Gumerova N. Salts of s- and f-metals cations with Anderson-type heteropoly hexatungstonickelate(II)-anion

The object of research: the formation of Anderson type heteropolyanions and salts of these anions. Objective: synthesis, structure and properties of heteropoly hexatungstonickelates (II) of s-and f-metals cations, the calculation of the thermodynamic characteristics of complex formation reactions of anions with the Anderson structure. Methods: pH-potentiometry formed on the basis of mathematical modeling (program CLINP 2.1); the composition and properties of the obtained salts were investigated by chemical analysis, FTIR, SEM, X-ray diffraction analysis, and DTA. Scientific novelty: As a result, transitions between isopoly- and heteropolyanions were difined, and the zones of each ionic form domination were revealed. The logarithms of thermodynamic formation constants, Gibbs energy for reactions and standard Gibbs energy of formation of heteropoly anions with Anderson structure were calculated. The procedures for the synthesis of heteropolysalts were developed, and 19 new compounds were synthesized. Structural analysis of 4 new compounds was carried out. The practical significance of the results obtained: 19 new heteropolycompounds could potentially be used as starting materials in the synthesis of novel coordination compounds with desired properties, and materials on their basis.