Question

Using Valence Bond theory. account for the geometry and magnetic property of $[Ni.(CN{)}_4{]}^{2-}$.
(Given : Atomic number of Ni = 28)

Answer 1

It is square planar complex. Ni has +2 oxidation state with electronic configuration $3d^8$ and $ds{p}^2$ hybridization. As no unpaired electrons are present, the complex is diamagnetic.