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- W2006332105 abstract "Abstract Direct ab-initio dynamics calculations have been applied to a gas phase SN2 reaction F−+CH3Cl→CH3F+Cl−. An ab-initio potential energy surface including all degrees of freedom was used. Total energies and gradients were calculated at each time step. Results for near-collinear collision are reported. The initial geometrical configurations of (F-+CH3Cl) at time zero were randomly generated in the range 180±3° for the collision angle ∠F–C–Cl and of r(F−–C)=6.0–6.5 A. The vibrational phase of CH3Cl was generated to take a temperature of 10 K. It was found that almost all available energy is partitioned into the relative translational mode between the products (∼43%) and the C–F stretching mode (∼57%) at zero collision energy. The other internal modes of CH3F remain in the ground state. The lifetimes of early- and late-complexes F−⋯CH3Cl and FCH3⋯Cl− were short enough to dissociate directly to products, while the energy was not completely distributed within the lifetime. It is concluded that the SN2 reaction F−+CH3Cl proceeds non-statistically via a direct mechanism in the case of near-collinear collision." @default.
- W2006332105 created "2016-06-24" @default.
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- W2006332105 date "1999-04-01" @default.
- W2006332105 modified "2023-10-17" @default.
- W2006332105 title "A direct ab-initio dynamics study on a gas phase SN2 reaction F−+CH3Cl → CH3F+Cl−: dynamics of near-collinear collision" @default.
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- W2006332105 doi "https://doi.org/10.1016/s0009-2614(99)00212-2" @default.
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