Chemistry - Coordination Chemistry Question with Solution | TestHub

Question Explanation:

Determine if the complex shows ionization isomerism via the exchange of water and chloride ions.

Concept: Ionization requires exchanging different ions.

Solution:

Ionization isomerism occurs only when different ions are interchanged between the coordination sphere and the outer sphere.

In the complex $[\mathrm{Co}(\mathrm{N}{\mathrm{H}}_3{)}_4({\mathrm{H}}_2\mathrm{O}{)}_2]{\mathrm{Cl}}_3$, the counter ions are $\mathrm{C}{\mathrm{l}}^{-}$, while the ligands NH₃ and H₂O are neutral molecules.

When a neutral molecule like H₂O is interchanged with an ion like Cl⁻, the resulting isomers are called hydrate (or solvate) isomers, not ionization isomers. Since there is no other ion inside the bracket to swap with the chloride ion, ionization isomerism is not possible.