Illustrate the Frost circles for the cycloheptatrienyl anion and cycloheptatrienyl cation. Differentiate the two.

• A. The Frost circles show that the cycloheptatrienyl cation is antiaromatic, while the cycloheptatrienyl anion is aromatic.
• B. The Frost circles show that the cycloheptatrienyl cation is aromatic, while the cycloheptatrienyl anion is antiaromatic.
• C. The Frost circles show that the cycloheptatrienyl cation is antiaromatic, while the cycloheptatrienyl anion is aromatic.
• D. The Frost circles show that the cycloheptatrienyl cation is aromatic, while the cycloheptatrienyl anion is antiaromatic.

Answer: (D)