Question

What type of isomerism is shown by the complex \([\text{Co(NH}_3)_6][\text{Cr(CN)}_6]\)?

The given coordination compound \([\text{Co(NH}_3)_6][\text{Cr(CN)}_6]\) exhibits ionization isomerism.

**Explanation:** Ionization isomerism arises when two complexes have the same molecular formula but yield different ions in solution. In this case, the cationic complex \([\text{Co(NH}_3)_6]^{3+}\) and the anionic complex \([\text{Cr(CN)}_6]^{3-}\) could interchange their ligands under different conditions, leading to a different complex with distinct properties.

Hint:

Ionization isomerism occurs when two compounds have the same molecular formula but differ in the arrangement of ions.

Answer 1

The complex \([\text{Co(NH}_3)_6][\text{Cr(CN)}_6]\) exhibits ionization isomerism.

In ionization isomerism, two different compounds have the same molecular formula but differ in the way the ions are arranged. One of the isomers will have the ion \([\text{Cr(CN)}_6]^{3-}\) as the anion, while the other will have the ion \([\text{Co(NH}_3)_6]^{3+}\) as the anion.

The difference in the arrangement of ions leads to the formation of different ions in solution, which are responsible for the isomerism.