\(\left[\mathrm{Zn}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}: \mathrm{sp}^{3} \mathrm{d}^{2}\) (outer), octahedral, diamagnetic
\(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}: \mathrm{d}^{2} \mathrm{sp}^{3}\) (inner), octahedral, paramagnetic
\(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}: \mathrm{d}^{2} \mathrm{sp}^{3}\) (inner). octahedral, diamagnetic
$(a)$ રીડ્યુસીંગ
$(b)$ ઓક્સીડાઇજિગ
$(c)$ સંકીર્ણતા
$\operatorname{cis}-\left[\mathrm{Cr}(\mathrm{ox})_2 \mathrm{Cl}_2\right]^{3-},\left[\mathrm{Co}(\mathrm{en})_3\right]^{3+}$
$\operatorname{cis}-\left[\mathrm{Pt}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{2+}, \text { cis }-\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$
$\text {trans }-\left[\mathrm{Pt}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{2+}, \text { trans }-\left[\mathrm{Cr}(\mathrm{ox})_2 \mathrm{Cl}_2\right]^{3-}$