JEE Advanced Chemistry question

What type of isomerism is present in the pair of complexes [Co(NH_3)_5Br]SO_4 and [Co(NH_3)_5SO_4]Br

(A)Linkage isomerism
(B)Ligand isomerism
(C)Ionisation isomerismCorrect
(D)Coordination isomerism

Answer: (C)

Solution

These two complexes have the same molecular formula but differ in which ion ( or ) is coordinated to the metal versus which is the free counter ion outside the coordination sphere — this interchange of a

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Question ID VK-160118