Table C-V

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Table C-V Parent 'onium ions (not necessarily capable of independent existence), in order of decreasing preference for citation at the end of a name

Ion Parent cation Cation as prefix

Ammonium Ammonio-

Oxonium Oxonio-

Sulfonium Sulfonio-

Selenonium Selenonio-

Chloronium Chloronio-

Bromonium Bromonio-

Iodonium Iodonio-

Note: This Table lists also the prefixes required for Rules C-85.1, and C-87.1.

Example to Table C-V

Trimethylammonio

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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Ion	Parent cation	Cation as prefix

	Ammonium	Ammonio-
	Oxonium	Oxonio-
	Sulfonium	Sulfonio-
	Selenonium	Selenonio-
	Chloronium	Chloronio-
	Bromonium	Bromonio-
	Iodonium	Iodonio-