INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY
ORGANIC CHEMISTRY DIVISION
Commission on Nomenclature of Organic Chemistry

REVISION OF THE EXTENDED HANTZSCH-WIDMAN SYSTEM OF NOMENCLATURE FOR HETEROMONOCYCLES


(Recommendations 1982)

Prepared for publication by W. H. Powell and published in Pure Appl. Chem., 1983, 55, 409-416.

http://www.chem.qmul.ac.uk/iupac/hetero/HW.html

World Wide Web version Prepared by G. P. Moss

Department of Chemistry, Queen Mary University of London,
Mile End Road, London, E1 4NS, UK
g.p.moss@qmul.ac.uk

These Rules are as close as possible to the published version [see W. H. Powell Pure Appl. Chem., 1983, 55, 409-416. Copyright IUPAC; reproduced with the permission of IUPAC]. If you need to cite these rules please quote this reference as their source. A PDF (183 kB) of the printed version is available.

See also Can. J. Chem., 1989, 67(6), v-viii (in French); Helv. Chim. Acta, 1990, 73, 1518-1523 (in French); Mag. Kem. Foly., 1988, 94, 291-310 (in Hungarian); Wiad. Chem., 1989, 43, 85-92 (in Polish) and Ann. Quim., 1992, 88, 590-595 (in Spanish).

For problems in converting the text into a World Wide Web version see the IUPAC home page.

Any comments, corrections or suggestions for a future edition should be e-mailed to g.p.moss@qmul.ac.uk

Contents

INTRODUCTION

Introduction
Discussion
Conclusions

RULES RB-1.1 and TABLES 1 and 2.

Recommendations
RB-1.1 Saturated Monocyclic with no more than Five Membered Rings with Nitrogen Atom(s)
Table I Prefixes for the Hantzsch-Widman System
Table II Stems for the Hantzsch-Widman System

RULES RB-1.2 to RB-1.5.

RB-1.2 Monocycle with up to ten ring members, one of which is a heteroatom
RB-1.3 Two or more atoms of the same heteroatom
RB-1.4 Two or more different heteroatoms
RB-1.5 Heteromonocycle with less than the maximum number of noncumulative double bonds

REFERENCES


Continued with Rules Hantzsch-Widman introduction

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