Aromatic Hydrocarbons
| Formula / Notation | CₙH₂ₙ₋₆; benzene: C₆H₆ |
|---|---|
| Also Known As | Arenes, aromatic compounds, benzenoid hydrocarbons, PAHs (polycyclic) |
What is Aromatic Hydrocarbons?
Aromatic hydrocarbons are cyclic organic compounds containing conjugated pi electrons that satisfy Hückel's rule (4n+2 π electrons). Benzene (C₆H₆) is the prototype aromatic compound. Aromatic compounds are unusually stable due to electron delocalisation and undergo electrophilic substitution rather than addition reactions. They include benzene, toluene, naphthalene, and many biologically important molecules.
Formula & Notation
Other Names / Synonyms: Arenes, aromatic compounds, benzenoid hydrocarbons, PAHs (polycyclic)
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Aromatic hydrocarbons are cyclic organic compounds containing conjugated pi electrons that satisfy Hückel's rule (4n+2 π electrons). Benzene (C₆H₆) is the prototype aromatic compound. Aromatic compounds are unusually stable due to electron delocalisation and undergo electrophilic substitution rather than addition reactions. They include benzene, toluene, naphthalene, and many biologically important molecules.
Benzene, toluene, and xylene (BTX) are industrial feedstocks for plastics, synthetic fibres, dyes, and pharmaceuticals. Naphthalene is used in mothballs and dye synthesis. Aromatic rings are ubiquitous in drug molecules, natural products, and polymers such as polystyrene and Kevlar.
Many aromatic hydrocarbons are toxic, carcinogenic, or mutagenic. Benzene is a Class 1 IARC carcinogen (causes leukaemia). Polycyclic aromatic hydrocarbons (PAHs) are carcinogenic combustion byproducts. Always work with aromatic solvents in a fume hood with appropriate PPE.
The formula or notation for Aromatic Hydrocarbons is: CₙH₂ₙ₋₆; benzene: C₆H₆