Answer to Question #109605 in Inorganic Chemistry for Hitarth

Question

How we can identify Gerade or ungerade orbitals if it is not possible to rotate the molecule ?

Answer 1

An alternative method for determining the symmetry of the molecular orbital is to rotate the orbital about the line joining the two nuclei and then rotate the orbital about the line perpendicular to this. If the sign of the lobes remains the same, the orbital is gerade, and if the sign changes, the orbital is ungerade