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Aldehydes, Ketones, and their Derivatives

Carbocyclic and Heterocyclic Ketones Rule C-314

314.1 (Alternative to Rules C-315.1 and C-316.1) - Classical procedure: When in a cyclic compound a group >CH2 is replaced by >CO, but not otherwise, this change is denoted by attaching the suffix "-one", with elision of terminal "e" (if present), to the name of the ring system. Suffixes "-dione", "-trione", etc., denote similar replacement of two, three, etc., >CH2 groups by >CO.

Examples to Rule C-314.1

Note: The H for indicated hydrogen and its locant may be omitted when no ambiguity results; for example, 4H-Pyran-4-one may be named 4-Pyranone, or its contraction 4-Pyrone may be used.

See Recommendations'93 R-5.6.2

Ketones Rule C-315, Rule C-316, Rule C-317, Rule C-318
Ketenes Rule C-321
Acetals and Acylals Rule C-331, Rule C-332, Rule C-333


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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