Answer:
The necessary
conditions for a system to be aromatic are:
(i) Aromatic compounds are cyclic.
(ii) These compounds have conjugated \[\pi \]-bonds.
(iii) Aromatic rings are planar.
(iv) According to Huckels rule, the aromatic compounds
must have \[(4n+2)\]\[\pi \] electrons in the ring system.
Where n =1, 2, 3....
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