what is called gerade and ungerade MO? Hence, explain the symmetry of sigma and pi MO?
Hello aspirant,
The symbols g and u come from the German words " gerade" and "ungerade " meaning "even" and "odd" respectively. ... If inversion through the center of symmetry in a molecule results in a phase change for the molecular orbital, then the MO is said to have ungerade (u) symmetry , from the German word for odd.
Hope it helps!