Classify the following compound as aromatic, anti-aromatic or non-aromatic. Count only the π electrons in the ring and do not count the π electrons of the exocyclic C= $C H_{2}$ bond.

Question

Classify the following compound as aromatic, anti-aromatic or non-aromatic. Count only the π electrons in the ring and do not count the π electrons of the exocyclic C= C H 2 ​ bond.

TestHub · Accepted Answer

The ring has two C=C bonds (4π) and the O lone pair (2π) in a p orbital : 6π electrons. The exocyclic C=C bond is outside the ring and is not counted. The ring is aromatic.

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