SCHEDULED MAINTENANCE
Synthesis and structure of bimetallic complexes with σ,π-bridging thienyl and benzothienyl ligands
Abstract
The ligand properties of the organometallic fragment
(η
5
-SC
4
H
3
)Cr(CO)
3
were
studied in the new σ,π-bimetallic complexes
[Cr{(η
5
-SC
4
H
3
)PtL
2
(SC
4
H
3
)}(CO)
3
] with
L = CO and PMe
3
1 or
L
2
= dppe [1,2-bis(diphenylphosphino)ethane] 2,
[Cr{(η
5
-SC
4
H
3
)Au(PPh
3
)}(CO)
3
] 3 and
[Cr(η
5
-SC
4
H
3
SnMe
3
)(CO)
3
] 4. Whereas the intermediates
[Cr{(η
5
-SC
4
H
3
)PtL
2
Cl}(CO)
3
] (L = PMe
3
or dppe)
and
[Pt{(SC
4
H
3
)Cr(CO)
3
}
2
L
2
] were too unstable to isolate and characterize, 4
slowly converted into
[Cr{η
5
-SC
4
H
2
(SnMe
3
)
2
}(CO)
3
] 5. By contrast, the reaction of
lithiated
[Cr(η
6
-SC
8
H
6
)(CO)
3
] with
[Pt(dppe)Cl
2
] afforded the stable trinuclear complex,
[Pt{(η
6
-SC
8
H
5
)Cr(CO)
3
}
2
(dppe)] 6.
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