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The C<INF>s</INF><INF></INF>-Symmetric Aminoboranediyl-Bridged Zirconocene Dichloride [(η-9-C<INF>13</INF>H<INF>8</INF>)- BN(<SUP>i</SUP><SUP></SUP>Pr)<INF>2</INF>(η-C<INF>5</INF>H<INF>4</INF>)]ZrCl<INF>2</INF>:  Its Synthesis, Structure, and Behavior as an Olefin Polymerization Catalyst

Authors :
Ashe, A. J., III
Fang, X.
Hokky, A.
Kampf, J. W.
Source :
Organometallics; April 2004, Vol. 23 Issue: 9 p2197-2200, 4p
Publication Year :
2004

Abstract

The sequential reaction of 9-fluorenyllithium and CpNa with (&lt;SUP&gt;i&lt;/SUP&gt;&lt;SUP&gt;&lt;/SUP&gt;Pr)&lt;INF&gt;2&lt;/INF&gt;NBCl&lt;INF&gt;2&lt;/INF&gt; followed by the sequential treatment with LDA and ZrCl&lt;INF&gt;4&lt;/INF&gt; afforded [(η&lt;SUP&gt;5&lt;/SUP&gt;-C&lt;INF&gt;13&lt;/INF&gt;H&lt;INF&gt;8&lt;/INF&gt;)BN(&lt;SUP&gt;i&lt;/SUP&gt;&lt;SUP&gt;&lt;/SUP&gt;Pr)&lt;INF&gt;2&lt;/INF&gt;(η&lt;SUP&gt;5&lt;/SUP&gt;-C&lt;INF&gt;5&lt;/INF&gt;H&lt;INF&gt;4&lt;/INF&gt;)ZrCl&lt;INF&gt;2&lt;/INF&gt; (&lt;BO&gt;2e&lt;/BO&gt;). The structure of &lt;BO&gt;2e&lt;/BO&gt; was determined by X-ray diffraction, which shows that the molecule has C&lt;INF&gt;s&lt;/INF&gt;&lt;INF&gt;&lt;/INF&gt; symmetry. On activation by excess methylaluminoxane (MAO) &lt;BO&gt;2e&lt;/BO&gt; was converted to an active catalyst for polymerization of ethylene and propylene. The polypropylene is syndiotactic (81% rr triads).

Details

Language :
English
ISSN :
02767333 and 15206041
Volume :
23
Issue :
9
Database :
Supplemental Index
Journal :
Organometallics
Publication Type :
Periodical
Accession number :
ejs5889948

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