International Journal of Chemical Studies
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P-ISSN: 2349-8528, E-ISSN: 2321-4902   |   Impact Factor: GIF: 0.565

International Journal of Chemical Studies

Vol. 8, Issue 2 (2020)
Study of formation constant of schiff base containing Thiazole ring in mixed solvent media and their thermodynamic parameters


Author(s): BN Muthal

Abstract: The Schiff bases derived from substituted aminothiazole i.e.2-4-Diamino-5-phenylthiazole and R-Substituted salicyladehyde (R-5-CH3, and 5-Cl) or 2hydroxy-1-naphthaldehyde i.e. (5MS)2 DPT, (5CS)2 DPT and (HN) 2 DPT and Rare earth metal ion LaIII, CelIl, PrlIl, NdlIl, SmlIl", GdlIl, TblIl, HolIl, DylIl and YblIl Nitrate Salts. The stability constants of lanthanide metal ion complexes in mixed solvent media in ethanol-water 50:50 (v/v) at different ionic strength µ= 0.05, 0.1, 0.15 and 0.2 M (NaClO4) and at different temperature (35 °C and 45 °C) using Bjerrum pH metric technic as adopted by Irrving-Rossoti. The formation constants are determined by Half Integral method. The stability constants of Rare earth metal (III) ion complexes have been proportional to their ionic strength. The thermodynamic parameter (∆H, ∆G and ∆S) were determined. The negative free energy change (∆G) in each cases indicates that the complexation is spontaneous. The enthalpy changes are exothermic. The positive values of ∆S Indicates the reactions are entropically favoured.

DOI: 10.22271/chemi.2020.v8.i2a.8748

Pages: 31-34  |  1011 Views  22 Downloads

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How to cite this article:
BN Muthal. Study of formation constant of schiff base containing Thiazole ring in mixed solvent media and their thermodynamic parameters. Int J Chem Stud 2020;8(2):31-34. DOI: 10.22271/chemi.2020.v8.i2a.8748
International Journal of Chemical Studies