Question

What is the difference between an ambidentate ligand and a bidentate ligand?

Hint:

Ambidentate ligands can bind through multiple donor atoms, while bidentate ligands always bind through two atoms.

Answer 1

- Ambidentate ligand: A ligand that can coordinate to the central metal through two different atoms, but not simultaneously, is called an ambidentate ligand. For example, the cyanide ion (\( \text{CN}^- \)) can bind through either the carbon or nitrogen atom. - Bidentate ligand: A ligand that can form two bonds with the central metal ion through two different donor atoms is called a bidentate ligand. For example, ethylenediamine (\( \text{en} \)) can form two bonds with the central metal. Explanation:
- Ambidentate ligands bind through two possible donor atoms, while bidentate ligands always bind through two atoms, resulting in a more stable complex due to chelation.