Question

Among the following, the species that is both tetrahedral and diamagnetic is:

• A. $[NiC{l}_4{]}^{2+}$
• B. $Ni(CO{)}_4$
• C. $\left[Ni\right(CN{)}_4{]}^{2+}$
• D. $\left[Ni\right(H_{2}O{)}_6{]}^{2+}$

Answer 1

Answer: (B)

$Ni(CO{)}_4$

$\left[Ni\right(CO{)}_4]$ is both tetrahedral as well as diamagnetic as $N{i}^{2+}$ is bonded with a strong field ligand which will pair up the electrons present in valence shell of d orbital.