`CN^(-)` is a strong field ligand. This is due to the fact that

Options

A. It can accept electron from metal species
B. It forms high spin complexes with metal species
C. It carries negative charge
D. It is a pseudohalide

Answer

D

Explanation

Cyanide ion is strong field ligand because it is a pseudohalide ion, pseudohalide ions are stronger coordinating ligand & they have the ability to form σ bond (from the pseudohalide to the metal) and π bond (from the metal to pseudohalide).