⇒ Tetrahedral ⇒dπ(Mn)−pπ(O) is present. ⇒ Paramagnetic, due to presence of one unpaired d -electron of Mn+6(3d′) of MnO42−. ⇒ Oxidising agent.
⇒ Tetrahedral ⇒dπ(Mn)−pπ(O) is present. ⇒ Diamagnetic, due to the absence of unpaired d -electron in\ Mn+7(3d0) of MnO4− ⇒ Stronger oxidising agent.