For 10 points, name this property of conjugated cycloalkenes which are extremely stable due to electron delocalization, exemplified by benzene.
A version of this property present in the trinitromethane anion and the guanidinium anion is called its "Y" type. Molecules with this property show peaks in the 900 to 700 inverse centimeter range in their IR spectrum corresponding to oop bending. Molecules with this property have a diatropic current, as well as often having quadrupole moments that allow stacking interactions. The restoration of this property after kicking out HCl is the driving force of the (*) Friedel-Crafts reaction. Larger systems exhibiting this property include coronene and pyrene. Molecules with this property are planar, cyclic, and and have an extended pi system containing 4n+2 electrons according to Huckel's Rule. For 10 points, name this property of conjugated cycloalkenes which are extremely stable due to electron delocalization, exemplified by benzene.
A version of this property present in the trinitromethane anion and the guanidinium anion is called its "Y" type.
aromaticity [or aromatic]