Stability of complex of Cs+ with valinomycin in nitrobenzene saturated with water

Abstract

From extraction experiments and γ-activity measurements, the extraction constants corresponding to the equilibrium Cs+(aq)+Cl−(aq)+L(nb)⇆CsL+(nb)+Cl−(nb) in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated as log Kex(CsL+, Cl−)=2.2. Further, the stability constant of the valinomycin-cesium complex in nitrobenzene saturated with water was calculated: log βnb(Csl+)=10.1.