Which structural formula does not represent benzene? a hexagon with nothing drawn inside it a hexagon with a dotted circle drawn inside it a hexagon with single and double dashes on alternating sides a hexagon with a circle drawn inside it?

            A hexagon with nothing drawn inside it does not represent Benzene.

Explanation:

Below attached picture contains structures mentioned in given option.

Structure of Option-A is shown in Red Color.

Structure of Option-B is shown in Blue Color.

Structure of Option-C is shown in Green Color.

Structure of Option-D is shown in Orange Color.

Result:
          Except Option-A, all structures represent Benzene. Option-A in fact shows the structure of Cyclohexane.

High-energy and unstable.