Chemistry - Coordination Chemistry Question with Solution | TestHub

Charge transfer from${\text{O}}^{2-}$to empty$\text{d}$-orbitals of metal ion${\text{(Mn}}^{7+}).$
The colour in${\text{KMnO}}_{\text{4}}$arises from an electronic transition. In the permanganate ion${\text{(MnO}}_{\text{4}}^{-}\text{),}$manganese is in the$+7$oxidation state, so it has no$\text{d}$electrons. Photons promote an electron from the highest energy molecular orbital to an empty$\text{d}$-orbital on the manganese. When a photon of light is absorbed, this charge transfer takes place from$\text{L}$to$\text{M}\text{.}$