An X-ray diffraction study on zinc(II) complexes with .ALPHA.-alaninate ion in aqueous solution.

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概要

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• The structures of mono(α-alaninato)zinc(Il), bis(α-alaninato)zinc(II), and tris(α-alaninato)zincate(II) complexes in aqueous solutions were determined by the X-ray diffraction method. All the three complexes have the octahedral structure in the form [Zn(α-ala)(H<SUB>2</SUB>O)<SUB>4</SUB>]<SUP>+</SUP>, [Zn(α-ala)<SUB>2</SUB>(H<SUB>2</SUB>O)<SUB>2</SUB>], and [Zn(α-ala)<SUB>3</SUB>]<SUP>−</SUP>. The structures of the complexes were different from those of the glycinato complexes of zinc(II) ion, which were all regular octahedral. The length of the Zn–O bond in the α-alaninato complexes was shorter than that of the Zn–N bond due to the inductive effect of the substituted methyl group at the α-carbon on the oxygen atom in the amino acid. The lengths of the Zn–O and Zn–N bonds in the complexes determined are, respectively, as follows: [Zn(α-ala)(H<SUB>2</SUB>O)<SUB>4</SUB>]<SUP>+</SUP>, 202 and 214 pm; [Zn(α-ala)<SUB>2</SUB>(H<SUB>2</SUB>O)<SUB>2</SUB>], 203 and 214 pm; [Zn(α-ala)<SUB>3</SUB>]<SUP>−</SUP>, 202 and 213 pm.

• 公益社団法人 日本化学会の論文

著者

• Ohtaki Hitoshi

  Coordination Chemistry Laboratories Institute For Molecular Science

• INOUE Kenta

  Department of Electrical, Electronic and Information Engineering, Osaka University

• Radnai Tamas

  Department of Electronic Chemistry, Tokyo Institute of Technology at Nagatsuta

• Inoue Kenta

  Department of Electronic Chemistry, Tokyo Institute of Technology at Nagatsuta

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• An X-ray diffraction study on zinc(II) complexes with .ALPHA.-alaninate ion in aqueous solution.

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