Question

A compound with molecular formula C₄H₄O has all the four carbon atom and the oxygen atom in the ring. It also has two carbon-carbon double bonds. The compound is ____________.

Options

• hetero-alicyclic

• hetero-aromatic

• alicyclic

• homocyclic and aromatic

Answer 1

A compound with molecular formula C₄H₄O has all the four carbon atom and the oxygen atom in the ring. It also has two carbon-carbon double bonds. The compound is hetero-aromatic.

Explanation:

Furan (C₄H₄O) is a hetero-aromatic molecule because one lone pair of e⁻ on the oxygen atom is delocalized into the ring, resulting in a (4n + 2)π electron system, as per Huckel's rule.