Cationic mono(pentamethylcyclopentadienyl)(2-methallyl) complexes of hafnium

被引：21

作者：

Hessen, B

vanderHeijden, H

机构：

[1] Shell International Chemicals B.V., Shell Research and Technology Centre, 1030 BN Amsterdam

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1997年 / 534卷 / 1-2期

关键词：

allyl; catalysis; cyclopentadienyl;

D O I：

10.1016/S0022-328X(96)06924-0

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two new cationic mono(pentamethylcyclopentadienyl) organohafnium complexes with eta(3)-2-methallyl ligands, [(C5Me5)Hf(eta(3)-2-C4H7)Me][MeB(C6F5)(3)] (5) and [(C5Me5)Hf(eta(3)-2-C4H7)(2)][B(C6F5)(4)] (6), have been prepared. The former readily polymerises ethene, but is not active towards propene. The latter, with the weakly coordinating [B(C6F5)(4)] anion, oligomerises propene to atactic oligomers. In contrast with metallocene systems, the oligomerisation of a-olefins like propene is apparently readily initiated on the 2-methallyl groups in this complex.

引用

页码：237 / 239

页数：3

共 15 条

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