Chemistry - Coordination Chemistry Question with Solution | TestHub

The two electrons present in t_2gorbitals can show d-d transitions between t_2gand e_gorbitals by absorbing visible light as CFSE is not very high due to weak NH₃ligand field in an octahedral geometry

$\begin{array}{cccc}{}_{21}{\text{Sc}}^{3+}& \to & 3{\text{d}}^{\circ }& \\ {}_{22}{\text{Ti}}^{4+}& \to & 3{\text{d}}^{\circ }& \\ {}_{30}{\text{Zn}}^{2+}& \to & 3{\text{d}}^{10}& \end{array}\}$

Configurations and d-d transitions leading to colouration etc, are not feasible.