On the Aquation of Dichloro Bis-(Ethylenediamine)-Chromium (III) Cation

Dichloro Bis-(Ethylenediamine)-Chromium (III) 양이온의 수화반응

  • Jung-Ui Hwang (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Jong-Jae Chung (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Soung-Oh Bek (Department of Chemistry, College of Natural Sciences, Kyungpook National University)
  • 황정의 (경북대학교 자연과학대학 화학과) ;
  • 정종재 (경북대학교 자연과학대학 화학과) ;
  • 백성오 (경북대학교 자연과학대학 화학과)
  • Published : 1984.04.20


Aquation reaction kinetics of $[Cr(en)_2Cl_2]^+$complex was carried by the electric conductivity method. Its temperature range was $15^{\circ}C$ to $30^{\circ}C$ and pressure was varied up to 2,000 bars. The reaction rate was increased with increasing temperature, but was reversed to increasing pressure. The activation volume(${\Delta}V^{\neq}$) was increased with increasing temperature and decreased with increasing pressure. At $25^{\circ}C$ and 1 bar it was fairly small positive value, $1.82cm^2/mole$. Activation entropy change(${\Delta}S^{\neq}$) $was calculated as small negative value,-9.019 eu, at $25^{\circ}C$ and 1bar. Referring to the thermodynamic parameters, it was estimated that aquation reaction was proceeded by the interchange-dissociation(Id) mechanism.



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