3*MO for 1,3-Butadiene Antibonding MO antibonding antibonding bonding Empty at ground state. Two nodes. Vacant in the ground state. node node Chapter 15 10 Chapter 15 10 3 * MO for 1,3-Butadiene ▪ Antibonding MO. ▪ Empty at ground state. ▪ Two nodes. ▪ Vacant in the ground state