Substitutive Nomenclature

Numbering of Compounds Rule C-15.2

15.21 - For cyclic radicals, indicated hydrogen and thereafter the point of attachment (free valency) have priority for lowest available number, the requirements of the rules in Sections A and B have been satisfied. For acyclic radicals see Rules A-2.25, A-2.3, and A-3.5, to A-4.4.

Examples to Rule C-15.21


This HTML reproduction of Sections A, B and C of IUPAC "Blue Book" is as close as possible to the published version [see Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979. Copyright 1979 IUPAC.] If you need to cite these rules please quote this reference as their source.

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