【How-to】Why is ethylenediamine a bidentate ligand

A ligand is an ion or molecule, which donates a pair of electrons to the central metal atom or ion to form a coordination complex. The word ligand is from Latin, which means “tie or bind”. … Examples for anionic ligands are F^–, Cl^–, Br^–, I^–, S₂^–, CN^–, NCS^–, OH^–, NH₂^– and neutral ligands are NH₃, H₂O, NO, CO.