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Vol. 28 No. 4 (2016): Vol 28 Issue 4

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Solvents Influence Upon Complex Formation of 7-Chloro-4-hydrazinoquinoline Schiff Base Ligand and Transition Metal(II) by Using Conductometric Method

https://doi.org/10.14233/ajchem.2016.19394
M. El-Batouti
Chemistry Department, Faculty of Science, Alexandria University, P.O. 426, Alexandria 21321, Egypt
G. Nawmosy
Chemistry Department, Faculty of Science and Arts, Qassim University, Al-Qassim, Saudi Arabia
E.H. El-Mossalamy
Chemistry Department, Faculty of Science, Benha University, Benha, Egypt

Corresponding Author(s) : M. El-Batouti

mervette_b@yahoo.com

Asian Journal of Chemistry, Vol. 28 No. 4 (2016): Vol 28 Issue 4

Abstract

7-Chloro-4-hydrazinoquinoline Schiff base was synthesized and characterized by elemental analyses, IR, 1H NMR, electronic spectra and mass spectrometry. The complex formation of Schiff base hydrazone ligand with Co(II), Ni(II), Cd(II), Zn(II), Cu(II) and Fe(III) in 75 % (v/v) ethanol-water, acetone-water and isopropanol-water mixtures at 30, 40 and 50 °C, assigned that the ligand behaves as a monoprotic. The stability constants of the formed complexes decreased with increasing temperature, reflecting that the complexation process is an exothermic process. Thermodynamics parameters are computed and analyzed in order to investigate the bond character between metal and ligand. The calculated values for DG, DH and DS suggested that the complexation process is spontaneous. The calculated dissociation constant of ligand (HL) depends on the relation between the basicity of the ligand and dielectric constant of different solvents.

Keywords

7-Chloro-4-hydrazinoquinoline Hydrazone Schiff base ligand Metal complexes Stability constant
El-Batouti, M., Nawmosy, G., & El-Mossalamy, E. (2015). Solvents Influence Upon Complex Formation of 7-Chloro-4-hydrazinoquinoline Schiff Base Ligand and Transition Metal(II) by Using Conductometric Method. Asian Journal of Chemistry, 28(4), 733–739. https://doi.org/10.14233/ajchem.2016.19394
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