Stability of the valinomycin-rubidium complex in water saturated nitrobenzene

  • M. Daňková
  • E. Makrlík
  • P. Vaňura
Letter to the Editor


From the extraction experiments and γ-activity measurements, the extraction constant corresponding to the Rb+(aq)+CsL+(nb)⇆RbL+(nb)+Cs+(aq) equilibrium in the two-phase water-nitrobenzene system (L=valinomycin; aq=aqueous phase, nb=nitrobenzene phase) was evaluated in the form logKex (Rb+, CsL+)=0.9. Further, the stability constant of the valinomycin-rubidium complex in nitrobenzene saturated with water was calculated as log βnb(RbL+)=11.7.


Physical Chemistry Inorganic Chemistry Aqueous Phase Stability Constant Nitrobenzene 
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Copyright information

© Akadémiai Kiadó 1997

Authors and Affiliations

  • M. Daňková
    • 1
  • E. Makrlík
    • 2
  • P. Vaňura
    • 3
  1. 1.Kolín IICzech Republik
  2. 2.Faculty of EducationCharles UniversityPrague 1Czech Republik
  3. 3.Prague Institute of Chemical TechnologyPragueCzech Republik

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