Distribution of Microamounts of Cesium in the Two–Phase Water–HCl–Nitrobenzene–2,3-Naphtho-15- crown-5–Hydrogen Dicarbollylcobaltate Extraction System

Extraction of microamounts of cesium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B–) in the presence of 2,3-naphtho-15-crown-5 (N15C5, L) has been investigated. The equilibrium data have been explained assuming that the complexes HL+, HL+ 2, CsL+ and CsL+ 2 are extracted into the organic phase. The values of extraction and stability constants of the species in nitrobenzene saturated with water have been determined.