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=== Linear, Single-Stranded Polymers With Cyclic Aromatic Components === ...[polymers]] made with aromatic heterocycles.]]<br />[[Polymers]] made with aromatic monomers have a tendency to condense into chars upon [[combustion]], decrea

| Function = heterocycles Aromatic primary and secondary amines also react with ethylene oxide, forming the co

| ImageFileR1 = Benzene-aromatic-3D-balls.png ...s|synthesized]] from other compounds present in petroleum. Benzene is an [[aromatic hydrocarbon]] and the second [''n'']-[[annulene]] ([6]-annulene), a cyclic

...carbon atoms via [[methine]] bridges (=CH-). Porphyrins are [[aromaticity|aromatic]]. That is, they obey [[Hückel's rule]] for aromaticity, possessing 4n+2 Several other heterocycles are related to porphyrins. These include [[corrin]]s, [[chlorin]]s, [[bacte