[vxchen]

In order to know if a delocalized pi bond occurs, we have to figure out if the unhybridized p orbitals are planar or perpendicular because if they're perpendicular, the pi bond won't occur. But how do you figure out when the unhybridized p-orbitals are perpendicular or planar? In addition, in benzene, how come all the unhybridized p-orbitals can't be linked in a chain-like fashion? Why and how do you know it's a ring shaper?