The hydrolysis of distributed alkyl phosphorochloridates and N,N,N', N' -tetra-substituted phosphoridiamidic chlorides in water and deuterium oxide: heat capacity of activation and kinetic solvent isotope effects

The pseudo-thermodynamic parameters, ΔH ≠ , ΔS ≠ , and ΔC p ≠ and the kinetic solvent isotope effects have been determined for the three alkyl-phosphorochloridates, where the alkyl group is ethylisopropyl and n-propyl; for tetra-methyl and tetra-ethyl phosphorodiamidic chlorides; the di-n-propyl and di-isopropyl analog, the di(isopropylmethylcarbinyl)phosphorochloridate and the tetra-ethylthiophosphorodiamidic chloride. These compounds have a potential relationship to compounds used as insecticides and as polymers. The mechanism of reaction is discussed on the basis of these data.