COMPLEXATION OF CP2MCL2 IN A CHLOROALUMINATE MOLTEN-SALT - RELEVANCE TO HOMOGENEOUS ZIEGLER-NATTA CATALYSIS

被引：127

作者：

CARLIN, RT ^{[1
]}

WILKES, JS ^{[1
]}

机构：

[1] USAF ACAD,FRANK J SEILER RES LAB,COLORADO SPRINGS,CO 80840

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1990年 / 63卷 / 02期

关键词：

D O I：

10.1016/0304-5102(90)85135-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ethylene polymerization via Ziegler-Natta catalysis occurs in the ambient-temperature molten salt AlCl3.MEIC (MEIC = 1-ethyl-3-methylimidazolium chloride) employing Cp2TiCl2 as the catalyst and AlCl3-xR(x) (R = Me, Et) as a cocatalyst. Catalysis occurs only in melts with AlCl:MEIC molar ratios > 1. Cp2ZrCl2 and Cp2HfCl2 with AlCl3-xR(x) cocatalysts are not catalytically active in acidic melts. H-1 NMR studies indicate formation of a strong 1:1 complex between Cp2TiCl2 and AlCl3, while Zr and Hf form much weaker 1:1 complexes due to strong Zr-Cl and Hf-Cl bonding. This stronger M-Cl bonding for Zr and Hf is proposed to preclude the initiation reaction for ethylene polymerization in the molten salt.

引用

页码：125 / 129

页数：5

共 19 条

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