Silylated 1,1‘-Diaminoferrocene:  Ti and Zr Complexes of a New Chelating Diamide Ligand

Silylation of 1,1‘-diaminoferrocene afforded 1,1‘-Fc(NHSiMe 3 ) 2 (LH 2 ) as red air-sensitive crystals. Reaction with M(CH 2 Ph) 4 (M = Ti, Zr) afforded the corresponding LM(CH 2 Ph) 2 (M = Zr; Ti), where the Fc(NSiMe 3 ) 2 2 - group serves as a diamide ligand. Alternatively, the magnesium salt LMg(THF) 2 was reacted with TiCl 4 (THF) 2 to give LTiCl 2 as purple air-sensitive crystals. Methylation of the latter with MeLi affords LTiMe 2 .