COMPARISON OF THE CATALYTIC ACTIVITY OF ZIEGLER-TYPE CATALYSTS BASED ON CP(2)ZRCL(2) AND (CP(2)ZRCL)(2)O

Authors
FUSHMAN EA LALAYAN SS MINACHEVA MK MIKHAILOVA OA MARGOLIN AD
Citation
Ea. Fushman et al., COMPARISON OF THE CATALYTIC ACTIVITY OF ZIEGLER-TYPE CATALYSTS BASED ON CP(2)ZRCL(2) AND (CP(2)ZRCL)(2)O, Russian chemical bulletin, 42(12), 1993, pp. 2018-2021
Citations number
16
Categorie Soggetti
Chemistry
Journal title
Russian chemical bulletin → ACNP
ISSN journal
10665285
Volume
42
Issue
12
Year of publication
1993
Pages
2018 - 2021
Database
ISI
SICI code
1066-5285(1993)42:12<2018:COTCAO>2.0.ZU;2-A
Abstract
The rates of ethylene polymerization catalyzed by Cp(2)ZrCl(2)-polymet hylalumoxane and (Cp(2)ZrCl)(2)O-polymethylalumoxane are equal. Accord ing to NMR and ESR spectral data, the same precatalyst, presumably Cp( 2)ZrMe(2), is formed in both systems by the action of AlMe(3). This ac counts for the equal catalytic activity of the systems based on Cp(2)Z rCl(2) and (Cp(2)ZrCl)(2)O. A scheme of reactions resulting in cleavag e of the Zr-O-Zr bridge is proposed and confirmed by spectroscopic dat a.