Question

$\left[Ni\right(CN{)}_4{]}^{2-}$ and $[NiC{l}_4{]}^{2-}$ have similarity but not in:

• A. Magnetic moment.
• B. C.N. and O.N.
• C. Structure
• D. Both (a) and (c)

Answer 1

The correct option is D Both (a) and (c)

$N{i}^{2+}-\left[Ar\right]3d^8$
When the ligand is strong field ligand it will pair all the unpaired electrons and hence diamagnetic.
When the ligand is weak field ligand it won't pair the unpaired electrons and hence paramagnetic.and $\left[Ni\right(CN{)}_4{]}^{2-}$ is diamagnetic and $NiC{l}_4^{2-}$ is paramagnetic.
$NiC{l}_4^{2-}$ is $s{p}^3$ hybridised and $\left[Ni\right(CN{)}_4{]}^{2-}$ is $ds{p}^2$ hybridised.