Which of the following compounds is non-aromatic?

Step-by-step solution

To determine whether a compound is aromatic, anti-aromatic, or non-aromatic, we apply Huckel's rule. A compound is aromatic if it is cyclic, planar, completely conjugated, and has (4n + 2) electrons. It is anti-aromatic if it meets the first three criteria but has 4n electrons. If it fails to be completely conjugated or planar, it is non-aromatic. Let us analyze each option: Option (A): The cyclooctatrienyl dication is an 8-membered ring with 3 double bonds and 2 positive charges. The positive charges provide empty