Coordination CompoundHard

Question

Of the following complex ions, which is diamagnetic in nature ?

Options

A.[ Ni ( CN)4]2- 
B.[CuCl4]2- 
C.[CoF6]3- 
D.[NiCl4]2- 

Solution

Electronic configuration of Ni2+ in [NiCl4]2- is
Ni2+ = 3d8 4s0

Ni2+ has dsp2 hybridisation, as CN2+ is a strong field ligend.

∴ [ Ni ( CN)4]2- is diamagnetic (because of the absence of unpaired electrons).

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