What are the geometry and magnetic behaviors of the complex Ni CO 4 ?

1. Square planar geometry and paramagnetic.
2. Tetrahedral geometry and diamagnetic.
3. Square planar geometry and diamagnetic.
4. Tetrahedral geometry and paramagnetic.

Solution

Electronic configuration of:
$\mathrm{Ni}\to 3{\mathrm{d}}^8\mathrm{ }4{\mathrm{s}}^2$

$\mathrm{CO}$ is strong field ligand so unpaired electrons will get paired.

${\mathrm{sp}}^3$ hybridisation
Tetrahedral, diamagnetic.

Asked in: NEET 2018

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