Synthesis of sandwich and half-sandwich complexes of Ti, Zr and Hf containing η⁵-C5H4SiMe2Cl ligand. Molecular structure of [TiCl2(μ-OSiMe2-η⁵-C5H4)]2

Abstract Reactions of (C 5 H 4 SiMe 3 Cl ( 1 ) and (μ-SiMe 2 C 5 H 4 ) 2 ( 2 ) with Ti, Zr and Hf tetrachlorides lead to the complexes M( η 5 -C 5 H 4 SiMe 2 Cl)Cl 3 (M  Ti, 3a ; Zr, 3b ; Hf, 3c ). Treatment of 3a with cyclopentadienyl thallium afffords Ti( η 5 -C 5 H 5 )( η 5 -C 5 H 45 SiMe 2 Cl)Cl 2 ( 4 ). Dimeric oxo-derivative [TiCl 2 ( μ -OSiMe 2 - η 5 -C 5 H 4 )] 2 ( 5 ) was prepared by slow hydrolysis of 3a . Structure of 5 was determined by X-ray diffraction.