Page 34 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

IR-2.3 G R A M M A R

the rest of the formula or name. In dealing with aggregates or clusters, locant designators are
similarly separated.

Example:
2. Br

C

(CO)
Co 3
(OC) Co Co(CO) 3
3
m 3 -(bromomethanetriyl)-cyclo-tris(tricarbonylcobalt)(3 Co—Co)

(c) To separate locant designators from the rest of the name.

Example:
3. SiH 2 ClSiHClSiH 2 Cl 1,2,3-trichlorotrisilane

(d) To separate the labelling nuclide symbol from its locant in the formula of a s electively
labelled compound.

Example:
2
4. [1- H 1;2 ]SiH 3 OSiH 2 OSiH 3

(e) To separate the name of a b ridging ligand from the rest of the name.

Example:

5. OC O CO
C
OC CO
Fe Fe
OC CO
C C
O O
[Fe 2 (m-CO) 3 (CO) 6 ] t ri-m-carbonyl-bis(tricarbonyliron)(Fe—Fe)

IR-2.3.2 Plus and minus signs

The signs þ and are used to indicate the charge on an ion in a f ormula or name.

Examples:

1. Cl
2. Fe 3þ
3. [SO 4 ] 2
4. [Co(CO) 4 ] tetracarbonylcobaltate(1 )

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