Complexation of 2-Mercaptoimidazol with Some Barium Salts Conductometrically in Various Solvent at Different Temperatures

摘要: The complexation reaction between 2-meracptoimidazol (MI) ligand with BaCl2 and Ba (NO3) 2 salts were studied conductometrically in methanol, 50% methanol-water and water at four different temperatures (293.15 K, 298.15 K, 303.15 K, 308.15 K). On drawing the relation between molar conductance and the ratio of metal to ligand concentrations, different lines are obtained indicating formation of 1: 1 and 2: 1 [M]/[L] stoichiometric complexes. Limiting molar conductance, Activation energy, Formation constants and thermodynamic parameters of different complexes were determined. Negative values of Gibbs free energy of complexation indicate that the reaction is spontaneous.