Question

$NiC{l}_2{P\left(C_2{H}_5{)}_2\right(C_6{H}_5)}_2$ exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of $N{i}^{2+}$ in the paramagnetic and diamagnetic states are respectively

• A. Square planar and square planer
• B. Square planer and tetrahedral
• C. Tetrahedral and tetrahedral
• D. Tetrahedral and square planer

Answer 1

The correct option is D Tetrahedral and square planer

The hybridisation of $N{i}^{2+}$ in paramagnetic complex is $s{p}^3$ and hence the complex is tetrahedral. The diamagnetic complex is square planer as the hybrisation of $N{i}^{2+}$ is $ds{p}^2$.