Preparation and crystal structures of the complexes (η5-C5H4CMe2-η5-C13H8)MCl2 (M = Zr, Hf) and their role in the catalytic formation of syndiotactic polypropylene

Article abstract of DOI:10.1016/0022-328X(92)83400-C

The reactions of MCl4 (M = Zr, Hf) with the dilithium salt of 2-cyclopentadienyl-2-fluorenylpropane in pentane solution give the complexes (η⁵-C5H4CMe2-η⁵-C13H8)MCl2.NMR and X-ray diffraction data show that there are η⁵-bo