The Aliphatic reference article from the English Wikipedia on 24-Jul-2004
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Aliphatic

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In chemistry, hydrocarbon compounds having an open chain structure (this is, non-aromatic) are called aliphatic (synonyms: acyclic, open chain); they include not only the fatty acids and other derivatives of the paraffin hydrocarbons, but also unsaturated compounds, such as the ethylene (alkene) and acetylene (alkyne) series.

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