What is the major difference between an antiaromatic and aromatic compound?

A) The structure must be cyclic for aromatic but not antiaromatic compounds.
B) Antiaromatic compounds have at least one sp³ hybridized atom in the ring.
C) Antiaromatic compounds can assume a chair-like structure while aromatic compounds are nearly flat.
D) Aromatic compounds cannot have a charged atom in the structure.
E) Only aromatic compounds follow Huckle's rule.

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Zybrea Knight · Accepted Answer

Final Answer : E, Explanation :  Antiaromatic compounds do not follow Hückel's rule, which states that a molecule must have a planar ring of continuously overlapping p-orbitals with 4n+2 π electrons (where n is a non-negative integer) to be aromatic. Antiaromatic compounds, on the other hand, have 4n π electrons and do not satisfy this rule, leading to instability and non-aromatic character.

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