Question

explain huckle rule with example

Answer 1

Hückel's Rule. ... Because a closed bond shell of π electrons defines an aromatic system, you can use Hückel's Rule to predict the aromaticity of a compound. For example, the benzene molecule, which has 3 π bonds or 6 π electrons, is aromatic.

Answer 2

I think its Huckel's rule not huckle rule.
A cyclic ring molecule follows Hückel's rule when the number of its π-electrons equals 4n + 2 where n is a non-negative integer, although clearcut examples are really only established for values of n = 0 up to about n = 6 and this is the answer for huckel rule.