MO for 1,3-Butadiene ·Lowest energy, bonding bonding bonding ·All bonding interactions. ● Electrons are delocalized over four nuclei. Copyright2005 Peerson Prentce Hall,ine > Chaper 15 8Chaper 15 8 1 MO for 1,3-Butadiene • Lowest energy. • All bonding interactions. • Electrons are delocalized over four nuclei. =>