Articles you may be interested inAcceleration of the effect of solute on the entropy-volume cross fluctuation density in aqueous 2-butoxyethanol, 1-propanol, and glycerol: The fourth derivative of Gibbs energy Surface properties of diluted aqueous solutions of solutes containing isopropyl hydrophobic groupThe surface tension of aqueous solutions of normal alcohols ͑from methanol to n-butanol͒ was measured in the temperature range between 278 and 303 K using the Wilhelmy plate method. The surface entropies are calculated. The results are interpreted in terms of specific interactions of the hydrophobic parts of the molecules adsorbed at the interface. It is concluded that increasing surface concentration of alcohol molecules causes their rearrangement at the surface, similar to phase transition. This process depends on the symmetry of molecules.

Computer experiments on aqueous solutions. VI. Potential energy function for tertbutyl alcohol dimer and molecular dynamics calculation of 3 mol% aqueous solution of tertbutyl alcohol J. Chem. Phys. 81, 4065 (1984); 10.1063/1.448150Ultrasonic absorption in binary solutions of pyridine with tertbutyl alcohol and phenol Surface tension of aqueous solutions of tert-butyl alcohol ͑2-methyl-2-propanol͒ was measured in the temperature range between 278 and 303 K using Wilhelmy plate method. The surface entropies and enthalpies are calculated. The results are interpreted in terms of changing structure of solution, especially formation of clathratelike hydrates.

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The results of positron lifetime and ultrasonic velocity measurements in dilute aqueous dimethylsulfoxide (DMSO) solutions show the usual extreme characteristic for polar organic solutes. The results obtained suggest that strong structural changes occur in the system, in the region of low DMSO concentrations. Liquid clathrate hydrates forming in the systeni are supposed, with unusual stoichiometry and untypical geometry of the hydrates.PACS numbers: 61.25. Em, 78.70.Bj It is a well established fact now that the thermodynamic properties of aqueous solutions of apolar compounds or molecules having both polar and polar components (polar organic molecules) at low concentrations are predominantly determined by hydrophobic interactions which result in an enhancement of water structure. The stabilization of water stucture also gets support by NMR [1] and infrared spectroscopy [2], by X-ray diffractions [3] as well as by studies on molecular dynamics [4].Because of the fact that many of these organic compounds form clathrate hydrates in the solid state, attempts to explain the characteristic behaviour of liquid solutions in terms of clathrate-like structures seem to be more legitimate than interpretations based on other concepts.