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Stability Constants of Some Univalent Cation Complexes of 2,3-Naphtho-15-crown-5 in Nitrobenzene Saturated with Water

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Abstract

The extraction of micro amounts of cesium by nitrobenzene solutions of sodium, potassium and rubidium dicarbollylcobaltates (M+B−;M+=Na+,K+,Rb+) has been investigated in the presence of 2,3-naphtho-15-crown-5 (N15C5, L). The equilibrium data were explained by assuming that ML+ and ML +2 complexes (M+=Na+,K+,Rb+, Cs+; L=N15C5) were present in the organic phase. The stability constants of the complex species ML+ and ML +2 have been determined in nitrobenzene saturated with water. It was found that the stability of the complex cation ML+ (where M+=Na+,K+,Rb+, Cs+; L=N15C5) in water-saturated nitrobenzene solutions increases along the series Cs+<Rb+<K+<Na+, whereas that of the species ML +2 in the same medium increases in the order Cs+<Rb+<Na+<K+.

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

    P. Vaňura

  3. Nuclear Research Institute, 250 68, Řež, Czech Republic

    P. Selucký

Authors
  1. E. Makrlík
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  2. P. Vaňura
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  3. P. Selucký
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Correspondence to E. Makrlík.

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Makrlík, E., Vaňura, P. & Selucký, P. Stability Constants of Some Univalent Cation Complexes of 2,3-Naphtho-15-crown-5 in Nitrobenzene Saturated with Water. J Solution Chem 38, 1129–1138 (2009). https://doi.org/10.1007/s10953-009-9434-z

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