Question

The complex $\left[Co\right(N{H}_3{)}_5\left(N{O}_2\right){]}^{2+}$ and $\left[Co\right(N{H}_3{)}_5\left(ONO\right){]}^{2+}$ are called:

• A. Ionisation isomer
• B. Linkage isomers
• C. Coordination isomer
• D. Geometrical isomer.

Answer 1

Answer: (B)

Linkage isomers

Option (B) is correct.

The complex $\left[Co\right(N{H}_3{)}_5\left(N{O}_2\right){]}^{2+}$ and $\left[Co\right(N{H}_3{)}_5\left(ONO\right){]}^{2+}$ are called linkage isomers due to presence of $N{O}_2$ ligand. It is an ambidentate ligands are capable of coordinating in more than one way i.e $N{O}_2^{-}/ON{O}^{-}$.