A substance the molecules of which contain one or more rings of compounds. In a homocyclic compound, all the atoms in the ring are the same; examples include benzene) (C6H6) and cyclohexane (C6H12). In a heterocyclic compound, there are different atoms in the ring; examples include pyridine (5H5N) and pyrrole (C4H5N).
Related category• ORGANIC CHEMISTRY
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