Question

$C{N}^{-}$ is a strong field ligand. This is due to the fact that:

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

Answer 1

Answer: (B)

it can accept electrons from metal species

$C{N}^{-}$ is a strong field ligand. This is because cyanide ion is a strong coordinating ligand and it possess ability to form $\sigma$ bond with metal and $\pi$ bond to pseudohalide.

Also, $C{N}^{-}$ acts as a strong field ligand because it can accept electrons from metal species.