Thermodynamic Study of Complexation of Some Transition Metal Ions With 2-Substituted Thiazolidine-4-Carboxylic Acids in Aqueous-Ethanol Medium

B. Vinod Kumar, M. Satyanarayan Reddy and M. G. Ram Reddy

Department of Chemistry, Osmania University, Hyderabad-500 007 India

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ABSTRACT:

pH Metric titration technique has been applied to study the complex equilibria of 2-( p-chlo- rophenyI ) thiazolidine-4-carboxylic acid, 2-( p-tolyl ) thiazolidine-4-carboxylic acid, 2-( p-hyd- roxyrfunyl ) thiazolidinc-4-carboxylic acid and 2-( o-h>droxyphenyl ) thiazolidine-4-carboxylic adds with Mn (II), Co (II), Ni (II) and Zn (II) at different ionic strengths and temperatures. Cu(II) metal ion precipitated with all above ligands. Thermodynamic functions (ΔG, ΔH, ΔS), electro- static and eratic components have been evaluated and discussed.

KEYWORDS:

Thermodynamic; Complexation