There has never been any difficulty about the nomenclature of benzene and naphthalene derivatives. However, it was decades before a practical system for higher polycyclic hydrocarbons was developed. These latter systems were considered to consist of two fused ring systems having one ring in common Thus, the hydrocarbon (I) was called naphthanthracene and the linear hydrocarbon (II) naphthacene. The pentacyclic compound (III) was called dinaphthanthracene.
KeywordsHydrocarbon Pyrene Naphthalene Prefix Anthracene
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