Page 118 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

IR-6.4 S U B S T I T U T I V E N O M E N C L A T U R E

In a n umber of cases, the established name of a s ubstituent g roup or radical is non-
systematic or is a s horter version obtained by replacing the ending ‘ ane’ o f t he parent name
by the suffix ‘yl’ or the suffix ‘ylidene’:

Examples:
10. OH * hydroxyl (for oxidanyl)
11. OH hydroxy ( for oxidanyl)
*
12. NH 2 aminyl (for azanyl)
13. NH 2 amino (for azanyl)
2 *
14. CH 2 methylidene (for methanylidene),
2
or l -methane, or carbene
*
15. SiH 3 and SiH 3 silyl (for silanyl)
*
16. GeH 3 and GeH 3 germyl (for germanyl)
*
17. SnH 3 and SnH 3 stannyl (for stannanyl)
*
18. PbH 3 and PbH 3 plumbyl (for plumbanyl)
2 *
19. SiH 2 silylidene

This list is exhaustive as far as non-carbon parent hydrides are concerned. A n umber of
established shortened o r e ntirely non-systematic names are also used for carbon-based
hydrides: m ethyl, e thyl, propyl, butyl, pentyl, hexyl, c yclohexyl, phenyl, naphthyl, etc.

IR-6.4.8 Substituted radicals or substituent groups
Radicals or substituent groups formally derived by removing one or more hydrogen atoms
and introducing substituents in parent hydrides are named using p refixes f or the substituents
as explained in Section IR-6.3.1. The positions from which the hydrogen atoms were r emoved
take priority over the positions with substituents. Several simple s uch radicals a nd substituent
groups are named in Table IX. In a f ew cases the name o f a r adical and the corresponding
substituent g roup as used in organic nomenclature may differ (see Example 2 b elow).

Examples:
*
1. NH 2 O and NH 2 O aminooxidanyl
2. HONH * hydroxyazanyl
HONH hydroxyamino
*
3. Me 3 PbPbMe 2 and Me 3 PbPbMe 2 1,1,2,2,2-pentamethyldiplumban-1-yl
(not 1,1,1,2,2-pentamethyldiplumban-2-yl)

IR-6.4.9 Anionic and c ationic centres and r adicals in a s ingle molecule or ion

If several of the above features [cationic moiety, anionic moiety, radical formed by removal
of hydrogen atom(s)] are present in a m olecule or ion, a r ule i s n eeded t o d ecide in which
order to cite the various modifications of the parent hydride name.

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