First slide

Terms used in complex chemistry

Question

CN^– is a strong field ligand. This is due to the fact that

Easy

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

Solution

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 n bond (from the metal to pseudohalide).

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