Homogeneous ethylene-polymerization catalysts based on alkyl cations of the rare-earth metals: Are dicationic mono(alkyl) complexes the active species?

被引：134

作者：

Arndt, S ^{[1
]}

Spaniol, TP ^{[1
]}

Okuda, J ^{[1
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Anorgan Chem & Analyt Chem, D-55099 Mainz, Germany

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2003年 / 42卷 / 41期

关键词：

alkyl ligands; aluminum; cations; polymerization; rare earth elements;

D O I：

10.1002/anie.200352532

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Easily accessible, the tris(alkyl) complexes of rare-earth elements [Ln(CH2SiMe3)3(thf)2] are activated by [NMe2HPh] [B(C6F5)4] in the presence of AliBu3 to catalyze homogeneous ethylene polymerization. Model reactions show that the bis(alkyl) yttrium monocation is converted into the mono(alkyl) dication (see picture), which appears to be the active species in ethylene polymerization.

引用

页码：5075 / 5079

页数：5

共 21 条

[1] The first structurally characterized cationic lanthanide-alkyl complexes
Arndt, S
Spaniol, TP
Okuda, J
[J]. CHEMICAL COMMUNICATIONS, 2002, (08) : 896 - 897
[2] Yttrium alkyl complexes with a sterically demanding benzamidinate ligand: synthesis, structure and catalytic ethene polymerisation
Bambirra, S
van Leusen, D
Meetsma, A
Hessen, B
Teuben, JH
[J]. CHEMICAL COMMUNICATIONS, 2003, (04) : 522 - 523
[3] Neutral and cationic yttrium alkyl complexes with linked 1,4,7-triazacyclononane-amide monoanionic ancillary ligands: synthesis and catalytic ethene polymerisation
Bambirra, S
van Leusen, D
Meetsma, A
Hessen, B
Teuben, JH
[J]. CHEMICAL COMMUNICATIONS, 2001, (07) : 637 - 638
[4] Double activation of constrained geometry and ansa-metallocene group 4 metal Dialkyls:: Synthesis, structure, and olefin polymerization study of mono-and dicationic aluminate complexes
Chen, EYX
Kruper, WJ
Roof, G
Wilson, DR
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (04) : 745 - 746
[5] Synthesis and characterization of half- and full-sandwich lanthanacarboranes of the C2B9-carborane ligand.: X-ray crystal structures of [LnCl2(THF)5][nido-C2B9H12] (Ln = Y, Yb)
Chiu, KY
Zhang, ZY
Mak, TCW
Xie, ZW
[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2000, 614 : 107 - 112
[6] SYNTHESIS AND STRUCTURE OF THE CATIONIC TERT-BUTOXIDE COMPLEXES Y3(OR)7CL(THF)3+, Y2(OR)4CL(THF)4+, AND Y(OR)CL(THF)5+ - REPRESENTATIVES OF A NEW CLASS OF YTTRIUM ALKOXIDES
EVANS, WJ
OLOFSON, JM
ZILLER, JW
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (06) : 2308 - 2314
[7] INCLUSION OF AL(2)ME(6) IN THE CRYSTALLINE LATTICE OF THE ORGANOMETALLIC COMPLEXES LNAL(3)ME(12)
EVANS, WJ
ANWANDER, R
ZILLER, JW
[J]. ORGANOMETALLICS, 1995, 14 (03) : 1107 - 1109
[8] Ternary metallocene catalyst systems based on metallocene dichlorides and AlBu3i/[PhNMe2H][B(C6F5)4] NMR investigations of the influence of Al/Zr ratios on alkylation and on formation of the precursor of the active metallocene species
Götz, C
Rau, A
Luft, G
[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2002, 184 (1-2) : 95 - 110
[9] Synthesis, structure, and reactivity of the phosphinimide complexes (t-Bu3PN)nMa4-n (M = Ti, Zr)
Guérin, F
Stewart, JC
Beddie, C
Stephan, DW
[J]. ORGANOMETALLICS, 2000, 19 (16) : 2994 - 3000
[10] Highly electron deficient Group 3 organometallic complexes based on the 1,4,7-trimethyl-1,4,7-triazacyclononane ligand system
Hajela, S
Schaefer, WP
Bercaw, JE
[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 1997, 532 (1-2) : 45 - 53

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