@article{Barsties1996ansam-23917,
  year={1996},
  doi={10.1016/0022-328X(96)06263-8},
  title={ansa-metallocene derivatives XXXIII. 2-Dimethylamino-substituted bis-indenyl zirconium dichloride complexes with and without a dimethylsilyl bridge : syntheses, crystal structures and properties in propene polymerization catalysis},
  number={1-2},
  volume={520},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={63--68},
  author={Barsties, Elke and Schaible, Stefan and Prosenc, Marc-Heinrich and Rief, Ursula and Röll, Werner and Weyand, Oliver and Dorer, Birgit and Brintzinger, Hans-Herbert}
}

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    <dc:creator>Rief, Ursula</dc:creator>
    <dcterms:bibliographicCitation>Journal of Organometallic Chemistry ; 520 (1996), 1-2. - S. 63-68</dcterms:bibliographicCitation>
    <dc:creator>Weyand, Oliver</dc:creator>
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    <dc:contributor>Prosenc, Marc-Heinrich</dc:contributor>
    <dc:creator>Barsties, Elke</dc:creator>
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    <dc:creator>Prosenc, Marc-Heinrich</dc:creator>
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    <dc:creator>Röll, Werner</dc:creator>
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    <dc:creator>Schaible, Stefan</dc:creator>
    <dc:rights>terms-of-use</dc:rights>
    <dc:contributor>Brintzinger, Hans-Herbert</dc:contributor>
    <dc:contributor>Rief, Ursula</dc:contributor>
    <dc:contributor>Barsties, Elke</dc:contributor>
    <dcterms:abstract xml:lang="eng">Bis(2-N,N-dimethylamino-indenyl) zirconium dichloride, (2-(CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;N-C&lt;sub&gt;9&lt;/sub&gt;H&lt;sub&gt;6&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt;, and dimethylsilyl-bridged bis(2-N,N-dimethylamino-indenyl) zirconium dichloride, (CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Si(2-(CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;N-C&lt;sub&gt;9&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt;, were prepared by reaction of the corresponding ligand lithium salts with ZrCl&lt;sub&gt;4&lt;/sub&gt; in toluene. Diffractometric structure determinations reveal C&lt;sub&gt;2&lt;/sub&gt;-symmetric complex geometries for both complexes. An increased electron density at the Zr center of the dimethylamino-substituted complexes is indicated by reduction potentials which are 0.3–0.4 V more negative than those of their unsubstituted analogs. When activated with methyl aluminoxane in toluene solution, (CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;Si(2-(CH&lt;sub&gt;3&lt;/sub&gt;)2N-C&lt;sub&gt;9&lt;/sub&gt;H&lt;sub&gt;5&lt;/sub&gt;)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt; catalyzes the polymerization of propene to polymers with a microstructure comparable with that of polymers produced with other Me&lt;sub&gt;2&lt;/sub&gt;Si-bridged bis(indenyl)ZrCl&lt;sub&gt;2&lt;/sub&gt; complexes, but with a substantially increased fraction of i-propyl end groups derived from alkyl exchange between Zr-polymer and AlMe species.</dcterms:abstract>
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    <dc:creator>Brintzinger, Hans-Herbert</dc:creator>
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    <dc:contributor>Röll, Werner</dc:contributor>
    <dc:contributor>Schaible, Stefan</dc:contributor>
    <dcterms:title>ansa-metallocene derivatives XXXIII. 2-Dimethylamino-substituted bis-indenyl zirconium dichloride complexes with and without a dimethylsilyl bridge : syntheses, crystal structures and properties in propene polymerization catalysis</dcterms:title>
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    <dc:contributor>Weyand, Oliver</dc:contributor>
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    <dc:contributor>Dorer, Birgit</dc:contributor>
    <dc:creator>Dorer, Birgit</dc:creator>
    <dcterms:issued>1996</dcterms:issued>
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