Constructing H H H Molecular orbitals Pi molecular orbitals are the sideways overlap of p orbitals p orbitals have 2 lobes. Plus(+)and minus C indicate the opposite phases of the wave unction, not electrical charge When lobes overlap constructively, ( and +,or-and -)a bonding Mo is formed When and -lobes overlap, waves cancel out and a node forms; antibonding Mo.=> Chaper 15Chaper 15 6 Constructing Molecular Orbitals • Pi molecular orbitals are the sideways overlap of p orbitals. • p orbitals have 2 lobes. Plus (+) and minus (-) indicate the opposite phases of the wave function, not electrical charge. • When lobes overlap constructively, (+ and +, or - and -) a bonding MO is formed. • When + and - lobes overlap, waves cancel out and a node forms; antibonding MO. =>