Aromatic HydrocarbonshardNUMERICAL

Calculate the value of the integer '' in Huckel's rule for the aromatic polycyclic hydrocarbon AnthrAromatic Hydrocarbons Chemistry Question

Question

Calculate the value of the integer '$n$' in Huckel's $(4n+2)\pi$ rule for the aromatic polycyclic hydrocarbon Anthracene.

Answer: 3

💡 Solution & Explanation

Anthracene consists of three linearly fused benzene rings. The total number of $\pi$ electrons involved in the conjugated system is $14$. Equating this to Huckel's rule: $4n + 2 = 14 \Rightarrow 4n = 12 \Rightarrow n = 3$.

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