Salt effect on the solubility of copper and beryllium chelates of 4,4,4-trifluoro-1-phenyl-1,3-butanedione.

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概要

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• In order to examine whether the substitution of a trifluoromethyl group for a methyl group in metal chelates of 1-phenyl-1,3-butanedione (BA) affects the salt effect on the solubility of these chelates, the solubility of copper and beryllium chelates of 4,4,4-trifluoro-1-phenyl-1,3-butanedione (BFA) in water and in some aqueous salt solutions was measured at 25 °C. The solubility in water (<I>S</I><SUB>0</SUB>) was 9.07±0.22×10<SUP>−7</SUP> mol dm<SUP>−3</SUP> for the copper chelate and 4.85±0.08×10<SUP>−6</SUP> mol dm<SUP>−3</SUP> for the beryllium chelate. These solubility values are compared with those of the corresponding BA chelates and an influence of fluorination on the solubility of these BA chelates is discussed. It was found that the solubility of the above BFA chelates in the aqueous salt solutions (<I>S</I>) could be expressed satisfactorily by the equation, log(<I>S</I><SUB>0</SUB>⁄<I>S</I>)=<I>a</I>\sqrt<I>C</I><SUB>s</SUB>+<I>bC</I><SUB>s</SUB>, where <I>C</I><SUB>s</SUB> is the concentration of salt. This result suggests that introduction of CF<SUB>3</SUB> group brings about a specific interaction between the fluorinated chelates and their surroundings.

• 公益社団法人 日本化学会の論文

著者

• Yoshimura Yasuki

  Laboratory Of Chemistry Faculty Of Humanities And Social Sciences Iwate University

• Sato Nobuyoshi

  Laboratory of Chemistry, College of Humanities and Social Sciences, Iwate University

• Kikuchi Makoto

  Laboratory of Chemistry, College of Humanities and Social Sciences, Iwate University

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• Solubility Differences among Geometric and Optical Isomers of Tris (amino acidato)cobalt(III)
• The Role of Activated α-Carbon Atom Hydrogen in Salting-in Effect on Tris(α-amino acidato)cobalt(III)
• Partial molar enthalpy of solution for tris(2,4-pentanedionato)cobalt(III) in mixed solvents of water and dimethyl sulfoxide.
• Salt effect on the solubility of copper and beryllium chelates of 4,4,4-trifluoro-1-phenyl-1,3-butanedione.

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