Solvent extraction of some univalent cations into nitrobenzene solution of dicarbollylcobaltate and extractants containing two or three oxyamide groups

Abstract

Stability constants of the complexes of some commercially available ligands, containing two or three oxyamide groups in nitrobenzene have been determined from the extraction data. The systems aqueous solution of sodium or lithium picrates – nitrobenzene solution of the ligand and aqueous solution of nitrate of univalent cation – equimolar mixture of ligand and sodium dicarbollylcobaltate in nitrobenzene were used. We found that the stability constants generally increase with the decreasing ionic diameter of the respective cation. The stability constants of lithium with Lithium Ionophore VIII and Sodium ionophore I are higher than that with any other ligands known.