Most compounds containing the benzyl group produce a peak at m/z 91 corresponding to the tropylium ion.
Explain why tropylium cation is very stable.

• A. The stability of the tropylium cation is due to the resonance that results in the positive charge being stabilized over five carbon atoms.
• B. The stability of the tropylium cation is due to the resonance that results in the positive charge being stabilized over six carbon atoms.
• C. The stability of the tropylium cation is due to the resonance that results in the positive charge being stabilized over seven carbon atoms.
• D. The stability of the tropylium cation is due to the resonance that results in an unpaired electron being stabilized over seven carbon atoms.

Answer: (C)