Abstract
THE Liebermann-Burchard reaction1 is extensively used for the characterization of polynuclear compounds (steroids, polyterpenoids, etc.). Applying this reaction to some of these compounds and simpler ones, according to the conditions described by Nath, Chakravorty and Chowdhury2, with enough chloroform to give a homogeneous medium, colloidal solutions are obtained. With cholesterol, Î-amyrenol, abietic acid, limonene, cyclohexanone and linalool, the solutions are strongly coloured and show a strong Tyndall effect and Brownian movement by the ultramicroscope.
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References
Liebermann, C., Ber., 18, 1804 (1885). Burchard, O., Diss. Rostock (1899).
Nath, M. C., Chakravorty, M. K., and Chowdhury, S. R., Nature, 157, 103 (1946).
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COELHO, F., ALVES, F. Liebermann-Burchard Reaction. Nature 157, 803 (1946). https://doi.org/10.1038/157803a0
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DOI: https://doi.org/10.1038/157803a0
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