Appendix

R-9.1 Trivial and semisystematic names retained for naming organic compounds

· Type 1: Names that may be used when the structure is substituted at any position;

· Type 2: Names that may be used only when the structure is substituted in certain ways, for example, at a ring position;

· Type 3: Names that may not be used when the structure is substituted at any way.

The list in the tables of R-9.1 along with names generated according to recommendations in R-2 are to be considered limiting unless specified otherwise; however, use of trivial and semisystematic names for compounds covered by special rules, for example, amino acids, carbohydrates, steroids, and, in general, natural products and related compounds, is allowed. Contracted forms and substituent group names not derived by a systematic transformation are given. However, names of derivatives of parent structures formed by systematic transformation of the parent name, such as the addition of suffixes, are not included. Not all the names for parent ring structures given in the tables may be used to generate names for fused-ring structures; a comprehensive document dealing with nomenclature for fused- and bridged-ring parent structures is in preparation.

Table 19(a)	Acyclic and monocyclic hydrocarbons. Parent hydrocarbons.
Table 19(b)	Acyclic and monocyclic hydrocarbons. Substituent groups.
Table 20	Unsaturated polycyclic hydrocarbons.
Table 20(a)	Unsaturated polycyclic hydrocarbons. Priority order.
Table 21	Saturated polycyclic hydrocarbons.
Table 22	Polycyclic hydrocarbon substituent prefixes.
Table 23	Heterocyclic parent hydrides.
Table 23(a)	Heterocyclic parent hydrides. Priority of precedence.
Table 24	Hydrogenated heterocyclic parent hydrides.
Table 25	Heterocyclic substituent groups and cations.
Table 26(a)	Hydroxy compounds, ethers, and related substituent groups. Parent structures.
Table 26(b)	Hydroxy compounds, ethers, and related substituent groups. Substituent groups.
Table 27(a)	Carbonyl compounds and derived substituent groups. Parent structures.
Table 27(b)	Carbonyl compounds and derived substituent groups. Substituent groups.
Table 28(a)	Carboxylic acids and related groups. Unsubstituted parent structures.
Table 28(b)	Carboxylic acids and related groups. Hydroxy, oxo, and amino (not -amino) carboxylic acids.
Table 28(c)	Carboxylic acids and related groups. Amic acids and peroxy carboxylic acids.
Table 29(a)	Amines, nitrogenous heterocyclic parent structures, and derived substituent groups. Parent structures.
Table 29(b)	Amines, nitrogenous heterocyclic parent structures, and derived substituent groups. Derived substituent groups.
Table 30(a)	Sulfides, sulfonic acids, and derived substituent groups. Parent structures.
Table 30(b)	Sulfides, sulfonic acids, and derived substituent groups. Derived substituent groups.
Table 31(a)	Acyclic polynitrogen parent structures and derived substituent groups. Parent structures.
Table 31(b)	Acyclic polynitrogen parent structures and derived substituent groups. Derived substituent groups.
Table 32	Halogen compounds.

See Also:

R-9.0 Introduction
R-9.2 Bridge Names
R-9.3 "a" Prefixes Used in Replacement Nomenclature