Abstract

From extraction experiments and -activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+NaL+(nb) ML+(nb)+Na+(aq) taking place in the two–phase water–nitrobenzene system (M+ = Li+, H3O, NH4, Ag+; L = hexaethyl calix[6]arene hexaacetate; aq = aqueous phase, nb = nitrobenzene phase) were determined. Furthermore, the stability constants of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the cation order H3O<NH4<Li<Ag.

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