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V. V. Izmer, D. S. Kononovich, D. V. Uborsky, P. S. Kulyabin, N. E. Shevchenko, A. Z. Voskoboynikov
Synthesis of a novel bridged dimethylsilyl
bis(indenyl) ligand and preparation of zirconium ansa-metallocene
complexes
Abstract
Ansa-type rac-
and meso-complexes of zirconium bearing
3-phenyl-6,7,8,9-tetrahydrocyclopenta[a]naphthalene fragments and
dimethylsililene bridge were obtained. The complexes were characterized by NMR
spectroscopy, and the structure of a rac-complex was established by
X-ray crystal structure analysis providing information about the shielding of
an active site by the ligand in the respective olefin polymerization catalyst.
Key words: metallocene catalysts of olefin
(co)polymerization, zirconocene complexes, rational design of ligands,
rac-selective synthesis, X-ray crystal structure analyses, sterical hindrance
of the active site.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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