Applicability of the Free Energies of Solvation for the Prediction of Ecotoxicity: Study of Chlorophenols

Abstract
Free energies of solvation of chlorophenols were calculated in two solvents: water and n-hexadecane from the AMSOL program. These free energies of solvation are the sum of two terms: polarization free energies (ΔG ENP) and cavity, dispersion, solvent structure free energies ( CDS). This study shows, in the case of chlorophenols, that a direct relation exists between one of the two components for the calculation of free energy (G°CDS) in water and in n-hexadecane, and the ecotoxicity values for five biological systems. We point out the interest of using these new descriptors in QSAR study.