Stability of the 15-crown-5-sodium complex in water saturated nitrobenzene |
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| Authors: | E Makrlík P Vaňura |
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| Institution: | (1) Faculty of Education, Charles University, 116 39 Prague, Czech Republic;(2) Prague Institute of Chemical Technology, 166 28 Prague, Czech Republic;(3) Kremličkova 964, 280 00 Kolín II, Czech Republic;(4) Present address: 341 42 Kolinec 250, Czech Republic |
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| Abstract: | From extraction experiments with22Na as a tracer, the extraction constant corresponding to the equilibrium Ba2+(aq)+2NaL+(nb)⇄ ⇄BaL2
2+(nb)+2Na+(aq) taking place in the two-phase water-nitrobenzene system (L=15-crown-5; aq=aqueous phase, nb=nitrobenzene phase) was evaluated
as logK
ex
(Ba2+,2NaL+)=3.3±0.1. Further, the stability constant of the complex BaL2
2+ in nitrobenzene saturated with water was calculated: log βnh(BaL
2
2+
)=16.4±0.1. |
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| Keywords: | |
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