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The two complexes of nickel, [Ni(CN)(4)]...

The two complexes of nickel, `[Ni(CN)_(4)]^(2-)` and `[Ni(CO)_(4)]`, have different structures but possess same magnetic behaviour. Explain.

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`[Ni(CN)_(4)]^(2-)` : In this complex, Ni is in + 2 oxidation state. It is a case of `dsp^(2)` hybridisation. This is a square planar complex. All the electrons are paired. Therefore, this complex is diamagnetic.
[Ni(CO)4J : In this complex, Ni is in O oxidation state. It is a case of `sp^(3)` hybridisation. This is a tetrahedral complex. Here also all the electrons are paired and the complex is diamagnetic.
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