Abstract
The absorption of 5 cm−1 electromagnetic radiation by aqueous solutions of methyl, ethyl, n-, and isopropyl, sec-, iso-, and tert-butyl, and tert-amyl alcohols and ethylene glycol was measured within their solubility limits in water at 20°C. It was found that the observed nonadditivity of absorption (absorption deficit) is a qualitative measure of hydration of alcohols of two types: hydrophilic and hydrophobic. The possibility of distinguishing these effects by millimeter spectroscopy was demonstrated. Hydrophobic hydration makes the basic contribution to the hydration number of aliphatic alcohols. On the example of solutions of ethanol and tert-butanol, it was shown that hydrophobic hydration decreases with an increase in the temperature of the solution due to intensification of hydrophobic interactions between the hydrocarbon radicals.
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For previous communication, see [1].
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1755–1761, August, 1989.
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Zavizion, V.A., Kudryashova, V.A. & Khurgin, Y.I. Millimeter spectroscopic study of intermolecular interactions in solutions. Russ Chem Bull 38, 1606–1611 (1989). https://doi.org/10.1007/BF00956939
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DOI: https://doi.org/10.1007/BF00956939