Abstract
The thermodynamic metal-ligand stability constants of Be2+, Mg2+, Ca2+, Sr2+ and Ba2+ with P-methoxy salicyldehydineazo methin (I), 2,4-dihydroxy salicyldin isomethin indazole (H) and 3,5-dichlorosalicyldine azomethin indazole (III) Schiff bases in 50% dioxane-water media at 293 K, 308 K and 383 K have been determined. The effect of the ligands, central metal ions, ratio of the charge and radius, atomic number of the atoms and the order of the stability constants is discussed The stability constants of the alkali earth metal follow the order Be2+ > Mg2+ > Ca2+ > Sr2+ > Ba2+ with all the substituted Indazol Schiff bases.