Effect of solvent upon competitive liquid-liquid extraction of alkali metal cations by isomeric dibenzo-16-crown-5-oxyacetic acids |
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| Authors: | Wladyslaw Walkowiak Eok-Giu Jeon Hwang Huh Richard A Bartsch |
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| Institution: | (1) Department of Chemistry and Biochemistry, Texas Tech University, 79409-1061 Lubbock, Texas, USA;(2) Present address: Institute of Inorganic Chemistry and Metallurgy of Rare Elements, Technical University of Wroclaw, 50-370 Wroclaw, Poland;(3) Present address: Department of Chemistry, Korea Military Academy, 130-09 Seoul, Korea;(4) Present address: Department of Chemistry, University of Ulsan, 690 Ulsan, Republic of Korea |
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| Abstract: | The selectivity and efficiency of competitive liquid-liquid extraction of alkali metal cations into organic solvents containingsym-(octyl)dibenzo-16-crown-5-oxyacetic acid (2) andsym-bis4(5)-tert-butylbenzo]-16-crown-5-oxyacetic acid (3) have been determined. Solvents examined include: dichloromethane, chloroform, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, benzene, toluene,p-xylene, chlorobenzene, 1,2-dichlorobenzene, and 1,2,3,4-tetrahydronaphthalene. The Na+/K+ and Na+/Li+ extraction ratios are highest in chloroform. The extraction selectivity is found to correlate with the diluent parameter (DP) of the organic solvent.This paper is dedicated to the memory of the late Dr C. J. Pedersen. |
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| Keywords: | Lipophilic crown ether carboxylic acids solvent extraction of alkali metal cations organic solvent variation in extraction |
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