Equilibrium and structure of deprotonated bis(glycylglycinato)-copper(II) in aqueous solution.

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概要

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• Potentiometric titration was carried out at 25.0±0.1 °C and at an ionic strength of 1.00 mol dm<SUP>−3</SUP> in sodium perchlorate for a system of copper(II)–dipeptide(A)–a second ligand(B) in an aqueous solution to obtain the formation constants of mixed ligand complexes Cu<I><SUB>p</SUB></I>H<I><SUB>q</SUB></I>A<I><SUB>r</SUB></I>B<I><SUB>s</SUB></I>. A was glycylglycine or glycinamide, and B was ethylamine or 2-aminoethanol. The structure of CuH<SUB>−1</SUB>A<SUB>2</SUB> in solution is discussed. It was found that the ligand A acts as a unidentate ligand and the other deprotonated H<SUB>−1</SUB>A as a terdentate one for the most part; only about 2% of this complex are in a bidentate-bidentate form.

• 公益社団法人 日本化学会の論文

著者

• Nakasuka Noriyuki

  Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University

• Kajiura Hiroko

  Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University

• Makimura Kenya

  Laboratory of Analytical Chemistry, Faculty of Science, Nagoya University

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• Equilibrium and structure of deprotonated bis(glycylglycinato)-copper(II) in aqueous solution.

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