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E-Journal of Chemistry
Volume 8 (2011), S1, Pages S404-S408

Stability Constants of Mixed Ligand Complexes of Cu(II) and Ni(II) with Some Amino Acids and Phosphates

Aruna Adam,1 Suman Verma,2 and Gita Seth2

1B. B. D. Government College, Chimanpura, (Rajasthan), India
2Department of Chemistry, University of Rajasthan, Jaipur–302055, India

Received 2 February 2011; Accepted 13 April 2011

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The binary and ternary metal complexes of Cu(II) & Ni(II) with some amino acids (leucine, isoleucine & serine) as primary ligand and pyrophosphate (PP), adenosine-5´-triphosphate (ATP), as secondary ligand have been studied potentiometrically at 35 °C and a constant ionic strength (1.0 mol dm-3 KNO3). The formation of various binary and ternary complexes has been inferred from the corresponding titration curves. The Irving & Rossotti titration technique has been applied to determine the formation constants corresponding to various complexation equilibria.