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Extraction of NH4+, K+, Rb+ and Tl+ into nitrobenzene using cesium dicarbollylcobaltate in the presence of dibenzo-21-crown-7

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From extraction experiments and g-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq) + CsL+(nb) Û ML+(nb) + Cs+(aq) taking place in the two-phase water-nitrobenzene system (M+ = NH, K+, Rb+, Tl+; L = dibenzo-21-crown-7; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Further, the stability constants of the ML+ complexes in water saturated nitrobenzene were calculated; they were found to increase in the order Cs+<K+ = Rb+»NH<Tl+.

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Authors and Affiliations

  1. Faculty of Applied Sciences, University of West Bohemia, Husova 11, 306 14 Pilsen, Czech Republic

    E. Makrlík

  2. Prague Institute of Chemical Technology, Technická 5, 166 28 Prague, Czech Republic

    P. Vaňura

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  1. E. Makrlík
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  2. P. Vaňura
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Makrlík, E., Vaňura, P. Extraction of NH4+, K+, Rb+ and Tl+ into nitrobenzene using cesium dicarbollylcobaltate in the presence of dibenzo-21-crown-7. J Radioanal Nucl Chem 269, 213–215 (2006). https://doi.org/10.1007/s10967-006-0253-z

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  • DOI: https://doi.org/10.1007/s10967-006-0253-z

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