Question

Find the number of unpaired electrons in the $t_{2g}$ set of $d$-orbitals of $\left[Mn\right(H_{2}O{)}_6{]}^{2+}$

• A. 3.00
• B. 3.0
• C. 3

Answer 1

Answer: (A), (B), (C)

In $\left[Mn\right(H_{2}O{)}_6{]}^{2+}$, $M{n}^{2+}$ has $d^5$ configuration. As water is weak field ligand, crystal field splitting energy is less than pairing energy. So pairing does not occur. There are $3$ unpaired electrons in $t_{2g}$ and $2$ unpaired electrons in $e_g$ orbital.