Zmiyevska T. Physico-chemical characteristics of melts of alkaline metal threefluoroacetic and thiocyanate complexes with crown-ethers.

The dissertation dedicated to syntesis and studying of physico-chemical properties of melts treefluoroacetic and thiocyanate complexes with crown-ethers (B12C4, 15C5, B15C5, 18C6, DB18C6). It was measured melt temperature, density, electroconductivity and IR-spectrums for the complex compound melts. The molar volumes and molar electroconductivity were calculated for the melts. It was determined that complex cation is formed at decreased electroconductivity in comparison with pure salts. Melting point and molar electroconductivity of thiocianate melts is higher then in threefluoroacetic melts. The electroconductivity of sandwich complex melts is higher then the others complex type. The phase diagrams of quazi binary system of thiocianate sodium and potassium with crown-ethers (B12C4, B15C5, 18C6, DB18C6) systems were studied. The criterion of relative stability for the systems with different ligands formulated on the basis of studies of phase equilibrium in KNCS - B15C5 and KCF3CO2 - DB18C6. It was shown that two layer melt is reqularity of SAM-CE systems. This conclusion proved for nine complecated complex systems, that include salts and complex compounds with different cations, anions and crown-ethers. The electrochemical characteristic of melts of LiSCN*18C6 and LiCF3CO2*18C6 complexes was obtained.