Abstract
THE absorption spectra of salts of trivalent chromium are characterised by exceedingly narrow bands in the red part of the spectrum. Their presence in the spectra of co-ordination compounds of chromium was discovered by Lapraik1 in 1890, whose work is the more remarkable for being completed prior to Werner's theory of co-ordination valency and therefore at a time when the peculiar structure of the compounds was unknown.
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References
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Johnson, Trans. Far. Soc., 28, 845; 1932.
Freed and Spedding, Phys. Rev., 34, 945; 1929.
J. Amer. Chem. Soc., 53, 1367; 1931.
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JOHNSON, C., MEAD, A. Line Absorption of Chromic Salts in Relation to Co-ordination. Nature 131, 399 (1933). https://doi.org/10.1038/131399a0
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DOI: https://doi.org/10.1038/131399a0
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