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Resolution of Oxalatobis (ethylenediamine)-cobalt(III) Bromide by a Preferential Induced Crystallization

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Abstract

THE resolution of oxalatbis(ethylenediamine)cobalt(III) bromide by way of the preferential crystallization of one optical enantiomorph was first demonstrated by Werner1. Seed crystals of optically active oxalatobis(ethylenediamine)cobalt(III) were added to a solution containing 2 g of the racemic compound. The subsequent addition of alcohol gave 0.2 g of dextro bromide in 95 per cent optical purity (sodium D-line rotations). A marked improvement of this resolution is reported here in which optically active tris(ethylenediamine)cobalt(III) acetate is used.

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References

  1. Werner, A., Ber., 47, 2171 (1914).

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  2. Broomhead, J. A., Dwyer, F. P., and Hogarth, J. W., Inorg. Synth., 6, 186 (1960).

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  5. Dwyer, F. P., O'Dwyer, M. F., and Gyarfas, E. C., Nature, 167, 1036 (1951).

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  1. J. A. BROOMHEAD

    Present address: Department of Chemistry, School of General Studies, Australian National University, Canberra

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  1. Department of Chemistry, University of Queensland, St. Lucia, Brisbane

    J. A. BROOMHEAD

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  1. J. A. BROOMHEAD
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BROOMHEAD, J. Resolution of Oxalatobis (ethylenediamine)-cobalt(III) Bromide by a Preferential Induced Crystallization. Nature 211, 741–742 (1966). https://doi.org/10.1038/211741a0

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