대한화학회지 (Journal of the Korean Chemical Society)

  • 제31권5호
  • /
  • Pages.434-443
  • /
  • 1987
  • /
  • 1017-2548(pISSN)
  • /
  • 2234-8530(eISSN)
대한화학회 (Korean Chemical Society)
권호 표지

전이금속 착물들의 합성 및 결정구조 연구 (제 1 보) EDTA 와 IMDA 복합 킬레이트가 란탄족 원소들 (La, Nd, Gd, Ho, Yb)의 안정도 상수에 미치는 영향

Studies on the Synthesis and Structure of Macrocyclic Complexes for Transition Metals. (Part 1) Effects of Stability Constant on the Co-formation of Mixed Chelates (EDTA and IMDA) with Lanthanon (La, Nd, Gd, Ho, Yb)

  • 하영구 (서울대학교 자연과학대학 화학과) ;
  • 김은연 (서울대학교 자연과학대학 화학과) ;
  • 최규원 (서울대학교 자연과학대학 화학과) ;
  • 김하석 (서울대학교 자연과학대학 화학과)
  • Young-Gu Ha (Department of Chemistry, College of Natural Sciences, Seoul National University) ;
  • E. Y. Kim (Department of Chemistry, College of Natural Sciences, Seoul National University) ;
  • Q. Won Choi (Department of Chemistry, College of Natural Sciences, Seoul National University) ;
  • Hasuck Kim (Department of Chemistry, College of Natural Sciences, Seoul National University)
  • 발행 : 1987.10.20
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초록

Ln-EDTA 1 : 1 착물과 IMDA 사이의 착물형성에 대한 안정도 상수들을 이온세기 ${\mu}$ = 0.1, KNO$_3$와 20.0${\pm}$0.2$^{\circ}$C에서 전위차 적정법으로 연구하였다. Ln(EDTA)(IMDA) 혼합리간드착물들에 비교적 큰 안정도 상수가 형성된다는 사실을 밝혔으며, Ln원소들의 원자번호에 대한 형성도상수들의 경향을 Ln원소의 배위수와 반지름의 바탕에서 고찰하였다.

The formation constants of the complexes between Ln-EDTA 1 : 1 complex and IMDA have been investigated by a potentiometric titration method at 20.0${\pm}$0.2 degree C and ${\mu}$ = 0.1 (KNO$_3$). Unusually large stability in Ln(EDTA) mixed ligand complexes was found. Trends in the formation constants vs. atomic number of the lanthanide metals were discussed on the basis of coordination number and ionic radius of the metals.

키워드

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