The number of unpaired electrons in the complexes $\left[\mathrm{Cu}(\mathrm{en})_2\left(\mathrm{H}_

Question

The number of unpaired electrons in the complexes $\left[\mathrm{Cu}(\mathrm{en})_2\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] \mathrm{Cl}_2$ and $\mathrm{K}_3\left[\mathrm{CrI}_6\right]$ are

Professor PC Thomas Classes · Answer

Cu(II) is $d^9$ (1 unpaired), Cr(III) is $d^3$ (3 unpaired).