Question

Which of the following is aromatic compounds?

• A.
• B.
• C.
• D. All of these

Answer 1

Answer: (D)

All of these

Answer 2

According to Huckel?s rule for aromaticity, planar monocyclic rings containing $(4n + 2)n$ electrons (where $n = 0, 1,2,3$ and so on) should be aromatic. Another requirement for aromaticity is planarity of the ring. In the given compounds, all contains $6n$ electrons, therefore for them, $n$ comes out be $1$,hence, pyrrole, thiophene and furan are all aromatic.