A theoretical approach to the dielectric relaxation of alcohol solutions. II. The effect of dilution with inert solvents on the principal relaxation times of primary alcohols.

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概要

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• The concentration dependence of the principal relaxation times, τ<SUB>p</SUB>, of primary alcohol/inert solvent solutions are analyzed based on the equation,<BR>τ<SUB>p</SUB>=2(1+<I>Kx</I><SUB>A</SUB>)τ<SUB>H</SUB>,<BR>where <I>x</I><SUB>A</SUB> is the alcohol mole fraction, <I>K</I> the equilibrium constant corresponding to the formation of hydrogen bonded multimers, and τ<SUB>H</SUB> the time constant characterizing the rotational activation process of the terminal OH groups of the multimers. By applying Eyring’s absolute rate theory to the activation process, we calculated τ<SUB>P</SUB> as a function of temperature and alcohol concentration. The results reproduce quite well the τ<SUB>P</SUB> values observed for the ethanol/cyclohexane, 1-hexanol/cyclohexane, and 1-propanol/benzene solutions.

著者

• Minami Ryuichi

  Department Of Chemistry School Of Science And Engineering Waseda University:(present Address) Depart

• Takahashi Hiroaki

  Department Of Biochemistry And Molecular Biology Graduate School Of Science And Engineering Saitama

• Itoh Koichi

  Department of Applied Chemistry, Graduate School of Engineering, Nagoya University

• Higasi Keniti

  Department of Chemistry, School of Science and Engineering, Waseda University

• Takahashi Hiroaki

  Department of Chemistry, School of Science and Engineering, Waseda University

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