Influence of added alcohols on the pfeiffer effect of tris-(1,10-phenanthroline)zinc(II)-l-malic acid and -d-tartaric acid systems in water.

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概要

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• Influence of lower alcohols (methanol to butanol) was examined on the Pfeiffer effect of the [Zn(phen)<SUB>3</SUB>]<SUP>2+</SUP>-<I>l</I>-malic acid and -<I>d</I>-tartaric acid systems in water at 25 °C (phen=1,10-phenanthroline). It was found that the Pfeiffer rotation α<SUB>p</SUB> decreases linearly with molar concentration <I>C</I><SUB>A</SUB> of added alcohols for both systems, and that the logarithm of the rate of the decrease in α<SUB>p</SUB> with <I>C</I><SUB>A</SUB> is a linear function of the number of methylene groups in added alcohol molecules. This is well interpreted on the assumption that added alcohol molecules adhere to [Zn(phen)<SUB>3</SUB>]<SUP>2+</SUP> ion, thereby preventing the complex and chiral acid from coming into contact with each other. The enthalpy change per methylene group on passing from the alcohol environment to the complex environment was estimated to be <I>ca.</I> 0.7 <I>RT</I>.

• 公益社団法人 日本化学会の論文

著者

• YONEDA Hayami

  Department of Chemistry, Faculty of Science, Hiroshima University

• Miyoshi Katsuhiko

  Department Of Chemistry Faculty Of Science Hiroshima University

• Kuroda Yasushige

  Department Of Chemistry Faculty Of Science Okayama University

• Isoe Yuji

  Department of Chemistry, Faculty of Science, Hiroshima University

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