THE INFLUENCE OF MEDIA POLARITY ON THE ELECTRONIC-STRUCTURE AND ENERGY OF MOLECULES IN SOLUTIONS

Results of resent years' studies of the effect of environment polarity on the states of molecules with different type of chemical bonds in solutions are summarized. The change of the electronic structure and the energies of molecules, variation of physicochemical properties caused by this change, and its role in a number of processes in solution (tautomeric and conformational transformations, nucleophilic substitution and proton transfer) are considered. A special attention is devoted to the new concepts of preferred stabilization of molecular forms or ionic ones of salts and complexes with intermolecular hydrogen bond in media of different polarity.