O), methoxide–water (CH3O− + H2O, CH3O− + D2O, CD3O− + H2O, and CD3O− + D2O), methoxide–methanol (CH3O− + CH3OH, CH3O− + CH3OD, CD3O− + CD3OH, and CD3O− + CD3OD), and ethoxide–ethanol (CH3CH2O− + CH3CH2OH, CH3CD2O− + CH3CD2OH, CD3CH2O− + CD3CH2OH, and CD3CD2O− + CD3CD2OD) where the cluster bond dissociation energies are similar (∼24–30 kcal/mol). The apparent second-order rate coefficients for association (kIIapp) are measured as a function of helium pressure over the range of 0.25–1.2 Torr at 300 K. The derived termolecular rate coefficients and complex lifetimes are generally larger for systems with more degrees of freedom in the intermediate ion–molecule complex. In all reactions with alkoxides, association rates are significantly enhanced by deuteration of the alkyl groups (by factors of 1.4–3.0) whereas deuteration of the bridging hydrogen does not affect the association rates. Potential energy surfaces for association (single versus double well) are discussed based on the pressure dependence of the association rates." @default.
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- W2009302790 date "2000-01-01" @default.
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- W2009302790 title "Gas-phase association reactions of hydroxide, methoxide, ethoxide, and their deuterated analogs" @default.
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- W2009302790 doi "https://doi.org/10.1016/s1387-3806(99)00197-9" @default.
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