Page 90 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

IR-5.6 C O M P O S I T I O N A L N O M E N C L A T U R E

2
3
terms ‘deuterate’ and tritiate’ are not acceptable for addition compounds of H 2 O a nd H 2 O
or other isotope-modified water species. Example 3 s hows a formula and a n ame for a
compound of the present type with isotope modification. In this case the modified
component formula a nd name are presented according to the rules of Section II-2.3.3
of Ref. 3.

Examples:

1. BF 3 ·2H 2 O b oron trifluoride— w ater (1/2)
2. 8Kr·46H 2 O k rypton—water (8/46)
3
3. 8Kr·46 H 2 O 3 k rypton— ( H 2 )water (8/46)
calcium chloride— a mmonia ( 1/8)
4. CaCl 2 ·8NH 3
5. AlCl 3 ·4EtOH a luminium chloride— e thanol (1/4)
6. BiCl 3 ·3PCl 5 bismuth(III) chloride—
phosphorus(V) chloride (1/3)
sodium carbonate—hydrogen
7. 2Na 2 CO 3 ·3H 2 O 2
peroxide (2/3)
8. Co 2 O 3 ·nH 2 O c obalt(III) oxide— w ater (1/n)
9. Na 2 SO 4 ·10H 2 O s odium sulfate—water (1/10),
or sodium sulfate d ecahydrate

10. Al 2 (SO 4 ) 3 ·K 2 SO 4 ·24H 2 O a luminium sulfate—potassium
sulfate— w ater (1/1/24)
11. AlK(SO 4 ) 2 ·12H 2 O a luminium potassium bis(sulfate)
dodecahydrate
12. 3CdSO 4 ·8H 2 O c admium sulfate— w ater (3/8)

There is no difference between donor-acceptor complexes and coordination compounds
from a n omenclature point of view. Thus, for such systems an additive name s uch as
described in Sections IR-7.1 to IR-7.3 and in Chapter IR-9 may be given.

Example:

13. BH 3 ·(C 2 H 5 ) 2 O o r [ B{(C 2 H 5 ) 2 O}H 3 ] b orane—ethoxyethane (1/1),
or (ethoxyethane)trihydridoboron

In Section P-68.1 of Ref. 4, a s lightly different nomenclature is presented for organic donor-
acceptor complexes.

IR-5.6 S U M M A R Y

Compositional names are either of the stoichiometric type (which, furthermore, are of the
binary type except i n t he case of homoatomic s pecies) o r o f t he addition compound type.
Compositional nomenclature is used if little or no structural information is to be conveyed

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