What Is The Hybridisation For [Ni(CN)4]2-?

Redistribution of the energy of orbitals of individual atoms to give orbitals of equivalent energy happens when two atomic orbitals combine to form a hybrid orbital in a molecule. This process is called hybridization.  Hybridized orbitals are utilised in explaining the shape of molecular orbitals for molecules, and are an integral part of valence bond theory.

The hybridisation of [Ni(CN)4]2-  is dsp2

Hybridisation of [Ni(CN)4]2-

The atomic number of nickel is 28. The electronic configuration of nickel is [Ar] 3d8 4s².

In [Ni(CN)4]2-, there is Ni2+ ion for which the electronic configuration in the valence shell is 3d8 4s0.

* In presence of strong field CN- ions, all the electrons are paired up.

The empty 3d, 3s and two 4p orbitals undergo dsp2 hybridization to make bonds with CN- ligands in square planar geometry.

Thus [Ni(CN)4]2- is diamagnetic. It is said to be a low spin inner orbital complex.

The dsp2 hybridisation in [Ni(CN)4]2- ion is shown below.

What Is The Hybridisation For Ni Cn 4 2?

Hence,

Hybridization of [Ni(CN)4]2-: dsp2

The shape of [Ni(CN)4]2-: Square planar

Magnetic nature: Diamagnetic (low spin)

Check out the video given below to know more about valence bond theory

Further Reading

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