Structure of Ni(II)? and Zn(II)?Glycinato Complexes in Aqueous Solution Determined by EXAFS Spectroscopy

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概要

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• The EXAFS spectroscopy has been used to determine the structure of the bis(glycinato) complexes of nickel(II) and zinc(II) ions of low solubility (0.1–0.3 mol dm<SUP>−3</SUP>) in aqueous solution. The structural parameters were evaluated by the least-squares analysis both in the reciprocal and in the real spaces on the basis of various standard samples of known structures. Analysis of the EXAFS spectra of aqueous solutions containing the bis(glycinato) complexes of nickel(II) and zinc(II) ions has revealed that both complexes have two additional water molecules bound to the central metal ions to complete the octahedral structure. The structure of the nickel(II) complex is similar both in crystals and in solution, whereas the bis(glycinato)zinc(II) in solution is coordinated with two water molecules instead of two neighboring glycinato carbonyl oxygen atoms in the solid state.

著者

• Tohji Kazuyuki

  Institute For Molecular Science

• Udagawa Yasuo

  Institute For Molecular Science

• Ohtaki Hitoshi

  Department Of Chemistry Faculty Of Science And Engineering Ritsumeikan University

• Yamaguchi Toshio

  Department Of Chemistry Faculty Of Science Fukuoka University

• Ozutsumi Kazuhiko

  Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University

• Ohtaki Hitoshi

  Department of Electronic Chemistry, Tokyo Institute of Technology at Nagatsuta

• Ozutsumi Kazuhiko

  Department of Electronic Chemistry, Tokyo Institute of Technology at Nagatsuta

• Yamaguchi Toshio

  Department of Electronic Chemistry, Tokyo Institute of Technology at Nagatsuta

• Yamaguchi Toshio

  Department of Chemical Engineering, Tokyo University of Agriculture and Technology

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