Introduction

R-0.2.3 Names

Example to R-0.2.3.1

Urea (R-9.1, Table 31(a))

Examples to R-0.2.3.2

Glycerol (ol) (R-9.1, Table 26(a))

Acetone (one) (R-9.1, Table 27(a))

Styrene (ene) (R-9.1, Table 19(a))

5-Cholestane (ane) (R-2.4.6)

R-0.2.3.3.1 Fusion name: a composite name for a polycyclic parent structure having the maximum number of noncumulative double bonds and at least one ortho fusion. Name formation involves the dissection of the structure into contiguous components having recognized trivial or semisystematic names, one of which is selected as the "base component". Attachment of the other component(s) is described by prefixes (see R-2.4.1.).

Examples to R-0.2.3.3.1

Dibenzo[b,e]oxepine (R-2.4.1)

Thieno[3,2-b]furan (R-2.4.1)

1,3-Dithiolane (R-2.3.3)

1,4-Thiazepine (R-2.3.3)

R-0.2.3.3.3 Functional class name: a name that expresses a characteristic group as a class term written as a separate word following the name of a parent structure or a name derived from a parent structure. In the latter case, when the derived name is that for a substituent group (formerly called a "radical"), the method has been called "radicofunctional nomenclature" (see R-1.2.3.3.2).

Examples to R-0.2.3.3.3

Methyl iodide (R-5.3.1)

Ethyl alcohol (R-5.5.1.1)

Ethyl methyl ketone (R-5.6.2.1)

Acetyl chloride (R-5.7.6)

Trimethylarsane sulfide (R-1.2.3.3.1)

Propanal hydrazone (R-5.6.6.2)

Ethyl acetate (R-5.7.4.2)

R-0.2.3.3.5 Replacement name: a name in which the replacement of an atom or a group of a parent structure by another atom or group is indicated by affixes attached to or inserted into the name of the parent structure. There are two main types of replacement names.

(a) Skeletal replacement name: a name in which the replacement of skeletal atoms and their associated hydrogen atom of a parent hydride by other atoms with the appropriate number of hydrogen atoms is indicated by nondetachable prefixes. When carbon atoms are replaced by heteroatoms (see R-1.2.2), this method has been called "a" nomenclature, since the prefixes used end in "a".

Examples to R-0.2.3.3.5(a)

Silacyclohexane (R-1.2.2.1)

2,7,9-Triazaphenanthrene (R-1.2.2.1)

Examples to R-0.2.3.3.5(a)

2H-Thiopyran (R-1.2.2.2)

Examples to R-0.2.3.3.5(b)

Selenobenzoic acid (R-5.7.4.2)

Hexane(dithioic) acid (R-5.7.4.2)

Methyl P,P-dimethylphosphinimidate (R-1.2.2.2)

Examples to R-0.2.3.3.6

9,10-Diphenylanthracene (R-5.1.1)

Butane-1,4-diol (R-5.5.1.1)

Ethylphosphonic acid (R-5.7.3.1)

N-Methylbezamide (R-5.7.8.1)

Examples to R-0.2.3.3.7

Cyclohexaneethanol (R-1.2.4.1)

Benzene-1,3,5-triacetic acid (R-1.2.4.1)

(a) the formal assembly of names for the components of a compound without loss of atom or groups of atoms from any component, as in the following:

Functional class name:

Styrene oxide (R-1.2.3.3.1)

Methyl iodide (R-5.3.1)

Ethyl methyl ether (R-5.5.4)

Ring assembly names:

Biphenyl (R-2.4.4)

2,2'-Bipyridyl (R-2.4.4)

Acyclic "assembly" name:

Biacetyl (R-9.1, Table 27(a))

Salt name:

Calcium diacetate (R-5.7.4.1)

[2-(Ethoxycarbonyl)ethyl]trimethylammonium bromide (R-5.7.5.2)

Compound substitutive or multiplicative prefixes:

Pentyloxy (R-5.5.2)

Methylenedioxy (R-5.5.2)

(b) the addition or attachment of atoms or groups of atoms, as illustrated by the following:

Skeleton modifying name:

(R-1.2.3.1)

Prefixes or suffixes that increase the number of substitutable hydrogen atoms of a parent hydride, such as hydro- and -ium:

Examples to R-0.2.3.3.8

2,3,4,5-Tetrahydroazocine (R-3.1.2)

Pyridinium (R-1.2.3.2)

Prefixes: de-, anhydro-, nor-.

Suffixes that decrease the number of substitutable hydrogen atoms of a parent structure: -ene, -yne, -ylium, -yl, -ide.

Examples to R-0.2.3.3.9

Demethylmorphine (R-1.2.5.1)

3-Norlabdane (R-1.2.5.1)

Hex-2-ene (R-3.1.1)

Methyl (R-5.8.1.1)

Examples to R-0.2.3.3.10

4,4'-Peroxydibenzoic acid (R-5.5.5)

[Oxybis(ethyleneoxy)]diacetic acid (R-4.2.6)

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R-0.2.4 Other terms used in these recommendations