Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium

被引：18

作者：

Bott, RKJ ^{[1
]}

Schormann, M ^{[1
]}

Hughes, DL ^{[1
]}

Lancaster, SJ ^{[1
]}

Bochmann, M ^{[1
]}

机构：

[1] Univ E Anglia, Sch Chem Sci & Pharm, Wolfson Mat & Catalysis Ctr, Norwich NR4 7TJ, Norfolk, England

来源：

POLYHEDRON | 2006年 / 25卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

titanium; zirconium; magnesium; chelate ligands; ferrocene; polymerisation catalysis;

D O I：

10.1016/j.poly.2005.07.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)(2)Mg(THF)(2) (2). The reactions of the Li(FcPI) with CpTiCl3 gave CpTiCl2(FcPi) center dot CH2Cl2 (4), whereas with CpZrCl3 center dot DME a mixture of three products is formed: CpZrCl(FcPI)(2) (5), CpZrCl2(FcPi) (6), and (FcPI)(2)ZrCl2 center dot CH2Cl2 (3 center dot CH2O2). The crystal structures of compounds 2-6 are reported. Typically, the N-O chelates are oriented such that 0 donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FCPI)(2)ZrCl2 is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12-16. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：387 / 396

页数：10

共 33 条

[1] Sterically hindered iminophosphorane complexes of vanadium, iron, cobalt and nickel:: a synthetic, structural and catalytic study [J].