SCHEDULED MAINTENANCE
Synthesis, characterisation, crystal structure, reactivity and bonding
in titanium complexes containing
2,3,4,5-tetramethylpyrrolyl
Abstract
The complex
[Ti(η
5
-NC
4
Me
4
)Cl
3
]
1 has been synthesized, characterised and used as a precursor
for the preparation of the bis(pyrrolyl) complex
[Ti(η
5
-NC
4
Me
4
)
2
Cl
2
] 2 and the thiolate complexes
[Ti(η
5
-NC
4
Me
4
)(SPh)
3
]
3 and
[Ti(η
5
-NC
4
Me
4
)(SPh)Cl
2
]
4. The η
5
co-ordination of the heterocyclic ring
was predicted by the
13
C NMR data and confirmed by the
structure determination of complexes 1 and 3, which
present a piano-stool conformation and a slippage of the pyrrolyl
towards the titanium. The mixed-ring complex
[Ti(η
5
-C
5
H
5
)(η
5
-NC
4
Me
4
)Cl
2
] 5 has also been
synthesized and its structure determined, revealing a distorted
pseudo-tetrahedral geometry and slippage of the heterocyclic ring.
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