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.

Heterocyclic Spiro Compounds

Rule B-11. Compounds: Method 2

11.1 - Heterocyclic spiro compounds are named according to Rule A-42, the following criteria being applied where necessary:(a) spiro atoms have numbers as low as consistent with the numbering of the individual component systems; (b) heterocyclic components have priority over homocyclic components of the same size; (c) priority of heterocyclic components is decided according to Rule B-3. Parentheses are used where necessary for clarity in complex expressions.

Examples to Rule B-11.1

Cyclohexanespiro-2'-(tetrahydrofuran)

Tetrahydropyran-2-spirocyclohexane

3,3'-Spirobi(3H-indole)

1,2,3,4-Tetrahydroquinoline-4-spiro-4'-piperidine

Hexahydroazepinium-1-spiro-1'-imidazolidine-3'-
spiro-1''-piperidinium dibromide

See Recommendations'93 R-2.4.3

Next:
Radicals

search

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., www.acdlabs.com, +1(416)368-3435 tel, +1(416)368-5596 fax. For comments or suggestions please contact webmaster@acdlabs.com