Chemistry Reference
In-Depth Information
Fig. 24 Examples of bridging thiolato- and metallothiolato-ligands. The dative bonds are indi-
cated by
arrows
and aurophilic interactions by
dotted lines
Fig. 25 Schematic illustration of the building up of the surface thiolato-gold ligand layer by the
addition of neutral AuSR molecules which do not affect the core geometry or electron count and
maintain equivalent surface-core metal ligand bonding
The series [Au
m
(PR
3
)
2
n
]
q
+
: [
m
(SR)
n
]
(
qn
)+
: [Au
m
+
n
(SR)
2
n
]
(
qn
)+
:
[Au
m
+2
n
(SR)
3
n
]
(
qn
)+
have Au
m
central cores which are isostructural and
n
or 2
n
gold atoms involved in the staple ligands. Some specific examples will serve to
introduce the procedure.
3.7.1
Icosahedral-Based Structures [
32
,
33
]
A
centred icosahedron
, which has a skeletal electron count (sec) of 8, is exempli-
fied by [Au
13
Cl
2
(PMe
2
Ph)
10
]
3+
and may related to an isoelectronic organothiolato-
cluster as follows:
