Stability of complexes of alkali metal cations with dicyclohexano-24-crown-8 in nitrobenzene saturated with water

  • E. Makrlík
  • P. Vaňura


From extraction experiments and g-activity measurements, the exchange extraction constants corresponding to the general equilibrium M+(aq)+NaL+(nb)ÛML+(nb)+Na+(aq) taking place in the two-phase water-nitrobenzene system (M+ = Li+, K+, Rb+, Cs+; L = dicyclohexano-24-crown-8; aq = aqueous phase, nb = nitrobenzene phase) were evaluated. Furthermore, the stability constants of the ML+ complexes in water saturated nitrobenzene were calculated. They were found to increase in the cation order of Cs+<Rb+<K+<Li+<Na+.


Stability Constant Nitrobenzene Alkali Metal Cation Nitrobenzene Solution Nitrobenzene Phase 
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Copyright information

© Springer-Verlag/Akadémiai Kiadó 2006

Authors and Affiliations

  • E. Makrlík
    • 1
  • P. Vaňura
    • 2
  1. 1.Faculty of Applied Sciences, University of West Bohemia
  2. 2.Prague Institute of Chemical Technology

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