Question

Which of these is aromatic in nature?

• A. Cyclohexene
• B. Cyclopropene
• C. Benzene
• D. Non-aromatic

Hint:

To determine if a molecule is aromatic, check if it satisfies Hückel's rule: the molecule should have a cyclic, planar structure with a total number of π-electrons that is 4n + 2, where n is an integer.

Answer 1

The Correct Option is C

Aromaticity in chemistry refers to the special stability of certain cyclic compounds that follow Hückel's rule. According to Hückel's rule, a molecule is aromatic if it contains a planar ring structure with a total number of π-electrons that is a multiple of 4 + 2 (i.e., 6, 10, 14, etc.). - Option (a) Cyclohexene: This is not aromatic because it has a double bond but does not fulfill the required π-electron count or conjugation to be considered aromatic. - Option (b) Cyclopropene: This is also not aromatic because it does not follow Hückel's rule and is not planar. - Option (c) Benzene: Benzene is a classic example of an aromatic compound as it has a conjugated system of double bonds and follows Hückel's rule, having 6 π-electrons. - Option (d) Non-aromatic: This option is incorrect because it doesn’t refer to a specific molecule. Thus, benzene (option c) is the aromatic compound.