JEE Main Chemistry question

Which of the following copper(II) compounds shows a magnetic moment distinctly lower than the normal spin-only value, because of metal–metal interaction?

(A)Correct
(B)
(C)
(D)

Answer: (A)

Solution

All four compounds contain mononuclear-type (, one unpaired electron, normal – BM) — except copper(II) acetate monohydrate, , which has a unique paddle-wheel dimeric structure with the two centres close enough for a weak direct Cu–Cu interaction

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Question ID VK-155744