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Huckel's rule is one of the criteria which should be fulfilled by aromatic which should be fulfilled by Aromatic compounds to possess Aromaticity .

According to Huckl's rule all planer Aromatic Compound must have 4n+2 pi- electrons where n is an integer (i.e. n= 0,1,2,3,4) . This rule estimates whether a planar ring Compound will possess Aromatic Properties or not.

Huckel's Rule states that a Cyclic Planer molecule is considered to be Aromatic if it has 4n + 2pi electrons .

Huckle' srule is a set of Algorithms that determines whether the molecule is Aromatic, Antiaromatic or Non- Aromatic by combining the number of pi electrons and the physical structure of the Ring system.

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