Coordination Compounds - Result Question 40
####42. The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are
[2018]
(a) Square planar geometry and diamagnetic
(b) Tetrahedral geometry and diamagnetic
(c) Tetrahedral geometry and paramagnetic
(d) Square planar geometry and paramagnetic
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Solution:
- (b) $Ni(28):[Ar] 3 d^{8} 4 s^{2}$
$\because CO$ is a strong field ligand, so unpaired electrons get paired. Hence, configuration would be:
For, four ‘CO’ligands hybridisation would be $s p^{3}$ and thus the complex would be diamagnetic and of tetrahedral geometry.
