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Method (b) has also been used for naming ring assemblies connected by a double bond. The presence of a double bond was indicated by the capital Greek letter and the point of attachment on the ring was given by superscript locant numbers. This method is not continued in these recommendations; accordingly, assemblies of three or more identical ring systems interconnected by double bonds cannot be named as ring assemblies.

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This HTML reproduction is as close as possible to the published version [see IUPAC, Commission on Nomenclature of Organic Chemistry. A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993), 1993, Blackwell Scientific publications, Copyright 1993 IUPAC]. If you need to cite these rules please quote this reference as their source.

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