TITANIUM HYDROCARBYL COMPLEXES WITH A LINKED CYCLOPENTADIENYL-ALKOXIDE ANCILLARY LIGAND - PARTICIPATION OF THE LIGAND IN AN UNUSUAL ACTIVATION OF A (TRIMETHYLSILYL)METHYL GROUP

The titanium complexes [eta(5):eta(1)-C5Me4(CH2)(3)O]TiR2 (R = CI, Me, CH2Ph, CH2CMe3, CH2SiMe3), with a linked Cp-alkoxide ancillary ligand , have been prepared in good yield. Cationic [C5Me4(CH2)(3)O]Ti(eta(2) -CH2Ph)(+) catalyzes the polymerization of propene to atactic polyprop ene. B(C6F5)(3) reacts with [C5Me4(CH2)(3)O]Ti(CH2SiMe3)(2) by Me abst raction from one of the CH2SiMe3 groups accompanied by an, attack of t he ligand alkoxide functionality on the Si atom of this group.