Synthesis and spectroscopic characterization of a series of substituted cyclopentadienyl Group 4 fluorides; crystal structure of the acetylacetonato complex [(acac) 2 (η-C 5 Me 5 )Zr(µ-F)SnMe 3 Cl]

A series of mono- and di-substituted cyclopentadienyl Group 4 fluorides [Ti{η-C5H3R(R′)-1,3}nFm], (n=m= 2 and n= 1, m= 3; R = H or SiMe3; R′= H, Me or SiMe3), [Ti(η-C5Me5)2F2] and [Zr(η-C5H5)2F2] have been prepared via the reaction of the corresponding chlorides with SnMe3F. The compounds have been characterized by means of 1H and 19F NMR, IR and mass spectroscopy and chemical analyses. The solvent dependence of the reactions using SnMe3F is discussed. To demonstrate the wide applicability of this fluorinating system the acetylacetonatofluoro complex [(acac)2(η-C5Me5)Zr(µ-F)SnMe3Cl] has been prepared and its crystal structure determined.