Radio S. Equilibria in Solutions of Isopoly Tungstate Anions and Their Salts with Double-Charged Cations

Object - isopoly tungstate anions and isopoly tungstates. The purpose of the work - calculation of the thermodynamic characteristics of equilibria between isopoly tungstate anions, the development of conditions of synthesis and study of the structure and properties of isopoly tungstates with doubly charged cations of s-(Ca, Sr, Ba), p-(Pb) and d-(Co, Ni) metal. Methods of investigation - pH-potentiometry, mathematical modeling (quasi-Newton method, CLINP 2.1 software; Pitzer method), elemental analysis, FTIR spectroscopy, differential thermal analysis, X-ray phase analysis, X-ray single-crystal analysis. New thermodynamic characteristics of formation of isopoly tungstate anions were calculated; rational method of prediction and the development of conditions for synthesis of new isopoly tungstates with double-charged s-, p-, and d-metal cations were elaborated. The crystal structure of 4 new polyoxotungstates were determined. Scope - inorganic, coordination and structural chemistry, inorganic synthesis, medicine.