State Huckel's rule of aromaticity and explain it interms of cyclopentediene, cycloxtateraene and cyclopropenylcation.

State Huckel's rule of aromaticity and explain it interms of cyclopent

1.	State Huckel's rule of aromaticity and explain it interms of cyclopentediene, cycloxtateraene and cyclopropenylcation.
Answer» Solution :HUCKEL proposed that AROMATICITY is a function of electronic structure. A compound MAY be aromatic, if it obyes the following rules `(i)` The molecule must be co-planar `(ii)` COMPLETE delocalization of `pi` electron in the RING `(iii)` Pressence of `(4n+2)pi` electrons in the ring where `n` is an integer `(n=0,1,2,.......)` is is known as Huckle's rule.