What are the necessary conditions for any system to be aromatic?


The necessary conditions for any system to be aromatic are as follows : -

(i) It should have a planar structure.


(ii) The π–electrons of the compound should be completely delocalized in the ring.


(iii) The total number of π–electrons present in the ring should be equal to (4n + 2),


where n = 0, 1, 2 … etc which is known as Huckel’s rule.


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