Aromaticity

Aromaticity

Huckel proposed that aromaticity is a function of electronic structure. A compound may be aromatic, if it obeys the following rules

i. The molecule must be co-planar

ii. Complete delocalization of π electron in the ring

iii. Presence of (4n+2) π electrons in the ring where n is an integer (n=0,1,2….)

This is known as Huckel’s rule.

Some of the examples for Huckel rule