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Exceptional Characteristic Groups
Rule C-11.1 Carboxylic Acids 11.11 - (a) The atom =O and the group -OH on one and the same carbon atom are together denoted by a suffix "-oic" attached to the
name of the parent aliphatic chain and the word "acid" is added thereafter. Thus the change "-ane" to "-anoic acid" denotes the change of -CH3 to -COOH. For
numbering see Rule C-401.1.
(b) The group -COOH is treated as a complete Substituent, denoted by the ending "carboxylic acid", which includes the carbon atom of the carboxyl group. For numbering see Rule
Example to Rule C-11.11 (a)
Examples to Rule C-11.11 (b)
Derivatives and Radicals from Carboxylic Acids
Aldehydes and Nitriles
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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