Evaluate the aromatic nature of the following cyclic ions. Which of these is exceptionally stable du — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

The Tropylium cation has 3 double bonds (6e-) and an empty p-orbital ($C^+$) completing the 7-membered planar ring. Total = 6 $\pi$ electrons. It satisfies the $4n+2$ ($n=1$) rule and is highly aromatic. $C_5H_5^+$ has 4 $\pi$ electrons (anti-aromatic).