Studies on Interaction between Sm (III) and Nd (III) Metal Ions and Novel Chalcones at 0.1M Ionic Strength pH Metrically

The interaction of Sm (III) and ND (III) metal  ions with  3-Bromo-2-hydroxy-5-Methyl  chalcone (L1) and 3-Bromo-(2-hydroxy-5-methyl benzoyl) -4-phenyl-1, 3-butadine chalcones (L2) have been studied in 0.1M ionic strength at 70% Dioxane-water mixture by Bjerrum method as adopted by Calvin and Wilson. It is observed that Sm(III) and Nd(III) metal ions from 1:1 and 1:2 complexes with ligands (L1 & L2). The data obtained were used to estimate and compare the values of proton-ligand stability constant (pk) and metal-legand stability constants (logK). The effect of substituents was studied from estimated data (pK & logK).