The geometry and magnetic behaviour of the co | vedclass

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(B) The atomic number of $Ni$ is $28$. The electronic configuration of $Ni$ is $[Ar] 3d^8 4s^2$.In the complex $[Ni(CO)_4]$,the oxidation state of $Ni

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tetrahedral geometry and diamagnetic

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(B) The atomic number of $Ni$ is $28$. The electronic configuration of $Ni$ is $[Ar] 3d^8 4s^2$.In the complex $[Ni(CO)_4]$,the oxidation state of $Ni$ is $0$.$CO$ is a strong field ligand $(SFL)$,which causes the pairing of electrons in the $3d$ orbital.The $4s$ electrons are promoted to the $3d$ orbital,and the $4s$ and $4p$ orbitals undergo $sp^3$ hybridisation.Since all electrons are paired,the complex is diamagnetic.The $sp^3$ hybridisation results in a tetrahedral geometry.

The geometry and magnetic behaviour of the complex $[Ni(CO)_4]$ are

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