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- W2105749556 abstract "In the continuously expanding panorama of Group 4 metallocene complexes and the extensive research devoted to their use as olefin polymerization catalysts, fluorenyl complexes of zirconium and hafnium play a very special role. This singularity can be explained in terms of a particularly versatile bonding potential of the fluorenyl ligand causing a facile change from η5 → η3 → η1 (ring slippage) and thus providing new coordination sites in catalytic cycles. The substitution of fluorenyl ligands in unbridged or bridged (ansa) metallocene complexes allows the variation of steric requirements and symmetry of these complexes. Both parameters have a strong influence on the catalytic activity and stereospecifity as soon as these catalyst precursors are activated with cocatalysts like methylalumoxane (MAO). Synthetic methods, X-ray structures and catalyst activities are discussed for several compounds together with updated literature." @default.
- W2105749556 created "2016-06-24" @default.
- W2105749556 creator A5035246423 @default.
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- W2105749556 date "1998-01-01" @default.
- W2105749556 modified "2023-10-16" @default.
- W2105749556 title "Fluorenyl complexes of zirconium and hafnium as catalysts for olefin polymerization" @default.
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- W2105749556 doi "https://doi.org/10.1039/a827323z" @default.
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