Hydration to Benzo-15-crown-5, Benzo-18-crown-6 and the Benzo-18-crown-6-Potassium Ion Complex in the Low-Polar Organic Solvents
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概要
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The coextraction of water with benzo-15-crown-5 (B15C5), benzo-18-crown-6 (B18C6) and the B18C6-K^+ complex into seven low-polar solvents, i.e., carbon tetrachloride (CTC), chloroform (CF), dichloromethane (DCM), 1,2-dichloroethane (1,2-DCE), benzene (BZ), chlorobenzene (CB) and o-dichlorobenzene (o-DCB), has been investigated. The mean hydration number, n_<H2O>, of these solutes in the water-saturated organic solvents was determined. There is a trend that the n_<H2O> values for any solutes increase with increasing the water concentration in the solvents. Those of B18C6 and B15C5 converge at almost 0.8 for B18C6 and 0.4 - 0.5 for B15C5 in the solvents with the relatively high water concentration, i.e., CF, 1,2-DCE, DCM, and nitorobenzene (NB). The n_<H2O> value of B15C5 is about one-half of that of B18C6 for a given organic solvent. The dominant species of the B18C6-K^+ complex in these solvents is non-hydrated. From these results, the hydration equilibrium constants, K_<H2O>,o, in the organic solvents were estimated.
- The Japan Society for Analytical Chemistryの論文
- 2001-03-10
著者
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ANADA Takahisa
Department of Chemical Process and Environments, The University of Kitakyushu
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Kikuchi Yoichi
Laboratory Of Chemistry Faculty Of Education Iwate University
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Anada Takahisa
Department Of Chemical Process And Environments The University Of Kitakyushu
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ARAYASHIKI Yukiya
Laboratory of Chemistry, Faculty of Education, Iwate University
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ANADA Takahisa
Laboratory of Chemistry, Faculty of Education, Iwate University
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Arayashiki Yukiya
Laboratory Of Chemistry Faculty Of Education Iwate University
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Kikuchi Yoichi
Laboratory of Analytical Chemistry, Faculty of Science, Niigata University
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