Si2Me4-bridged zirconocene dichlorides: crystal and molecular structure ofmeso-Si2Me4(3-SiMe3-C9H5)(2)ZrCl2

Authors
Perez-Camacho, O Knjazhanski, SY Cadenas, G Rosales-Hoz, MJ Leyva, MA
Citation
O. Perez-camacho et al., Si2Me4-bridged zirconocene dichlorides: crystal and molecular structure ofmeso-Si2Me4(3-SiMe3-C9H5)(2)ZrCl2, J ORGMET CH, 585(1), 1999, pp. 18-25
Citations number
32
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF ORGANOMETALLIC CHEMISTRY
ISSN journal
0022328X → ACNP
Volume
585
Issue
1
Year of publication
1999
Pages
18 - 25
Database
ISI
SICI code
0022-328X(19990801)585:1<18:SZDCAM>2.0.ZU;2-S
Abstract
A series of complexes Si2Me4L2ZrCl2 (L = Ind (Ib), 2-Me-Ind (2b), 3-SiMe3-I nd (3b) and Ind-H-4 (4)) was prepared. The syntheses of Ib, 3b and 4 gave p redominantly the meso-isomers, whereas a 1:1 meso:rac mixture was obtained for 2b. X-ray analysis of meso-3b revealed large steric hindrance on the me tal center (Cp degrees-Zr-Cp degrees is 134.6 degrees). The 1:1 mixture of meso-2b and rac-2b (activated with MAO) produced a 2.2:1 mixture of elastic atactic and isotactic polypropylene with low activity. (C) 1999 Elsevier S cience S.A. All rights reserved.