Acidic and bidented ligand's example please give as fast as you can

Bidentate ligands have two donor atoms which allow them to bind to a central metal atom or ion at two points. Common examples of bidentate ligands are ethylenediamine (en), and the oxalate ion (ox).

Pi-acidic ligands are ligands that have a relatively low-lying LUMO that has the appropriate symmetry to interact with a d-orbtal on the metal centre and the resultant molecular orbital formed will have pi-symmetry

Bidentate ligand is a ligand that has two "teeth" or atoms that coordinate directly to the central atom in a complex. An example of a bidentate ligand is ethylenediamine. A single molecule of ethylenediamine can form two bonds to a metal ion.

dear student some of examples are scn , gly etc..