Question

Using suitable example define gerade and ungerade orbitals

Answer 1

Gerade and Ungerade:- German words for Evenand Odd respectively

If inversion through the center of symmetry (Midpoint of bonding axis) in a molecule results in no sign change for the molecular orbital, then the MO is said to have Gerade (g)symmetry (German word for even). If inversion through the center of symmetry in a molecule results in change of sign for the molecular orbital, then the MO is said to have Ungerade (u) symmetry (German word for odd).