When a didentate or a polydentate ligand contains donor atoms positioned in such a way that when they coordinate with the central metal ion, a 5 or 6 membered ring is formed, the effect is known as the chelate effect.
When a didentate or a polydentate ligand contains donor atoms positioned in such a way that when they coordinate with the central metal ion, a 5 or 6 membered ring is formed, the effect is known as the chelate effect.