Structure and Chemical Reactivity of the Transition Metal Complexes (I). Synthesis and Geometrical Isomerism of the Ethylenediamine-triacetatocobalt (III) Complexes with Ammine or Diamines

전이금속착물의 구조와 그 반응성 (I). 암민류를 포함하는 Ethylenediamine-triacetatocobalt (III) 착물의 합성과 기하이성질현상

  • Dong-Jin Lee (Department of Chemistry, College of Science, Yeungnam University) ;
  • Bong-Gon Kim (Department of Science Education, Kyeongsang National University) ;
  • Myung-Ki Doh (Department of Chemistry, College of Science, Yeungnam University)
  • 이동진 (영남대학교 이과대학 화학과) ;
  • 김봉곤 (경상대학교 사범대학 화학교육과) ;
  • 도명기 (영남대학교 이과대학 화학과)
  • Published : 1985.10.20

Abstract

Ethylenediamine-triacetatocobalt (III) complexes with an ammine, an ethylene-diamine, and a trimethylenediamine as the unidentate ligand were prepared, and were isolated as only one isomer for each case by the Dowex 50W-X8, cation exchange resin in $H^+$ form. The geometrical isomer of these complexes have been assigned cis-equatorial form in the three possible geometrical isomers from the elemental analysis, pH titration, IR, NMR, and electronic absorption spectrum. It was found that $[CoN_3O_3]$ system of the meridional form with multidentate ligand have the first absorption band of the largely splitting pattern, and that the diamines (ethylenediamine, trimethylenediamine) have coordinated to the central cobalt (III) ion as a unidentate ligand.

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References

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