Q.
$CN^{-}$ is strong field ligand. This is due to the fact that
A) It carries negative charge
B) It is a pseudohalide
C) It can accept electrons from metal species
D) It forms high spin complexes with metal species.
Explanation
(b)
$CN^{-}$ is strong field ligand because it is an example of pseudohalide. Pseudohalide ions are stronger coordinating ligands and they have the ability to form $\sigma$ bond and $\pi$-bond.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.