Delocalizedπbonds andπelectrons 离域pi键 benzene Delocalized πBonding 2p 2p 2s 111 Ground State Promoted State 3 sphybrid Orbitals (a)o bonds b)2p atomic orbitalsbenzene H H H H H H Delocalized π Bonding 离域pi键 Delocalized π bonds and π electrons