The Substitution Mechanism of $[CoCl(Hedta)]^-$ ion by Ethylenediamine in the Presence of $Hg^{2+}$ ion

$Hg^{2+}$이온의 존재하에서 $[CoCl(Hedta)]^-$ 이온에 대한 에틸렌디아민과의 치환반응기구에 관한 연구

  • Sang-Mock Lee (Department of Chemistry, Yeungnam University) ;
  • Dong-Jin Lee (Department of Chemistry, Yeungnam University) ;
  • Myung-Ki Doh (Department of Chemistry, Yeungnam University)
  • 이상목 (영남대학교 이과대학 화학과) ;
  • 이동진 (영남대학교 이과대학 화학과) ;
  • 도명기 (영남대학교 이과대학 화학과)
  • Published : 1987.12.20

Abstract

The study of reaction mechanism for the substitution of ethylenediamine (en) for Cl and Hedta from $[CoCl(Hedta)]^-$ in the presence of $Hg^{2+}$ ion was carried out by uv and CD spectra. From the kinetic data, we proposed that the first ethylenediamine be substituted through the associative reaction path by means of interaction of $Hg^{2+}$ ion with Co(III), and that the second and the third ethylenediamine be substituted stepwise. From the optical purities of $[Co(en)_3]^{3+}$ which was formed after reaction, we suggested the critical stereochemical step and new substitution reaction paths.

Keywords

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