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Aldehydes, Ketones, and their Derivatives

Carbocyclic and Heterocyclic Ketones Rule C-318

318.1 - In the presence of a group having priority over carbonyl for citation as principal group, or when all the carbonyl groups cannot be included in the ketone functional class name, the presence of carbonyl-oxygen atoms is indicated by the prefixes "oxo-", "dioxo-", etc., or by use of the name of a carbonyl-containing radical. Such radicals are: (a) acyl radicals, for example, acetyl, valeryl, hexanoyl, benzoyl (see also Rule C-318.2); (b) oxo-substituted radicals; (c) certain radicals denoted by trivial names.

Examples to Rule C-318.1

Trivial names of radicals (see c above)

Complete names

318.2 - When two cyclic systems are directly linked by a carbonyl group and another group is also present that has priority for citation as principal group, the compound is named by one of the following methods: (a) The cyclic component having the larger number of groups with such priority is named as parent and the other is named as part of an acyl group substituted in it. (b) If the ring systems are identical and have the same number of groups with such priority the nomenclature for assemblies of identical units (Subsection C-0.7) is used with the name "carbonyl" to denote the bivalent >CO radical. (c) If different cyclic components have the same number of groups with such priority, the senior ring system is named as parent and the other is named as part of an acyl group substituted in it.

Examples to Rule C-318.2

See Recommendations'93 R-5.6.2

Next:
Ketenes Rule C-321
Acetals and Acylals Rule C-331, Rule C-332, Rule C-333
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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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