Otroshko N. Conduction, viscosity and structural and dynamic characteristics of solvation of nickel (II) and calcium (II) salts in middle permittivity solvent

Objects of investigation: solutions of NiCl2, [Ni(en)3]Cl2 and CaCl2 in methanol and dimethyl sulphoxide, Ni(ClO4)2 and [Ni(en)3](ClO4)2 in acetonitrile. Aim of investigation: establishment of regularities of influence of temperature, nature of ion and nonaqueous solvent on solvation, association and complexing in 2-1 electrolyte solutions. Methods: conductometry, viscosimetry spectrophotometry, quantum-chemical calculations. Atomic charge distribution of complex of nickel (II) was determined. The role of boundary atoms in interactions between first and second solvate shell was ascertained. The model of solvation of ion Ni(en)3]2+ in nonaqueous solvents was proposed. The leading role of structuredness of solvents and ion-molecular interaction type in temperature dependence of dynamic solvation characteristics was determined. The formation of contact ion pair in NiCl2 methanol solution and solventshared ion pairs in NiCl2 dimethyl sulphoxide solution and Ni(ClО4)2 acetonitrile solution was proved. Application is scheduled to educational process. Field is electrochemistry.