Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
권호 표지

Synthesis of Tridentate Poly-amine Ligands and Determination of Stability Constants of Transition Metal Complexes

세자리 폴리아민리간드의 합성과 양성자 해리상수 및 전이금속과의 착물 안정도상수의 결정

  • 김선덕 (대구대학교 자연과학대학 화학과) ;
  • 김준광 (대구대학교 자연과학대학 화학과) ;
  • 고문수 (대구대학교 자연과학대학 화학과)
  • Received : 2002.02.01
  • Published : 2002.04.25
Download PDF
⟨ Previous Next ⟩

Abstract

The new tridentate poly-amine ligands, N,N-Bis(2-amino-ethyl)-methyl amine${\cdot}$2HBr (BAMA${\cdot}$2HBr), N,N-Bis(2-amino-ethyl)-ethylamine${\cdot}$2HBr (BAEA${\cdot}$2HBr), N,N-Bis(2-amino-ethyl)-propylamine${\cdot}$2HBr (BAPA${\cdot}$2HBr) and N,N-Bis(2-amino-ethyl)-butylamine${\cdot}$2HBr (BABA${\cdot}$2HBr) were synthesized as their dihydrobromic-salt and characterized by EA, IR, NMR and Mass spectroscopy. The protonation constants of the ligands and stability constants of transition metal(II) complexes were determined in aqueous solutions by potentiometry and compared with diethylenetriamine. Stability constants for transition metal complexes of ligands are in the order of BAMA < BAEA < BAPA > BABA. The larger value of stability constants of BAPA compared to these BABA, may be attributed to the more distorted structure of the complex due to the increased steric crowding caused by the presence of the bulky N-butyl group.

새로운 세자리 폴리아민 리간드 N,N-Bis(2-amino-ethyl)-methylamine${\cdot}$2HBr(BAMA${\cdot}$2HBr), N,N-Bis(2-amino-ethyl)-ethylamine${\cdot}$2HBr (BAEA${\cdot}$2HBr), N,N-Bis-(2-amino-ethyl)-propylamine${\cdot}$2HBr (BAPA${\cdot}$2HBr), N,N-Bis(2-amino-ethyl)-butylamine${\cdot}$2HBr (BABA${\cdot}$2HBr)을 두 개의 브롬산염으로 합성하여 원소분석, 적외선 분광법, 핵자기공명법 및 질량스펙트럼으로 합성을 확인하였다. 리간드들의 양성자 해리상수와 전이금속(II) 착물의 안정도상수를 수용액에서 전위차 적정법으로 측정하여 diethylenetriamine의 값과 비교하였다. 리간드별 전이금속(II)과 안정도상수의 크기는 BAMA < BAEA < BAPA > BABA순으로 증가하였다. BAPA가 BABA보다 안정도상수가 큰 이유는 BABA 내 부피가 큰 butyl 기에 의해 분자내의 입체장애를 증가시킨 것이다.

Keywords

References

  1. S. D. Kim, K. H. Jang and M. Y. Park, Analical. Science. 1(1), 46(1998).
  2. J. A. Dean, Lange's Handbook of Chemistry, 14th Ed., 8.37-8.42(1992).
  3. A. Vacca, D. Arenare and P. Aaoletti, Inorg. Chem., 5(8), 1384(1966).
  4. C. Y. NG, R. J. Motekaitis and A. E. Martell, Inorg. Chem., 18(11), 2982(1979).
  5. H. Keypour, B Sedighi and A. Asadi, Tran. Met. Chem., 23, 7(1998).
  6. D. A. Tomalia., U. S. Patent 4,631,337.
  7. S. H. Lee and D. Kim, J. Bull. Kor. Chem. Soc., 19, 11(1998).
  8. Y. S. Motekaitis, A. E. Martell and M. J.,Welchi, Inorg. Chem., 30, 2738(1991).
  9. G. Costa, G. Mestroni, A Puxeddu and E. Reisenhofer, J. Chem. Soc. (A), 2870(1970).
  10. J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorganic Chemistry, 4th Ed. 329(1990).
  11. Y. M. Wang, C. S. Chung, J. M. Lo and Y. L. Wu, Polyhedron, 18, 1917(1999).
  12. R. Morassi, F. Mani and L. Sacconi, Inorg. Chem., 12(6), 1246(1973).
  13. T. H. Cheng, Y. M. Wang, W. T. Lee and G. C. Liu, Polyhedron, 19, 2027(2000).
  14. I. Lukes, J. Kotek, P. Vojtisek and P. Hermann, Coord. Chem. Rev., 287(2001).
  15. M. Kodama, E. Kimura and S. Yamaguchi, J. C. S. Dalton Trans., 2537(1980).
  16. J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorganic Chemistry, 4th Ed. 341(1990).
  17. R. F. Lumb and A. E. Martell, J. Phys. Chem., 57, 690(1953).
  18. R. M. Izatt and J. Christensen, J. Progress in Maccrocyclic Chemistry, 1(1971).
  19. M. Kodama and E. Kimura, J. C. S. Dalton Trans. 2356(1980).
  20. J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorg anic Chemistry, 4th Ed., 449(1990).