The solvent effect on the electronegativity and hardness of bonded atoms

The role of solvent interactions in modifying the electronegativity (χ) and hardness (η) of bonded atoms has been studied. The simple virtual charge model of a homogeneous polar medium was chosen for the description of the solvent properties. Molecular χ and η indices show minor dependences on the solvent polarity. The hardness of ions decreases with increasing solvent polarity whereas the electronegativity index decreases for cations and increases for anions.