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- W2087806037 abstract "The mechanism for the hydrolysis of the methyl phosphate anion was studied using high-level ab initio and density functional theory methods. Starting from the molecular species CH3OPO3H-, CH3OPO3H-·(H2O), and CH3OPO3H-·(H2O)2, gas phase reaction coordinates of the proposed mechanisms were followed. Solvation free energies were evaluated using the polarizable continuum model (PCM) at the stationary point geometries. The dissociative mechanism, which involves the formation of a metaphosphate ion (PO3-), is found to be more favorable than the associative mechanism, which involves a pentacoordinated intermediate, both in the gas phase and in aqueous solution. In the dissociative mechanism, the first step is rate determining. The computed free energy of activation in solution is within 1.7 kcal/mol of the experimentally determined activation free energy for hydrolysis. The first step and the second step in the dissociative mechanism are each shown to proceed via a six-centered water-assisted transition state." @default.
- W2087806037 created "2016-06-24" @default.
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- W2087806037 date "1999-06-15" @default.
- W2087806037 modified "2023-10-16" @default.
- W2087806037 title "Theoretical Studies of the Hydrolysis of the Methyl Phosphate Anion" @default.
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- W2087806037 doi "https://doi.org/10.1021/jp9835061" @default.
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