Ferrocene-derived ligands and their reactions with titanium, organotitanium, zirconium and organozirconium compounds

Reactions of 1-formylferrocene-4-methoxybenzoylhydrazone (HFfmbh) and 1-ace tylferrocene-4-methoxybenzoylhydrazone (HAfmbh) with TiCl4(thf)(2), ZrCl4(t hf)(2), (thf = tetrohydrofuran), (pi -C5H5)TiCl3, (pi -C5H5)TiCl2(OMe), TiC l2(OMe)(2) and (pi -C5H5)(2)ZrCl2 yield complexes of the types (Lig)(2)TiCl 2, (Lig)ZrCl2(thf), (pi -C5H5)Ti(Lig)(2)X, Ti(Lig)(2)X-2 and (pi -C5H5)Zr(L ig)(2)Cl (where HLig = HFfmbh and HAfmbh; X = Cl and OMe), Reaction of (Ffm bh)(2)TiCl2 with LiMe in benzene yields dimethyl derivative (Ffmbh)(2)TiMe2 , while that of (Ffmbh)(2)TiCl2 with PhMgBr in the affords organotitanium(I II) species (Ffmbh)(2)Ti(Ph)thf. On the other hand, reactions of (pi -C5H5) Ti(Ffmbh)(2)Cl, also synthesized in this study, with MeSH, Me3Si(NMe2), Me3 Si(N-3) and Me3SiC=C-Ph afford (pi -C5H5)Ti(Ffmbh)(2)L-1 (where L-1 = SMe, NMe2, N-3 and -C=C-Ph). Both the ligands function in a monobasic bidentate fashion in the complexes and the deprotonated enolic form of the ligand is involved in the coordination to the metal.