Dissociation of Complex Ions in Non-Aqueous Solvents


WE have developed recently1 a method for the micro colorimetric estimation of iron as triphenyl-methylarsonium hexathiocyanato ferrate III, (Ph3MeAs)3(Fe(CNS)6), in which this compound was extracted from aqueous solution with o-dichlorbenzene in the presence of about seventy equivalents of tri-phenylmethylarsonium thiocyanate. The orange-red solution had a sharp absorption maximum at 478 mμ. (curve A), the same wave-length as that observed by Woods and Mellon2 for the ammonium salt (NH4)3(Fe(CNS)6) in water.

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  1. 1

    Dwyer, F. P., and Gibson, N. A., (unpublished work).

  2. 2

    Woods, J. T., and Mellon, M. G., Intdust. and Eng. Chem. (Anal. Ed.), 13, 551 (1941).

  3. 3

    Bjerrum, J., Chem. Rev., 46, 381 (1950).

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DWYER, F., GIBSON, N. Dissociation of Complex Ions in Non-Aqueous Solvents. Nature 168, 787–788 (1951). https://doi.org/10.1038/168787a0

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