0162373 - UIACH-O 20020024 RIV HU eng J - Journal Article
Makrlík, E. - Vaňura, P. - Vobecký, Miloslav
Stability of dicyclohexyl-18-crown-6-hydrogen complex in nitrobenzene saturated with water.
Journal of Radioanalytical and Nuclear Chemistry. Roč. 253, č. 1 (2002), s. 165-166. ISSN 0236-5731. E-ISSN 1588-2780
Institutional research plan: CEZ:AV0Z4031919
Keywords : stability constant * dicyclohelxyl-18.crown-6
Subject RIV: CB - Analytical Chemistry, Separation
Impact factor: 0.502, year: 2002

From extraction experiments with 22Na as a tracer, the extraction constant corresponding to the equilibrium H+(aq)+NaL+(nb)HL+(nb)+Na+(aq) in the two-phase water-nitrobenzene systém (L = dicyclohexyl-18-crown-6; aq = aqueous phase, nb = nitrobenzene phase) was evaluated in the form log Kex(H+, NaL+) = 0.2. Further, the stability constant of the complex HL+ in nitrobenzene saturated with water was calculated for a temperature of 25 C: log βnb (HL+)=7.7.
Permanent Link: http://hdl.handle.net/11104/0001196