Aromatic Requirements Structure must be cyclic with conjugated pi bonds. Each atom in the ring must have an unhybridized p orbital(sp2 or sp). The p orbitals must overlap continuously around the ring.Structure must be planar (or close to planar for effective overlap to occur) Delocalization of the pi electrons over the ring must lower the electronic energy. Chapter 16 20 Chapter 16 20 Aromatic Requirements • Structure must be cyclic with conjugated pi bonds. • Each atom in the ring must have an unhybridized p orbital (sp2 or sp). • The p orbitals must overlap continuously around the ring. Structure must be planar (or close to planar for effective overlap to occur) • Delocalization of the pi electrons over the ring must lower the electronic energy