aromatic hydrocarbon
Definition
Noun: A type of hydrocarbon whose molecular structure includes one or more rings of atoms with a specific, stable arrangement of electrons. This structure, known as an aromatic ring (most famously the benzene ring), gives these compounds distinctive chemical properties and often a strong, pleasant smell.
Usage
- Aromatic hydrocarbons are a fundamental class of compounds in organic chemistry.
- Benzene, toluene, and naphthalene are common examples of aromatic hydrocarbons.
- Many aromatic hydrocarbons are derived from petroleum and coal tar.
Examples
- Benzene (C₆H₆) is the simplest aromatic hydrocarbon.
- The distinctive odor of mothballs comes from the aromatic hydrocarbon naphthalene.
- Gasoline contains several aromatic hydrocarbons, such as toluene and xylene.
Advanced Usage
- Polycyclic Aromatic Hydrocarbons (PAHs): This term refers to aromatic hydrocarbons composed of multiple fused benzene rings. They are often formed during the incomplete combustion of organic matter and some are known environmental pollutants.
- Example: Scientists are studying the health effects of exposure to polycyclic aromatic hydrocarbons found in smoke.
Variants and Related Words
- Arene: A synonym often used in technical chemical nomenclature to refer to an aromatic hydrocarbon.
- Aryl Group: The functional group derived from an aromatic hydrocarbon by removing one hydrogen atom (e.g., a phenyl group, C₆H₅–, from benzene).
Synonyms
- Arene
- Aromatic compound (in a broader sense, as some aromatic compounds contain other elements besides carbon and hydrogen)
Related Phrases / Terms
- Benzene Ring: The hexagonal ring of six carbon atoms with alternating double bonds, which is the defining structural unit of most aromatic hydrocarbons.
- Aromaticity: The chemical property that describes the stability and unique bonding in aromatic rings.
Noun
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a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds
