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Polydentate ligands Ligands which only bond to the central metal atom/ion through one side are called monodentate ligands. Some ligand molecules are able to bind to the metal ion through multiple sites, due to having free lone pairs on more than one atom, these are called polydentate. EDTA? is an example of a polydentate ligand - it is able to bond through 6 sites, completely surrounding the ion. Polydentate ligands tend to be very stable, as it is necessary to break all of their bonds to the central atom for them to be displaced. |
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