Abstract: Reactions of lithiat ed sila bridged ligands LI₂[E(C₅H₃SiMe₃)₂]with TiCl₄2T HF lead to The formation of complexes[E(C₅H₃SiMe₃)₂]TiCl₂[E=Me₂SiSiMe₂(3), Me₂SiOSiMe₂(5)]. The unsymmetrical ansat it anocenes[E(C₅H₄)(C₅H₃SiMe₃)]TiCl₂[E=Me₂SiSiMe₂(4), Me₂SiOSiMe₂(6)]were also isolated simult aneously as desilylation products.Among Them, disilox ane bridged ligand is easier to occur the desilylation reaction.Complexes 36 were character ized by ¹HNMR, mass spectra and elemental analyses.

Key words: Ansa metallocene, Sila bridged, Tit anocene, Desily lation