Page 27 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

O R G A N O M E T A L L I C C O M P O U N D S IR-10.2

tradition in organic and organometallic chemistry, and its major advantage is that names
used in common practice for organic groups can be applied unchanged.
There are two m ethods for constructing substituent g roup names from parent hydride
names:
(a) The suffix ‘yl’ replaces the ending ‘ane’ o f t he parent hydride name. If the parent
hydride is a c hain, the atom with the free valence is understood to terminate t he chain.
In all cases that atom has the locant ‘1’ (which i s o mitted from the name). This method
is employed for saturated acyclic and monocyclic hydrocarbon substituent g roups and
for the mononuclear parent hydrides of silicon, germanium, tin and lead.

Examples:

6. CH 3 methyl
7. CH 3 CH 2 ethyl
8. C 6 H 11 cyclohexyl

9. CH 3 CH 2 CH 2 CH 2 butyl
10. CH 3 CH 2 CH 2 C(Me)H 1-methylbutyl
11. Me 3 Si trimethylsilyl

The compound [TiCl 3 Me] would be called trichlorido(methyl)titanium by this method.

(b) In a m ore g eneral method, the suffix ‘yl’ i s a dded to the name o f t he parent hydride
with elision of the terminal ‘e’, i f p resent. T he atom with the free valence is given a
number as low as is consistent with the established numbering of the parent hydride.
The locant number, including ‘1’, must always be cited. (See Section P-29 of Ref. 3 f or
a m ore complete discussion of substituent group names.)

Examples:

12. CH 3 CH 2 CH 2 C(Me)H pentan-2-yl (cf. E xample 10 above)
13. CH 2 ¼CHCH 2 prop-2-en-1-yl

In fused p olycyclic hydrocarbons a s w ell as in heterocyclic systems, special numbering
schemes are adopted (see Section P-25 of Ref. 3).

Examples:

14.

naphthalen-2-yl

15.
1H-inden-1-yl

H

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