4 g/100 g of water at 293 K), but when heated it decomposes at 513 K 2KMnO4 ® K2MnO4 + MnO2 + O2
It has two physical properties of considerable interest: its intense colour
and its diamagnetism along with temperature-dependent weak
paramagnetism These can be explained by the use of molecular orbital
theory which is beyond the present scope The manganate and permanganate ions are tetrahedral; the p-
bonding takes place by overlap of p orbitals of oxygen with d orbitals
of manganese