Salicylate Coordination Compounds of Iron, Models of Their Formation

Method oksidimetryis a highly sensitive, low-cost, easy-to of the experiment and was used extensively in the study of complex transition metal anions of monobasic organic acids in the acid pH range. In the presence of polybasic acids or multi-ligand, when the probability of formation of heterovalent coordination compounds, complexes with protonated complex composition, mixed ligands require new approaches and methods of thermodynamic calculations. Proposed oxidative function and the principle of equilibrium modeling, which allows to study the processes of formation of complexes of any complexity in the whole pH range, as well as using computer programs to accelerate the calculations and improve their accuracy. The possibility of using oxidative function and principle of modeling for the study of complex systems with multi-ligand: Fe (II)-Fe (III)-hydroxybenzoic (salicylic) acid-water. Drawn up on the basis of the experimental data model is the model parameters: structure, stability, the existence, degree of accumulation (mole fractions) formed salicylate coordination compounds of iron. Shown that the most stable are binuclear coordination compounds and heterovalent complex - Fe III Fe II L 2 ОН 0 . Model parameters allowed a clear distinction between the domain of existence, domination and isolation of a stable solution with a high degree of accumulation of biologically active complexes of practical interest. So they can be ready.