The synthesis of (η5-cyclopentadienyl)titanium(IV) alkoxides by alcoholysis of the Ti–π-ligand bond in permethyl η3:η4-allyldiene-(η5-cyclopentadienyl)titanium(II)
摘要:
The eta(3):eta(4)-allyldiene-(eta(5)-cyclopentadienyl)titanium(II) complex [Ti(eta(5)-C5Me5){eta(3):eta(4)-C5Me3(CH2)(2)}] (1) reacts with three molar equivalents of substituted propargylic alcohols FcCequivalent toCCMe(2)(OH) (2a) and PhCequivalent toCCH(2)OH (2b) at elevated temperature to give (eta(5)-pentamethylcyclopentadienyl)titanium(IV) alkoxides [Ti(eta(5) -C5Me5)(FcCequivalent toCCMe(2)O-kappaO)(3)] (3a) and [Ti(eta(5)-C5Me5) (PhCequivalent toCCH(2)O-kappaO)(3)] (3b), respectively. The crystal structure of 3a has been determined by single-crystal X-ray diffraction. (C) 2003 Elsevier Science B.V. All rights reserved.