MO for Buta-1,3-diene and Ethylene butadiene ethylene 1= bonding MOs are filled antibonding MOs are empty Buta-1,3-diene has lower energy of bonding isolated energy than ethylene p orbital 8▣} because of resonance stabilization. 821田 2013 Pearson Education,Inc. Chapter 15 11© 2013 Pearson Education, Inc. Chapter 15 11 MO for Buta-1,3-diene and Ethylene ▪ bonding MOs are filled ▪ antibonding MOs are empty. ▪ Buta-1,3-diene has lower energy than ethylene because of resonance stabilization