THERMODYNAMIC PARAMETERS OF THE FORMATION OF 3d TRANSITION METAL COMPLEXES AS MODEL SYSTEMS FOR DESCRIPTION OF SUBSTRATE-RECEPTOR INTERACTION

The thermodynamic characteristics of the doubly charged ions of 3d metals with ligands containing oxygen, nitrogen, and fluorine donor atoms are analyzed. The complexing reactions are separated into three main groups on the basis of the changes in the enthalpy and entropy components of the Gibbs free energy. It was shown that the assignation of a reaction to a particular group is determined by the nature of the donor atoms in the ligands. The correlations between the enthalpy and entropy components of the Gibbs free energy and the atomic number of the 3d elements are studied.