S. Nishikawa, Masayuki Ueda
Apr 1, 1991
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0
Influential Citations
3
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
3-Methoxy-1-propanol and 3-ethoxy-1-propanol were synthesized through potassium propoxide from 1,3-propanediol. Ultrasonic absorptions in their aqueous solutions were measured in the frequency range from 8.5 to 220 MHz as functions of their concentrations along with the sound velocity and density. In a solution of 3-ethoxy-1-propanol, a single relaxational absorption was observed; the cause was attributed to a perturbation of an equilibrium as AB ↔ A + B, where AB represents the solute-solvent complex, A the solute and B the solvent molecules. On the other hand, no relaxational absorption was observed in a 3-methoxy-1-propanol solution up to 4 mol dm−3. The thermodynamic and the kinetic parameters were evaluated for the above-mentioned process from the concentration dependences of the ultrasonic parameters in a 3-ethoxy-1-propanol solution. From evidence concerning the appearance and disappearance of ultrasonic relaxational absorption and comparisons of the rate and thermodynamic constants in aqueous solu...