Thermodynamic studies on metal complexes of Pb2+, Zn2+, Sr2+ and Mg2+ with 2-amino pyrimidine in water and water-acetonitrile binary solvent systems at 298.15 K, 308.15 K and 318.15 K by conductometric method
Akshara P. Shah Â· Raviprakash S. Chandra Â· Dhruvi R. Mehta Â· M. M. Maisuria
Corresponding Author : Mukesh M. Maisuria,
Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India.
Email ID : firstname.lastname@example.org
Received : 2015-12-05 Accepted : 2016-01-02 Published : 2016-01-02
Abstract : Stability constants are measured for complexes of Pb2+, Zn2+, Sr2+ and Mg2+ with 2-amino pyrimidine (AMPYM) in pure water and water-acetonitrile binary solvent systems at 298.15, 308.15 and 318.15 K by conductometric method. The results shows that the stoichiometry of the complexes of AMPYM with all investigated metal ions in all binary solvent systems is 1:2 [ML2]. The log Kf values of M2+-AMPYM complexes in H2O-ACN binary solvent systems decreases with increasing % of ACN and increased with the increase in percentage of water and also with increase in temperature. The value of formation constants obtained by spectrophotometry for the AMPYM with Pb2+, Zn2+, Sr2+ and Mg2+ at 298.15 K in pure water are in good agreement with the values obtained by conductometry for AMPYM with all the investigated metal ions at 298.15 K. The âˆ†H0 and âˆ†S0 of the complexation reaction in the different H2O-ACN binary solvent systems were evaluated by the temperature dependence of the formation constants using a linear least square analysis according to vanâ€™t Hoff equation.
Keywords : 2-amino pyrimidine, conductometry, spectrophotometry, stability constants, thermodynamic parameters, complexation.
Citation : Mukesh M. Maisuria.et al. (2016). Thermodynamic studies on metal complexes of Pb2+, Zn2+, Sr2+ and Mg2+ with 2-amino pyrimidine in water and water-acetonitrile binary solvent systems at 298.15 K, 308.15 K and 318.15 K by conductometric method. j. of Physical and Chemical Sciences.V4I1. DOI : 10.5281/zenodo.999153
Copyright : © 2016 Mukesh M. Maisuria. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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