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Why is [NiCl4]^2- paramagnetic while [Ni(CN)4]^2- is diamagnetic?

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Why is [NiCl4]2- paramagnetic while [Ni(CN)4]2- is diamagnetic? (Atomic number of Ni = 28)

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In [NiCl4]2-, due to the presence of Cl- a weak field ligand no pairing occurs whereas in [Ni(CN)4]2-, CN- is a strong field ligand and pairing takes place/diagrammatic represenlation. 

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(a) Why is [NiCl4]^2- paramagnetic while Ni(CN)4]^2- is diamagnetic?
asked Jun 9, 2021 in Chemistry by Labdhi (29.6k points)

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