Stereorigid titanocene and zirconocene derivatives. Synthesis and crystal structure of the dialkyl complex 5-η5-(C5H4)2Si(CH3)2>Ti2

Article abstract of DOI:10.1016/0022-328X(90)85219-O

Reaction of M'2<(η⁵-C5H4)2Si(CH3)2> (M'=Li, Na, K) with MCl4 produced the known complexes <(η⁵-C5H4)2Si(CH3)2>MCl2 (M=Ti (1) and Zr (2)).Along with the predominant product in each case a new titanium and zirconium compound is isolated.Treatment of the complexes 1 and 2 with LiCH2Si(CH3)3 gives the novel derivatives <(η⁵-C5H4)2Si(CH3)2>M2 (M=Ti (4) and Zr (5)) which have been characterized by NMR and mass spectrometry and in the case of 4 by an X-ray structural determination.