Molecular Orbitals(MOs) -Each p orbital has two lobes with the wave function indicated by plus (+)and minus(-) sign (not electrical charges). -When lobes overlap constructively (and + or-and-),a pi bonding (MO is formed. -When lobes overlap destructively (and-), a pi antibonding(π*）MO is formed. 2013 Pearson Education,Inc. Chapter 15 5© 2013 Pearson Education, Inc. Chapter 15 5 Molecular Orbitals (MOs) ▪ Each p orbital has two lobes with the wave function indicated by plus (+) and minus (–) sign (not electrical charges). ▪ When lobes overlap constructively (+ and +, or – and –), a pi bonding (p) MO is formed. ▪ When lobes overlap destructively (+ and –), a pi antibonding (p*) MO is formed