GOC and Organic Chemistry BasicshardNUMERICAL

In the highly stable, aromatic tropylium cation (), how many total -electrons are continuously delocGOC and Organic Chemistry Basics Chemistry Question

Question

In the highly stable, aromatic tropylium cation ($C_7H_7^+$), how many total $\pi$ -electrons are continuously delocalized around the planar, seven-membered ring system?

Answer: 6

💡 Solution & Explanation

The tropylium cation ($C_7H_7^+$) is a seven-membered ring with three conjugated double bonds and one carbocation center. Each double bond contributes two $\pi$ -electrons, totaling $3 \times 2 = 6$ delocalized $\pi$ -electrons, satisfying Huckel's ($4n+2$) rule for aromaticity.

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