Identify the type of hybridization present in $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$.
Identify the type of hybridization present in $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$.
$\mathrm{sp}^3 \mathrm{~d}^2$
$\mathrm{dsp}^2$
$\mathrm{sp}^3$
$\mathrm{d}^2 \mathrm{sp}^3$
Solution
In $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$, oxidation state of nickel is +2 . Valence shell electronic configuration of $\mathrm{Ni}^{2+}:[\mathrm{Ar}] 3 \mathrm{~d}^8 .3 \mathrm{~d}$ electrons are paired prior to the hybridisation and electronic configuration of $\mathrm{Ni}^{2+}$ becomes:
Four $\mathrm{CN}^{-}$ions donate their electron in four vacant $\mathrm{dsp}^2$ hybrid orbitals of $\mathrm{Ni}^{2+}$.
Configuration after the complex formation becomes:
