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
Werner, A., Ber., 47, 2171 (1914).
Broomhead, J. A., Dwyer, F. P., and Hogarth, J. W., Inorg. Synth., 6, 186 (1960).
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Barnes, G. T., Backhouse, J. R., Dwyer, F. P., and Gyarfas, E. C., J. Proc. Roy. Soc. New South Wales, 84, 151 (1956).
Dwyer, F. P., O'Dwyer, M. F., and Gyarfas, E. C., Nature, 167, 1036 (1951).
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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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DOI: https://doi.org/10.1038/211741a0
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