Chemistry Reference
In-Depth Information
Figure 4.39
Structure of [Mo
2
-
OPr
i
3
OPr
i
2
N
2
CPh
2
py
](Hatoms
omitted).
Figure 4.40
Mo
2
-C
2
H
2
-
O
2
O
4
N
2
core structure of [Mo
2
-
C
2
H
2
-OPr
i
2
OPr
i
4
py
2
].
of excess acetylene produced [Mo
2
-C
4
H
4
-OCH
2
Bu
t
(OCH
2
Bu
t
5
(py)] in which
one Mo is part of a molybdacyclopentadiene moiety and is further bonded to a bridging
Bu
t
CH
2
O, two terminal Bu
t
CH
2
O ligands and a pyridine whilst the other Mo is bonded
to a bridging Bu
t
CH
2
O ligands and
-bonds to the metallocycle.
Further research on the carbonylation of Mo
2
OR
6
in the presence of Lewis bases
L gave the dimer [Mo
2
-CO
-OPr
i
2
OPr
i
4
py
2
] which has the confacial bi-
octahedral structure with
-CO and two
-OPr
i
bridges.
234
The pyridine ligands are
trans
to the carbonyl ligand. The structure of the mixed ligand (MoMo) dimer
