Journal of Solution Chemistry

, Volume 20, Issue 7, pp 643–668 | Cite as

Structure determination of zinc iodide complexes formed in aqueous solution

  • Hisanobu Wakita
  • Georg Johansson
  • Magnus Sandström
  • Peter L. Goggin
  • Hitoshi Ohtaki


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.

Key words

Large angle X-ray diffraction Raman spectra far-IR spectra structure of zinc(II) iodide complexes hydration of zinc(II) ions 


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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Hisanobu Wakita
    • 1
  • Georg Johansson
    • 2
  • Magnus Sandström
    • 1
    • 3
  • Peter L. Goggin
    • 4
  • Hitoshi Ohtaki
    • 1
    • 2
  1. 1.Department of Chemistry, Faculty of ScienceFukuoka UniversityFukuokaJapan
  2. 2.Coordination Chemistry LaboratoriesInstitute for Molecular ScienceMyodaijiJapan
  3. 3.Department of Inorganic ChemistryRoyal Institute of TechnologyStockholmSweden
  4. 4.School of ChemistryThe UniversityBristolU.K.

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