The synthesis of (eta~5-cyclopentadienyl)titanium(IV) alkoxides by alcoholysis of the Ti-pi-ligand bond in permethyl eta~3:eta~4-allyldiene-(eta~5-cyclopentadienyl)titanium(II)

摘要

The eta~3:eta~4-allyldiene-(eta~5-cyclopentadienyl)titanium(II) complex [Ti(eta~5-C_5Me_5){eta~3:eta~4-C_5Me_3(CH_2)_2}] (1) reacts with three molar equivalents of substituted propargylic alcohols FcC ident to CCMe_2(OH) (2a) and PhC ident to CCH_2OH (2b) at elevated temperature to give (eta~5-pentamethylcyclopentadienyl)titanium(IV) alkoxides [Ti(eta~5-C_5Me_5)(FcC ident to CCMe_2O-kO)_3] (3a) and [Ti(eta~5-C_5Me_5)(PhC ident to CCH_2O-kO)_3] (3b), respectively. The crystal structure of 3a has been determined by single-crystal X-ray diffraction.