Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Stability Studies of Divalent and Trivalent Metal Complexes with 1,7,13-Trioxa-4,10,16-triazacyclooctadecane-N,$N^{\prime},N^{\prime}^{\prime}$-tri(methylacetic acid)

  • Published : 1997.11.20
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Abstract

The potentiometric methods have been used to determined the protonation constants (logKiH) for the synthesized 1,7,13-trioxa-4,10,16-triazacyclooctadecane-N,N',N''-tri(methylacetic acid) [N3O3-tri(methylacetic acid)] and the stability constants (logKML) of the complexes of divalent and trivalent metal ions with the ligand N3O3-tri(methylacetic acid). The protonation constants of N3O3-tri(methylacetic acid) were 9.70 for logK1H, 9.18 for logK2H, 7.27 for logK3H, 3.38 for logK4H, and 2.94 for logK5H. The stability constants for the complexes of divalent metal ions with N3O3-tri(methylacetic acid) were 10.39 for Co2+, 10.68 for Ni2+, 13.45 for Cu2+, and 13.00 for Zn2+. The order of the stability constants for the complexes of the divalent metal ions with N3O3-tri(methylacetic acid) was Co2+ < Ni2+ < Zn2+ < Cu2+. The stability constants for the complexes of trivalent metal ions with N3O3-tri(methylacetic acid) were 16.20 for Ce3+, 16.40 for Eu3+, 16.27 for Gd3+, and 15.80 for Yb3+. The results obtained in this study were compared to those obtained for similar ligands, 1,7-dioxa-4,10,13-triazacyclopentadecane-N,N',N"-tri(methylacetic acid) and 1,7,13-trioxa-4,10,16-triazacyclooctadecane-N,N',N"-triacetic acid, which have been previously reported.

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References

  1. The Environmental Chemistry and Toxicology of Aluminum Martell, A. E.;Motekaitis, R. J.;Lewis, T. E.(ed.)
  2. Biochem. Biophys. Res. Commun v.15 Moore, C.;Pressman, B. C.
  3. Chem. Rev. v.89 Krakowiak, K. E.;Bradshaw, J. S.;Zameka-Krakowiak, D. I.
  4. Chem. Rev. Lauffer, R. C.
  5. J. Chem. Soc. Commun. Riesen, A.;Kaden, T. A.;Ritter, W.;Macke, H. R.
  6. J. Am. Chem. Soc. v.107 Schultz, R. A.;White, B. D.;Dishong, D. M.;Amold, K. A.;Gokel, G. W.
  7. Tetrahedron Lett. v.28 White, B. D.;Arnold, K. A.;Gokel, G. W.
  8. Inorg. Chem. v.32 Delagado, R.;Ranumas, Y. S.;Motekaitis, J.;Martell, A. E.
  9. Inorg. Chem. Acta v.181 Clarke, E. T.;Martell, A. E.
  10. Nippon Kagaku Kaishi v.7 Hama, H.;Takamoto, S.
  11. Bull. Korean Chem. Soc. v.17 Kim, D. W.;Hong, C. P.(et al.)
  12. Complexometric Titration Schwarzenbach, G.;Flaschka, H.
  13. J. Org. Chem. v.40 Kresp$\`{a}$n, C. G.
  14. J. Chem. Soc., Dalton Trans. Amorim, M. T. S.;Ascenso, J. R.;Delgado, R.;Frausto da Silva, J. J. R.
  15. J. Chem. Soc., Perkin Trans. 2 Broan, C. J.;Cox, J. P. L.;Craig, A. S.;Kataky, R.;Parker, D.;Harrison, A.;Randall, A. M.;Ferguson, G.
  16. Tetrahedron v.47 Sun, Y.;Martell, A. E.;Welch, M.
  17. Determination and Use of Stability Constants(2nd Ed.) Martell, A. E.;Motekaitis, R. J.
  18. Talanta v.35 Amorim, M. T. S.;Delgado, R.;Frausto da Silva J. J. R.;Vaz, M. C. T. A.;Vilhena, M. F.
  19. J. Chem. Soc. Irving, H.;Williams, R. J. P.
  20. J. Chem. Educ. v.47 Moeller, T.