Aromatic hydrocarbons are a class of organic compounds that contain one or more benzene rings in their structure. These rings consist of six carbon atoms arranged in a hexagonal shape, with alternating double bonds. Aromatic hydrocarbons are known for their distinct scents and are commonly found in products like perfumes and fuels. These compounds are important in various industries, including petrochemicals and pharmaceuticals. Some well-known examples of aromatic hydrocarbons include toluene, xylene, and naphthalene. Due to their stability and unique properties, they play a significant role in chemical reactions and the production of many everyday materials.