Determine if the cation below is aromatic, antiaromatic, or nonaromatic. If it is aromatic, determine its n in Hückel's rule. If not, explain how it breaks the aromaticity rule.

• A. The cation is aromatic. Its n is 2.
• B. The cation is aromatic. Its n is 4.
• C. The cation is antiaromatic. It breaks the aromaticity rule because it does not have a (4n + 2) number of π electrons.
• D. The cation is nonaromatic. It breaks the aromaticity rule because it is not planar.

Answer: (C)