o*Antibonding MO Destructive interaction:The two 1s orbitals are out of phase. antibonding molecular orbital represented by: ot antibonding MO Formation of a o*antibonding MO:When two 1s orbitals overlap out of phase,they interact destructively to form an antibonding MO. 2013 Pearson Education,Inc. Chapter 2 6 © 2013 Pearson Education, Inc. s* Antibonding MO Formation of a s* antibonding MO: When two 1s orbitals overlap out of phase, they interact destructively to form an antibonding MO. Chapter 2 6