Preparation of Ti(IV), Zr(IV) and Sn(IV) metal alkyls containing the (PriO)3SiCH2 fragment

By reaction of RMgCl (R=(PriO)3SiCH2) with Cp2TiCl2, Cp2ZrCl2 and SnCl4, the stable metal alkyls Cp2TiClR (1), Cp2TiR2, Cp2ZrR2 and SnR4 were obtained in high yield and characterized. The reactivity of 1 towards [Cu(CH3CN)4]PF6 (as Cl abstractor) was investigated and compared to previously reported cases. Cp2TiF2 was obtained quantitatively. By reaction of 1 with NaCo(CO)4 the compound Cp2RTiOTiClCp2 (2) was separated in very low yield. The crystal structures of 1 and 2 were also determined by X-ray diffraction methods.