RT info:eu-repo/semantics/article
T1 Regioselective formation of
[2-(η5-cyclopentadienyl)-2-fluorenylpropane]-titanium complexes:
precursors, synthesis, structure and reactivity
A1 Dorado Moreno, Iván
A1 Flores Serrano, Juan C.
A1 Galakhov, Mikhail V.
A1 Gómez Sal, Pilar
A1 Martín Alonso, Avelino
A1 Royo Gracia, Pascual
K1 Bridged ligands
K1 Cyclopentadienyl
K1 Fluorenyl
K1 Titanium complexes
K1 Ciencia
K1 Química inorgánica
K1 Science
K1 Chemistry, inorganic
AB The 2-cyclopentadienyl-2-fluorenylpropane ligand has been converted into the monometalated derivatives M[CMe2(C5H4)(C13H9)] (M=Li, Tl,) and CMe2[C5H4(SiMe3)](C13H9). These alkylating reagents have been characterized, and used to synthesize a new series of organotitanium (IV) complexes. The trimethylsilyl derivative was treated with TiCl4 to give the monocyclopentadienyl compound [Ti{CMe2(η5-C5H4)(C13H9)}Cl3]. Reaction of the thallium derivative with [Ti(η5-C5R5)Cl3] afforded the ‘mixed-ring’ dicyclopentadienyl complexes [Ti{CMe2(η5-C5H4)(C13H9)}(η5-C5R5)Cl2] (R=H, Me), whereas the reaction of TiCl4 with two equivalents of the lithium compound led to the dicyclopentadienyl complex [Ti{CMe2(η5-C5H4)(C13H9)}2Cl2]. The monocyclopentadienyl compound [Ti{CMe2(η5-C5H4)(C13H9)}Cl3] was readily hydrolyzed to give [Ti{CMe2(η5-C5H4)(C13H9)}Cl2]2(μ-O) in wet acetone (0.5% H2O). The dicyclopentadienyl derivative [Ti{CMe2(η5-C5H4)(C13H9)}(η5-C5Me5)Cl2] was further converted into [Ti{CMe2(η5-C5H4)(C13H9)}(η5-C5Me5)Me2] by alkylation with LiMe. Structural data of the titanium complexes demonstrate the η5-coordination of the cyclopentadienyl ring of the ancillary ligand, whereas the fluorenyl ring is not coordinated to the metal center. This mode of coordination is confirmed by the X-ray crystal structure analysis of [Ti{CMe2(η5-C5H4)(C13H9)}2Cl2].
PB Elsevier
SN 0022-328X
YR 1998
FD 1998
LK http://hdl.handle.net/10017/4277
UL http://hdl.handle.net/10017/4277
LA eng
DS MINDS@UW
RD 24-abr-2024