Synthesis, Spectroscopic Characterization, and Biological Evaluation Studies of 5-Bromo-3-(((hydroxy-2-methylquinolin-7-yl)methylene)hydrazono)indolin-2-one and Its Metal (II) Complexes

Table 1

The experimental procedure involves the acid titration, ligand titration, and metal titration. = 25 ± 1°C  50% Dioxane-water  µ = 0.1 M/0.2 M NaClO₄.

Solution; (initial concentration)	Acid; titration	Ligand titration	Metal titration
HClO4 (0.01 M)	5.0 mL	5.0 mL	5.0 mL
NaClO4 (1 M/2 M)	5.0 mL	5.0 mL	5.0 mL
Dioxane	25.0 mL	25.0 mL	25.0 mL
Water	15.0 mL	10.0 mL	5.0 mL
Ligand (0.01 M)	—	5.0 mL	5.0 mL
Metal (0.01 M)	—	—	5.0 mL