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.

Sulfoxides, Sulfones, and Sulfur Acids

Sultones and Sultams Rule C-671

671.1 - Compounds containing a group -SO2-O- as part of a ring are named as described in Rule C-472.3 forlactones but with the ending "-sultone" in place of "-carbolactone". The -SO2- group has priority over the -O- atom for lowest available number.

Examples to Rule C-671.1

671.2 - Compounds containing a group -SO2-N< as part of a ring are named by adding "-sultam" to the name of the hydrocarbon with the same number of carbon atoms. The -SO2- group has priority over the -NH- group for lowest available number.

Example to Rule C-671.2

671.3 - Sultones and sultams may alternatively be named as heterocyclic compounds by the rules of Section B, the oxygen attached to sulfur being denoted as "dioxide", with a locant.

Example to Rule C-671.3

See Recommendations'93 R-, R-

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