Bring the power of IUPAC naming to your desktop!

ACD/Name (Chemist Version) offers a standardized set of features for quick and simple generation of IUPAC names, and structures from names. It is a streamlined version of our popular ACD/Name software.

View a full description and pricing on our web store.

Carboxylic Acids and their Derivatives

Simple Carboxylic Acids Rule C-402

402.1 - If an unbranched chain is linked directly to more than two carboxyl groups, these carboxyl groups are named from the hydrocarbon by substitutive use of the suffix "-tricarboxylic acid", etc. (compare Rule C-401.2). The principal chain should be linked directly to as many carboxyl groups as possible. The carboxyl groups which are not directly linked to the principal chain are expressed by "carboxyalkyl-" prefixes.

Examples to Rule C-402.1

In the last example, the principal chain is not the longest, but is the one directly linked to the greatest number of carboxyl groups.

See Recommendations'93 R-5.7.1

Simple Carboxylic Acids Rule C-403, Rule C-404, Rule C-405
Hydroxy, Alkoxy and Oxo Acids Rule C-411, Rule C-415, Rule C-416
Amino Acids Rule C-421
Amic acids Rule C-431
Peroxy Acids Rule C-441
Imidic, Hydrazonic, and Hydroxamic Acids Rule C-451
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.

Published with permission of the IUPAC by Advanced Chemistry Development, Inc.,, +1(416)368-3435 tel, +1(416)368-5596 fax. For comments or suggestions please contact