Synthesis and Characterization of Titanium Complexes Containing Potentially Tridentate Amido-cyclopentadienyl Ligands

Two new titanium complexes of the general type Ti(η5:η1‐C5H4SiMe2NCH2CH2X)Cl2 (X = NMe2 OMe), containing a tridentate ligand, were prepared by reaction of Ti(η5‐C5H4SiMe2Cl)Cl3 with the lithium amide Li(NHCH2CH2X) (X = NMe2, OMe). The 1HNMR chemical shifts for the protons of the ethylene link were...

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Veröffentlicht in:	Chemische Berichte 1996-03, Vol.129 (3), p.275-277
Hauptverfasser:	Okuda, Jun, Du Plooy, Karen E., Massa, Werner, Kang, Hak-chul, Rose, Ulrich
Format:	Artikel
Sprache:	eng
Schlagworte:	Amido-cyclopentadienyl ligand Chelate effect Lewis acidity Titanium complexes Tridentate ligand
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Beschreibung
Zusammenfassung:	Two new titanium complexes of the general type Ti(η5:η1‐C5H4SiMe2NCH2CH2X)Cl2 (X = NMe2 OMe), containing a tridentate ligand, were prepared by reaction of Ti(η5‐C5H4SiMe2Cl)Cl3 with the lithium amide Li(NHCH2CH2X) (X = NMe2, OMe). The 1HNMR chemical shifts for the protons of the ethylene link were found to vary considerably as a function of the temperature, indicating the presence of an equilibrium between the tri‐ and bidentate bonding mode of the ligand. A single‐crystal X‐ray structural analysis of Ti(η5:η1C5H4SiMe2NCH2CH2OMe)Cl2 revealed that the methoxy function is not intramolecularly coordinated in the solid state.
ISSN:	0009-2940 1099-0682
DOI:	10.1002/cber.19961290305