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JEE Main · 2024 · 27 Jan 2024 · Shift 1 · General Organic Chemistry

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Among the given organic compounds, the total number of aromatic compounds is
(A) (see structure)
(B) (see structure)
(C) (see structure)
(D) (see structure)

Answer: 3

Solution

Applying Hückel's rule (cyclic, planar, fully conjugated, electrons) to the four structures: the naphthalene-type and indene-type fused-ring systems and the oxygen-bridged tricyclic (dibenzofuran-type) system each satisfy aromaticity, while the compound built around a non-aromatic cyclohexene ring does not. Three of the four compounds are aromatic.

JEE Main · 2024 · 27 Jan 2024 · Shift 1 · Integer answer

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