The traditional names obtained on the basis of Rule A-21.4 and Rule A-23.5 of IUPAC Nomenclature of Organic Chemistry
, "6,7-Dihydro-5H-benzocycloheptene" and "Benzocyclohepta-1,3-diene", could lead to ambiguity. They are no longer encouraged. For an explanation of the use "annulene" as the
base component in these names, see section R-22.214.171.124.
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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