Coordination CompoundHard

Question

Which of the following complexes shows ionization isomerism ?

Options

A.[Cr(NH3)6]Cl3
B.[Cr(en)2]Cl2
C.[Cr(en)3]Cl3
D.[Co(NH3)5Br]SO4

Solution

(A) No anionic ligand is present in coordination sphere for the exchange with Cl- ions present in ionisation sphere.
(B) No anionic ligand is present in coordination sphere for the exchange with Cl- ions present in ionisation sphere.
(C) No anionic ligand is present in coordination sphere for the exchange with Cl- ions present in ionisation sphere.
(D) Br- and SO4- can exchange their positions between coordination sphere and ionisation sphere. Hence it shows ionization isomerism.

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