Page 178 - Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005)

IR-9.2 C O O R D I N A T I O N C O M P O U N D S

Example:
3. 2−
S FeSPh
PhSFe S
PhSMo S
S MoSPh
[Mo 2 Fe 2 S 4 (SPh) 4 ] 2
tetrakis(benzenethiolato)-1kS,2kS,3kS,4kS-tetra-m 3 -sulfido-
3
3
3
3
1:2:3k S;1:2:4k S;1:3:4k S;2:3:4k S-(dimolybdenumdiiron)ate(2 )
Using the rules above, no distinction is obtained between the two molybdenum atoms or
between t he two iron atoms. However, no distinction is needed.
Example:
4. H 6+
O
Co Co(NH )
3 4
O
H 3

[Co{(m-OH) 2 Co(NH 3 ) 4 } 3 ] 6þ
4
4
4
dodecaammine-1k N,2k N,3k N-hexa-m-hydroxido-
4
4
4
1:4k O;2:4k O;3:4k O-tetracobalt(6þ)
Rules (a) and (b) do not r esult in a d istinction between the four cobalt a toms. By rule (c),
however, t he three peripheral cobalt atoms are assigned numbers 1, 2 a nd 3 b ecause they
carry the ammine ligands appearing first in the name, and the central cobalt a tom is thus
number 4. This is all that is required t o c onstruct the name, because of the symmetry of the
complex.

Examples:
5. 3+
H N 2 NH 3 O
3
H N Co O
3
H 2 O
HO OH C
3 N OH 2
H N Co O Cr 1
3
H N NH 3
3
N O
O
O
O

2
3
3
0
hexaammine-2k N,3k N-aqua-1kO-{m 3 -(ethane-1,2-diyldinitrilo-1k N,N )-
0
4
1
3
3
4
2
4
tetraacetato-1k O ,O ,O :2kO :3kO }-di-m-hydroxido-2:3k O-
chromiumdicobalt(3þ)
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