[（NHC）CrCl（μ-Cl）(THF)]2 and（NHC）2CrCl2（NHC=1,3-Diisopropyl-4,5-dimethylimidazole-2-ylidene）:Syntheses,Structures,and Polymerization Activities

被引：1
|
作者：
王娟娟 [1 ]
安冬丽 [1 ]
朱红平 [1 ]
机构：
[1] State Key Laboratory of Physical Chemistry of Solid Surfaces,National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters,College of Chemistry and Chemical Engineering,Xiamen University
来源：
结构化学 | 2010年 / 29卷 / 06期
基金：
中国国家自然科学基金;
关键词：
chromium(Ⅱ) compounds; N-heterocyclic carbene; crystal structure; polymerization activity;
D O I：
10.14102/j.cnki.0254-5861.2010.06.018
中图分类号：
O621.25 [];
学科分类号：
摘要：
The preparation of divalent chromium N-heterocyclic carbene(NHC,1,3-diisopropyl4,5-dimethylimidazole-2-ylidene) compounds is reported.The reaction of 1:1 molar ratio of NHC with CrCl2 led to an isolation of [(NHC)CrCl(μ-Cl)(THF)]2(1),while that of 2:1 ratio resulted in the formation of(NHC)2CrCl2(2).1 can be considered as an intermediate in the formation of 2 and further converted into 2 by the addition of another equiv.of NHC.The reaction of 2 with CpNa afforded an ion pair compound [(NHC)2CrCp]+[Cp]-(3),indicating a strong coordination ability of NHC supplanting one of the ionic Cr-Cp bonding.In combination of methylalumoxane(MAO) as cocatalyst 1 and 2 both are active for catalyzing ethylene polymerization.
引用
收藏
页码：933 / 939
页数：7
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