Summary
The formation constants of mixed-ligand complexes of cobalt(II) and nickel(II) with glycine, DL-α-alanine and DL-valine as primary ligands and imidazole as secondary ligand have been determined potentiometrically under physiological-like conditions (T=37°C and I=0.15 M KNO3). The proton association constants of the free ligands and the stability constants for binary systems involving the amino acids and imidazole were also determined under identical conditions, and the experimental pH-titration data were analysed using the computer SUPERQUAD program. The relative stability of the ternary complex as compared to that of the corresponding binary complexes has been quantitatively expressed in terms of Δ log K and log X values.
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References
W. Forsling,Acta Chem. Scand.,33A 641 (1979).
V. I. Dulova, A. L. Brezhe, A. P. Myagchenko, E. P. Artyukhova and I. R. Molchanova,Vapr. Khim. Technol.,59, 72 (1980).
M.-S. El-Ezaby, M. Rashad and N. M. Moussa,Polyhedron,2, 45 (1983).
P. C. Sinha, N. B. Nigam and M. N. Srivastava,Natl. Acad. Sci. Lett., India,6, 419 (1983).
P. Gans, A. Sabatini and A. Vacca,J. Chem. Soc., Dalton Trans., 1195 (1985).
A. Sabatini, A. Vacca and P. Gans,Talanta,21, 53, (1974); P. Gans, A. Sabatini and A. Vacca,Inorg. Chem. Acta,18 237 (1976); M. Micheloni, A. Sabatini and A. Vacca,Inorg. Chim. Acta,25 41 (1977).
C. N. Reilley, R. W. Schmid and F. Sadek,J. Chem. Educ.,36, 555 & 619 (1959).
H. M. Irving, M. G. Miles and L. D. Pettit,Anal. Chim. Acta,38, 475 (1967).
G. Berthon, P. M. May and D. R. Williams,J. Chem. Soc., Dalton Trans., 1433 (1978).
A. Vacca and A. Sabatini in D. J. Leggett (Ed.),Computational Methods for the Determination of Formation Constants, Plenum Press, New York, 1985.
C. W. Childs and D. D. Perrin,J. Chem. Soc. A, 1039 (1969).
M. S. Nair, M. Santappa and P. Natrajan,Indian J. Chem.,19A, 1106 (1980).
C. Tanford and W. S. Shore,J. Am. Chem. Soc.,75, 816 (1953).
H. M. Irving and L. D. Pettit,J. Chem. Soc., 1546 (1963).
E. V. Sklenskaya and M. Karapet'yants,Russ. J. Inorg. Chem.,11, 1102 (1966).
N. C. Li, J. M. White and Yoest,J. Am. Chem. Soc.,78, 5218 (1956).
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Khatoon, Z., Kabir-ud-Din Potentiometric studies on mixed-ligand complexes of cobalt(II) and nickel(II) with amino acids as primary ligands and imidazole as secondary ligand. Transition Met Chem 14, 34–38 (1989). https://doi.org/10.1007/BF01129755
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DOI: https://doi.org/10.1007/BF01129755