Letter | Published:

Colour of Iodine Solutions

Nature volume 160, page 87 (19 July 1947) | Download Citation

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Abstract

The dependence of the colour of iodine solutions upon the nature of the solvent is generally believed to be due to the presence of loosely bound iodine-solvent complexes, or ‘solvates’, in the brown solutions (for example, in ethanol) and of ‘unsolvated’ diatomic iodine molecules in the violet solutions (for example, in carbon tetrachloride)1. The nature, however, of this ‘solvation’ remains obscure. It is obviously not a simple electrostatic solvation, for it has little to do with the dielectric constant of the solvent; nor would such a solvation serve to account for the marked difference in chemical properties between the violet and brown solutions.

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References

  1. 1.

    , J. Amer. Chem. Soc., 25, 50 (1903).

  2. 2.

    and , Proc. Roy. Soc., A, 132, 152 (1931).

  3. 3.

    , Trans. Farad. Soc., 29, 1132 (1933).

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Author information

Affiliations

  1. Department of Chemistry, University, Manchester 13. May 20.

    • F. FAIRBROTHER

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DOI

https://doi.org/10.1038/160087a0

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