Characteristic (Functional) Groups

R-3.2.2 Functional modifiers

Many derivatives of principal characteristic groups or functional parent compounds (see R-3.3) may be named by name modifiers which consist of one or more separate words placed after the name of the parent structure. This method is most useful in an indexing environment.

Note: For indexing purposes, this method is used in Beilstein for esters, acyl halides, amides, hydrazides, lactones, lactams and nitrogen derivatives of carbonyl compounds (oximes, hydrazones, etc.). For indexing purposes, this method is also used in Chemical Abstracts index nomenclature for anhydrides, esters, hydrazides, hydrazones and oximes.

Examples to R-3.2.2


Propanal dimethyl acetal

Propanal oxime

Propanal hydrazone

Propionic acid

Propionic acid methyl ester

Propionic acid hydrazide
Note: The use, in this section and elsewhere in this guide, of systematic names, such as propanal and propanoic acid, rather than retained names (see R-9.1), such as propionaldehyde and propionic acid, illustrates that, even though some names are retained, this does not preclude use of the systematic names.

This HTML reproduction is as close as possible to the published version [see IUPAC, Commission on Nomenclature of Organic Chemistry. A Guide to IUPAC Nomenclature of Organic Compounds (Recommendations 1993), 1993, Blackwell Scientific publications, Copyright 1993 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