Abstract
ABNORMALLY large differences in solubility and volatility between isomers of some disubstituted benzene derivatives have been explained by Dr. N. V. Sidgwick as arising from the presence of chelate rings in the anomalous compounds. These rings are considered to be formed between ortho substituents and usually to contain six atoms, one of which is hydrogen situated between two oxygen atoms. The ease with which such rings can be ruptured has prevented a demonstration of the phenomenon by the usual methods of organic chemistry. In the course of a quantitative study of the infra-red absorption coefficients of a series of organic molecules, which is in progress in this laboratory1, an apparently specific behaviour has been found for this type of chelated compound.
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References
J. Amer. Chem. Soc., 55, 3574; 1933.
J. Chem. Soc., 123, 2819; 1923.
“The Electronic Theory of Valency” (London, 1929), p. 240.
Ref. 3, p. 245.
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HILBERT, G., WULF, O., HENDRICKS, S. et al. A Spectroscopic Method for Detecting some Forms of Chelation. Nature 135, 147–148 (1935). https://doi.org/10.1038/135147b0
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DOI: https://doi.org/10.1038/135147b0
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