Abstract
The reaction of the chemical warfare agent VX with hydroxylamine anion (NH 2O −) has been studied using a combination of correlated molecular orbital and density functional theory. It has been found that the hydroxylamine anion leads to predominant formation of non-toxic products for solvolysis of VX. The calculated activation barrier for the rate determining step of hydroxylamine anion with VX was found to be lower than that of hydroperoxidolysis and suggesting a more facile solvolysis with the former α-nucleophile. The conformational search was performed for VX using Monte Carlo search method with Merck Molecular force fields (MMFFs), which lead to a more stable conformation than reported. The anomeric effect operates in the lowest energy conformation of VX and contributes towards its stabilization. The reactivity of the α-nucleophiles towards VX was correlated well with the corresponding charges on nucleophilic oxygen atoms.
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