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

Kim, Sun-Deuk (Department of Chemistry, Taegu University)
Kim, Jun-Kwang (Department of Chemistry, Taegu University)
Ko, Moon-Soo (Department of Chemistry, Taegu University)
Publication Information
Analytical Science and Technology / v.15, no.2, 2002 , pp. 135-141 More about this Journal
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.
Keywords
protonation constants; stability constants; potentiometry;
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1 D. A. Tomalia., U. S. Patent 4,631,337.
2 G. Costa, G. Mestroni, A Puxeddu and E. Reisenhofer, J. Chem. Soc. (A), 2870(1970).
3 T. H. Cheng, Y. M. Wang, W. T. Lee and G. C. Liu, Polyhedron, 19, 2027(2000).
4 I. Lukes, J. Kotek, P. Vojtisek and P. Hermann, Coord. Chem. Rev., 287(2001).
5 M. Kodama, E. Kimura and S. Yamaguchi, J. C. S. Dalton Trans., 2537(1980).
6 R. M. Izatt and J. Christensen, J. Progress in Maccrocyclic Chemistry, 1(1971).
7 M. Kodama and E. Kimura, J. C. S. Dalton Trans. 2356(1980).
8 H. Keypour, B Sedighi and A. Asadi, Tran. Met. Chem., 23, 7(1998).
9 C. Y. NG, R. J. Motekaitis and A. E. Martell, Inorg. Chem., 18(11), 2982(1979).
10 R. F. Lumb and A. E. Martell, J. Phys. Chem., 57, 690(1953).
11 J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorganic Chemistry, 4th Ed. 341(1990).
12 S. D. Kim, K. H. Jang and M. Y. Park, Analical. Science. 1(1), 46(1998).
13 J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorg anic Chemistry, 4th Ed., 449(1990).
14 A. Vacca, D. Arenare and P. Aaoletti, Inorg. Chem., 5(8), 1384(1966).
15 Y. S. Motekaitis, A. E. Martell and M. J.,Welchi, Inorg. Chem., 30, 2738(1991).
16 S. H. Lee and D. Kim, J. Bull. Kor. Chem. Soc., 19, 11(1998).
17 Y. M. Wang, C. S. Chung, J. M. Lo and Y. L. Wu, Polyhedron, 18, 1917(1999).
18 R. Morassi, F. Mani and L. Sacconi, Inorg. Chem., 12(6), 1246(1973).
19 J. A. Dean, Lange's Handbook of Chemistry, 14th Ed., 8.37-8.42(1992).
20 J. E. Huheey, E. A. Keiter and R. L. Keiter, Inorganic Chemistry, 4th Ed. 329(1990).