Highly trans-stereospecific isoprene polymerization by neodymium borohydrido catalysts

被引：126

作者：

Bonnet, F

Visseaux, M

Pereira, A

Barbier-Baudry, D

机构：

[1] Univ Sci & Tech Lille Flandres Artois, ENSCL, CNRS, UMR 8010,Lab Catalyse Lile, F-59652 Villeneuve Dascq, France

[2] Univ Bourgogne, CNRS, UMR 5188, LSEO, F-47870 Dijon, France

来源：

MACROMOLECULES | 2005年 / 38卷 / 08期

关键词：

D O I：

10.1021/ma047615r

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Highly stereospecific polymerization of isoprene was achieved using borohydridoneodymium complexes. In combination with stoichiometric amounts of dialkylmagnesium, Nd(BH4)(3)(THF)(3) (1) and Cp*'Nd(BH4)(2)(THF)(2) (2) (Cp*' = C(5)Me(4)nPr) afford very efficient catalysts. The activity reaches 37300 (g of polyisoprene/mol of Nd)/h. Half-lanthanidocene 2 gives rise to polyisoprene, 98.5% trans-regular, the highest content yet described for a homogeneous organometallic catalyst. NMR experiments argue for the formation of bimetallic Nd(mu-BH4)Mg active species.

引用

页码：3162 / 3169

页数：8

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