Question

Which molecule/ion among the following cannot act as a ligand in complex compounds?

Options

• CH₄

• CO

• CN^-

• Br^-

Answer 1

CH₄ 

Explanation:

Ligands are the donor atoms, molecules, or anions that provide the metal atom or ion a pair of electrons in exchange for forming a coordinate bond with it. Methane is stable with a full octet configuration because there are no electrons available for donation to the core metal atom or ion.