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[NiCl(4)]^(2-) is paramagnetic while [Ni...

`[NiCl_(4)]^(2-)` is paramagnetic while `[Ni(CO)_(4)]` is diamagnetic though both are tetrahedral. Why?

Text Solution

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In`[NiCl_(4)]^(-2)`, Ni has `3d^(8)4s(0)` configuration, `Cl^(-)` can.t pair up while in `[Ni(CO)_(4)]` , Ni has `3d^(8)4s(2)` configuration, CO pair uo electrons.
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