In chemistry, aliphatic compounds are non-aromatic organic compounds, in which carbon atoms are joined together in straight or branched chains rather than in benzene rings. The simplest aliphatic compound is methane (CH₄). Aliphatics include not only the fatty acids and other derivatives of paraffin hydrocarbons (alkanes), but also unsaturated compounds, such as ethylene (the alkenes) and acetylene (the alkynes). The most frequently found non-carbon atoms bound to the carbon chain include hydrogen, oxygen, nitrogen, sulfur, and various halides.

Alicyclic compounds such as cycloalkanes are aliphatic compounds that have one or more non-aromatic cycles in their chemical structure. Bicycloalkanes have two rings of carbon joined at one or two carbons.

Most aliphatic compounds have very exothermic combustion reactions, thus allowing hydrocarbons such as methane to fuel Bunsen burners in the laboratory, for example.

Examples

See also

• Aromatic compound
• Carbon-carbon bond

Organic compounds

أليفاتي | Hidrocarbur alifàtic | Alifatisk | Aliphat | Hidrocarburo alifático | Alifaattinen yhdiste | Aliphatique | Alifatik | Ациклические соединения | Alifatisk