TIN-BRIDGED ANSA-METALLOCENES OF ZIRCONIUM - SYNTHESIS AND CATALYTIC PERFORMANCE IN OLEFIN POLYMERIZATION

Authors
HERRMANN WA MORAWIETZ MJA HERRMANN HF KUBER F
Citation
Wa. Herrmann et al., TIN-BRIDGED ANSA-METALLOCENES OF ZIRCONIUM - SYNTHESIS AND CATALYTIC PERFORMANCE IN OLEFIN POLYMERIZATION, Journal of organometallic chemistry, 509(1), 1996, pp. 115-117
Citations number
39
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Journal of organometallic chemistry → ACNP
ISSN journal
0022328X
Volume
509
Issue
1
Year of publication
1996
Pages
115 - 117
Database
ISI
SICI code
0022-328X(1996)509:1<115:TAOZ-S>2.0.ZU;2-A
Abstract
The first tin-bridged zirconocenes [(CH3)(2)Sn(C5H4)(2)]Zr[N(CH3)(2)]( 2) (3) and Sn((C5H4)(2)Zr[N(CH3)(2)](2)}(2) (4) have been obtained fro m tetrakis(dimethylamido)zirconium (1) and the CH-acidic ligands (CH3) (2)Sn(C5H5)(2) (2a) and Sn(C5H5)(4) (2b), respectivily. The ansa-zirco nocene 3 is formed in quantitative yield, 4 in 81% yield. The bi- and trimetallic complexes 3(ZrSn) and 4(Zr2Sn) polymerize ethylene more ef ficiently than the well-known silicon-bridged analogue of 3 (Si instea d of Sn).