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.
Aromaticity in chemistry signifies the enhanced stability of specific cyclic compounds adhering to Hückel's rule. Hückel's rule posits that a molecule is aromatic if it features a planar ring structure containing a total number of π-electrons that is an integer multiple of 4 + 2 (e.g., 6, 10, 14).- Option (a) Cyclohexene: Not aromatic; it possesses a double bond but lacks the necessary π-electron count or conjugation for aromaticity.- Option (b) Cyclopropene: Not aromatic; it fails to comply with Hückel's rule and is non-planar.- Option (c) Benzene: A quintessential aromatic compound due to its conjugated double bond system and adherence to Hückel's rule with 6 π-electrons.- Option (d) Non-aromatic: An invalid choice as it does not identify a specific molecular entity.Consequently, benzene (option c) is identified as the aromatic compound.
