Table also lists values for PM3/COSMO and PM6/COSMO as implemented in MOPAC for comparison. This COSMO implementation only evaluates the polar part of the solvation free energy and will not be as accurate as properly parameterized COSMO-RS values. For PM3, the SMD † results are significantly lower than the corresponding COSMO results, while for PM6 there is only a significant improvement for cations.