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Structure determination of zinc iodide complexes formed in aqueous solution

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Abstract

Structures of the complexes formed in aqueous solutions between zinc(II) and iodide ions have been determined from large-angle X-ray scattering, Raman and far-IR measurements. The coordination in the hydrated Zn2+ hexaaqua ion and the first iodide complex, [ZnI]+, is octahedral, but is changed into tetrahedral in the higher complexes, [ZnI2(H2O)2], [ZnI3(H2O)]− and [ZnI4]2−. The Zn-I bond length is 2.635(4)Å in the [ZnI4]2− ion and slightly shorter, 2.592(6)Å, in the two lower tetrahedral complexes. In the octahedral [ZnI(H2O)5]+ complex the Zn-I bond length is 2.90(1)Å. The Zn-O bonding distances in the complexes are approximately the same as that in the hydrated Zn2+ ion, 2.10(1)Å.

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Author notes

  1. Georg Johansson

    Present address: Department of Inorganic Chemistry, Royal Institute of Technology, S-100 44, Stockholm, Sweden

Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Fukuoka University, Jonan-ku, 814-01, Fukuoka, Japan

    Hisanobu Wakita, Magnus Sandström & Hitoshi Ohtaki

  2. Coordination Chemistry Laboratories, Institute for Molecular Science, 444, Myodaiji, Okazaki, Japan

    Georg Johansson & Hitoshi Ohtaki

  3. Department of Inorganic Chemistry, Royal Institute of Technology, S-100 44, Stockholm, Sweden

    Magnus Sandström

  4. School of Chemistry, The University, BS8 1TS, Bristol, U.K.

    Peter L. Goggin

Authors
  1. Hisanobu Wakita
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  2. Georg Johansson
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  3. Magnus Sandström
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  4. Peter L. Goggin
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  5. Hitoshi Ohtaki
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Wakita, H., Johansson, G., Sandström, M. et al. Structure determination of zinc iodide complexes formed in aqueous solution. J Solution Chem 20, 643–668 (1991). https://doi.org/10.1007/BF00650714

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  • DOI: https://doi.org/10.1007/BF00650714

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