Question

In the complex $\left[Ni\right(H_{2}O{)}_2(N{H}_3{)}_4{]}^{+2}$ the magnetic moment $\left(\mu \right)$ of $Ni$ is:

• A. Zero
• B. 2.83 BM
• C. 1.73 BM
• D. 3.87 BM

Answer 1

The correct option is A Zero

In the complex $\left[Ni\right(H2O{)}_2(N{H}_3{)}_4{]}^{2+}$ the Ni is in +2 oxidation state and there are 8 electrons in 3d subshell and since the $N{H}_3$ is a strong field ligand therefore the two unpaired electrons left gets paired up and hence the number of unpaired electrons become 0. hence the magnetic moment $\sqrt{n(n+2)}$ where n is the number of unpaired electron comes out to be 0. Hence the correct option is A.