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%20%20%20%20Thermodynamic%20studies%20on%20metal%20complexes%20of%20Pb2 ,%20Zn2 ,%20Sr2 %20and%20Mg2 %20with%202-amino%20pyrimidine%20in%20water%20and%20water-acetonitrile%20binary%20solvent%20systems%20at%20298.15%20K,%20308.15%20K%20and%20318.15%20K%20by%20conductometric%20method
Research article
  

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 · Raviprakash S. Chandra · Dhruvi R. Mehta · M. M. Maisuria

Department of Chemistry, School of Sciences, Gujarat University, Ahmedabad 380009, India


Corresponding author :

Mukesh M. Maisuria,
Tel.: +91-079-26920261,
Email:

Received: December 5, 2015,   Accepted: January 2, 2016,   Published:


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 ∆H0 and ∆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 van’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: 10.15297/JPCS.V4I1.01


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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      Journal of Physical and Chemical Sciences