Aliphatic compounds, on the other hand, are organic substances whose carbon atoms link with one another in open chains, either straight or branched, as opposed to containing a benzene ring. Aromatic compounds are organic substances with a planar unsaturated ring of atoms that is stabilized by an interaction of the bonds forming the ring. As a result, the primary distinction between aromatic and aliphatic chemicals is that aromatic compounds lack a cyclic structure while aliphatic compounds have straight, branching, or cyclic structures. Additionally, while the majority of aliphatic molecules are odorless, all aromatic compounds have a sweet, pleasant fragrance.
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