Figure 11.
The free energy surfaces in the R1, R2 space for MHDP plus 2 QM H2O (the system with the QM region given in Figure 5), for the first step of the ester hydrolysis (the cleavage of the P-O bond) obtained by (A) the PMF/COSMO model ; (B) the B3LYP//6-31G*/MM model.