A zwitterionic nickel-olefin initiator for the preparation of high molecular weight polyethylene

被引：16

作者：

Chen, Yaofeng

Boardman, Brycelyn M.

Wu, Guang

Bazan, Guillermo C. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem, Ctr Polymer & Organ Solids, Santa Barbara, CA 93106 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2007年 / 692卷 / 21期

关键词：

homogeneous catalysis; polyethylene; nickel; olefin complexes;

D O I：

10.1016/j.jorganchem.2007.05.016

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The reaction of the sodium 3-(2,6-diisopropylphenylimino)-but-1-en-2-olato with Ni(PMe3)2(eta(1)-CH2C6H5)Cl provides 3-(2,6-diisopropylphenylimino)-but-1-en-2-olato(eta(1)benzyl)(trimethylphosphine) nickel (1), which was structurally characterized. The addition of 2 equiv. of B(C6F5)(3) to 1 results in the formation of 2-tris(pentafluorophenyl)borate-3-(2,6-diisopropylphenylimino)-but-1-ene(eta(3)-benzyl)nickel (2), in which the borane coordinates to the O site of the ligand and forces binding of the olefin unit to the nickel center. The solid-state structure of 2 shows a zwitterionic structure with substantial positive charge at the nickel center. Compound 2 can be used to initiate the homopolymerization of ethylene to yield high molecular weight polyethylene. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：4745 / 4749

页数：5

共 28 条

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