International Union of Pure and Applied Chemistry.
Commission on Nomenclature of Organic Chemistry

Extension and Revision of the Nomenclature for Spiro Compounds

(Recommendations 1999)

Prepared for publication by: G. P. Moss.

Membership of the Working Party (1992-1998): P. M. Giles, Jr. (USA), E. W. Godly (UK), K.-H. Hellwich (Federal Republic of Germany), A. K. Ikizler (Turkey), M. V. Kisakürek (Switzerland), A. D. McNaught (UK), G. P. Moss (UK), J. Nyitrai (Hungary), W. H. Powell (USA), O. Weissbach (Federal Republic of Germany), A. Yerin (Russia).

World Wide Web version Prepared by G. P. Moss
School of Physical and Chemical Sciences, Queen Mary University of London,
Mile End Road, London, E1 4NS, UK

These Rules are as close as possible to the published version [see G P Moss Pure Appl. Chem., 1999, 71, 531-558. Copyright IUPAC; reproduced with the permission of IUPAC]. If you need to cite these rules please quote this reference as their source. In preparing the web version some errors were detected. These have been corrected and marked by error details which is a link to details of the change and where it applies.

A PDF is available.

German translation see Angew. Chem., 2002, 114, 4073-4089.

Any comments, corrections or suggestions for a future edition should be e-mailed to


SP-0 Spiro
SP-1 Compounds with only monocyclic ring components

SP-1.1 Naming monospiro systems
SP-1.2 Numbering monospiro systems
SP-1.3 Heteroatoms
SP-1.4 Unbranched polyspiro systems
SP-1.5 Branched polyspiro systems
SP-1.6 Three rings with one spiro atom
SP-1.7 Polyspiro systems with a spiro atom connected to three rings
SP-1.8 Choice of numbering

SP-2 Monospiro compounds containing two identical polycyclic components
SP-3 Three identical components spiro-fused together
SP-4 Monospiro compounds with different components at least one of which is polycyclic
SP-5 Unbranched polyspiro compounds with at least two different components and at least one of which is polycyclic
SP-6 Branched polyspiro compounds with at least one polycyclic component
SP-7 Spiro systems containing atoms with non-standard valency
SP-8 Ionic Spiro Atom
SP-9 Stereochemistry

Continue with Synopsis, Preamble, SP-0 and SP-1.

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