Question

Which of the following species is not expected to be a ligand?

Options

• \[\ce{NO}\]

• \[\ce{NH^{+}4}\]

• \[\ce{NH2 CH2 CH2 NH2}\]

• \[\ce{CO}\]

Answer 1

\[\ce{NH^{+}4}\]

Explanation:

Ligand must have atleast a lone pair of electrons to form M-L (Metal-ligand bond). In the above case \[\ce{NH^{+}4}\] does not possess any lone pair of electrons, hence it is not expected to be a ligand.