Question

using suitable example define gerade and ungerade orbitals classify orbitals as gerade or ungerade 1s,2px,3dxy

Answer 1

HEY!!!!!!

SEEE

rotate about the first orbital about an axis perpendicular to the inter-nuclear axis, the smaller lobe goes to the right only; the sign always remains same; just the position of the lobe has been changed. But in the first picture, only the bonding mo is gerade while the anti-bonding mo is ungerade; I'm not getting how by rotating along the axis perpendicular to the inter-nuclear axis, the sign of the antibonding mo changes making it ungerade.