No. of members
in the ring
Rings containing
Rings containing
no nitrogen
Unsaturation Saturation Unsaturation Saturation
(a) (a)
3 -irine -iridine -irene -irane (e)
4 -ete -etidine -ete -etane
5 -ole -olidine -ole -olane
6 -ine (b) (c) -in (b) -ane (d)
7 -epine (c) -epin -epane
8 -ocine (c) -ocin -ocane
9 -onine (c) -onin -onane
10 (f) -ecine (c) -ecin -ecane

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.

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