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Carboxylic Acids and their Derivatives

Imidic, Hydrazonic, and Hydroxamic Acids Rule C-451

451.1 - The name of an acid in which the carbonyl-oxygen atom of a carboxyl group has been replaced by =NH, =N-NH2, or -N-OH is formed by modifying the ending "-oic" or "-carboxylic" of the systematic name of the carboxylic acid, or the ending "-ic'' of the trivial name, as shown in Table X. A letter "o" is added for euphony between "h" and a preceding consonant.

Examples to Rule C-451.1

451.2 - Radicals RC(=X)-, where =X is =NH, =N-NH2, or =NOH, are formed from the names of the corresponding acids RC(=X)-OH by changing "-ic" of the endings given in Table X to "-oyl".

Examples to Rule C-451.2

451.3 - The name of an acid in which the hydroxyl group of the carboxyl group has been changed to -NH-OH is formed by changing the ending "-oic acid '' of the systematic name of the carboxylic acid, or "-ic acid '' of the trivial name, to "-ohydroxamic acid", or "-carboxylic acid'' to "-carbohydroxamic acid''. (However, see also Rule C-841.3.)

Examples to Rule C-451.3

451.4 - The hypothetical compound HN=C(OH)2 is named carbonimidic acid, and the bivalent radical >C=NH is named carbonimidoyl.

Example to Rule C-451.4

See Recommendations'93 R-5.7.1

Salts and Esters Rule C-461, Rule C-462, Rule C-463, Rule C-464
Lactones, Lactides, Lactams, and Lactims Rule C-471, Rule C-472, Rule C-473, Rule C-474, Rule C-475
Acyl Halides Rule C-481
Acid Anhydrides Rule C-491

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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