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ansa-metallocene derivatives XXXII. Zirconocene complexes with a spirosilane bridge : syntheses, crystal structures and properties as olefin polymerization catalysts

ansa-metallocene derivatives XXXII. Zirconocene complexes with a spirosilane bridge : syntheses, crystal structures and properties as olefin polymerization catalysts

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MANSEL, Stefan, Ursula RIEF, Marc-Heinrich PROSENC, Robin KIRSTEN, Hans-Herbert BRINTZINGER, 1996. ansa-metallocene derivatives XXXII. Zirconocene complexes with a spirosilane bridge : syntheses, crystal structures and properties as olefin polymerization catalysts. In: Journal of Organometallic Chemistry. 512(1-2), pp. 225-236. ISSN 0022-328X. Available under: doi: 10.1016/0022-328X(95)06073-6

@article{Mansel1996ansam-23909, title={ansa-metallocene derivatives XXXII. Zirconocene complexes with a spirosilane bridge : syntheses, crystal structures and properties as olefin polymerization catalysts}, year={1996}, doi={10.1016/0022-328X(95)06073-6}, number={1-2}, volume={512}, issn={0022-328X}, journal={Journal of Organometallic Chemistry}, pages={225--236}, author={Mansel, Stefan and Rief, Ursula and Prosenc, Marc-Heinrich and Kirsten, Robin and Brintzinger, Hans-Herbert} }

ansa-metallocene derivatives XXXII. Zirconocene complexes with a spirosilane bridge : syntheses, crystal structures and properties as olefin polymerization catalysts Brintzinger, Hans-Herbert Mansel, Stefan 2013-07-31T06:32:20Z Kirsten, Robin Mansel, Stefan Rief, Ursula Brintzinger, Hans-Herbert Rief, Ursula eng Kirsten, Robin 2013-07-31T06:32:20Z Chiral ansa-zirconocene complexes with a trimethylene link between the Si bridge atom and an α-position of each C<sub>5</sub> ring ligand were prepared; two representatives, with i-propyl and t-butyl groups as β-substituents, were structurally characterized. The properties of these complexes with respect to MAO-activated propene polymerization were studied in comparison with those of their Me<sub>2</sub>Si-bridged analogs. The t-butyl-substituted spirosilane complex gives a polymer with relatively high content of 3,1-insertions. These increased regioirregularities appear to be associated with decreased coordination gap aperture and increased lateral extension angles of the spirosilane-bridged zirconocene complexes; this notion is supported by a molecular-mechanics analysis of alternative olefin-insertion transition states. Prosenc, Marc-Heinrich Journal of Organometallic Chemistry ; 512 (1996), 1-2. - S. 225-236 deposit-license 1996 Prosenc, Marc-Heinrich

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