Pi Bonding and Antibonding node destructive (antibonding)interaction π*antibonding MO energy constructive(bonding)interaction bonding MO The sideways overlap of two parallel p orbitals leads to a t bonding MO and a antibonding MO.A pi (bond is not as strong as most sigma bonds. 2013 Pearson Education,Inc. Chapter 2 11© 2013 Pearson Education, Inc. Pi Bonding and Antibonding The sideways overlap of two parallel p orbitals leads to a p bonding MO and a p* antibonding MO. A pi (p) bond is not as strong as most sigma bonds. Chapter 2 11