Question

What is meant by a unidentate ligand? Give an example.

Hint:

A unidentate ligand forms only one bond with the central metal atom, such as chloride (Cl$^-$), water (H$_2$O), or ammonia (NH$_3$).

Answer 1

A unidentate ligand is a ligand that can form only one coordinate bond with the central metal ion. This type of ligand donates only one lone pair of electrons to the metal center.
An example of a unidentate ligand is chloride ion (Cl$^-$), which donates one lone pair of electrons to form a bond with the metal ion.