Stability Constants of Some Biologically Important Pyrazoles and Their Ni2 Complexes in Different Dielectric Constant of MediumReport as inadecuate




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E-Journal of Chemistry - Volume 9 2012, Issue 2, Pages 637-641



School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded-431 606 MS, India

G. S. G. College, Umarkhed-445 206, Dist.-Yavatmal MS, India

Received 10 July 2011; Accepted 20 September 2011

Copyright © 2012 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.

Abstract

The proton-ligand stability constants of some biologically important new pyrazoles and formation constants of their complexes with NiII were determined at 0.1 mol dm

ionic strength and at 303.15 K in different dielectric constant of dioxane-water mixture by potentiometric method. The Calvin-Bjerrum's pH-titration technique as used by Irving and Rossotti was used for determination of stability constants. The results enabled to study the electrostatic forces of attraction between metal ion and ligand with changes in dielectric constant of the medium.





Author: S. D. Deosarkar, A. L. Puyad, and S. A. Chavan

Source: https://www.hindawi.com/



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