Inverse cycloheptatrienyl sandwich complexes of uranium and neodymium
Abstract
Reaction of UX
4
(X = NEt
2
or
BH
4
) with K[C
7
H
9
] afforded the anionic
complexes
K[X
3
U(µ-η
7
∶η
7
-C
7
H
7
)UX
3
] whereas treatment of
[Nd(BH
4
)
3
(thf
)
2
]
(thf = tetrahydrofuran) with K[C
7
H
9
]
gave the neutral compound
[(thf)(BH
4
)
2
Nd(µ-η
7
∶η
7
-C
7
H
7
)Nd(BH
4
)(thf)
2
]. The formation of the
cycloheptatrienyl ligand resulted from the disproportionation reaction 3
C
7
H
9
-
→ C
7
H
7
3-
+ 2
C
7
H
10
. The crystal structure of
[(thf)(BH
4
)
2
Nd(µ-η
7
∶η
7
-C
7
H
7
)Nd(BH
4
)(thf)
3
], the first cycloheptatrienyl compound
of a 4f element, has been determined.
)
2
]
(thf = tetrahydrofuran) with K[C
7
H
9
]
gave the neutral compound
[(thf)(BH
4
)
2
Nd(µ-η
7
∶η
7
-C
7
H
7
)Nd(BH
4
)(thf)
2
]. The formation of the
cycloheptatrienyl ligand resulted from the disproportionation reaction 3
C
7
H
9
-
→ C
7
H
7
3-
+ 2
C
7
H
10
. The crystal structure of
[(thf)(BH
4
)
2
Nd(µ-η
7
∶η
7
-C
7
H
7
)Nd(BH
4
)(thf)
3
], the first cycloheptatrienyl compound
of a 4f element, has been determined.
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