New bis(azolylcarbonyl)pyridine chromium(III) complexes as initiators for ethylene polymerization

被引：12

作者：

Hurtado, John ^{[1
]}

Ugarte, Javiera ^{[1
]}

Rojas, Rene ^{[1
]}

Valderrama, Mauricio ^{[1
]}

Mac-Leod Carey, Desmond ^{[2
]}

Munoz-Castro, Alvaro ^{[2
]}

Arratia-Perez, Ramiro ^{[2
]}

Froehlich, Roland ^{[3
]}

机构：

[1] Pontificia Univ Catolica Chile, Fac Quim, Dept Quim Inorgan, Santiago 6094411, Chile

[2] Univ Andres Bello, Fac Quim, Relativist Mol Phys ReMoPh Grp, Santiago, Chile

[3] Univ Munster, Inst Organ Chem, D-48149 Munster, Germany

来源：

INORGANICA CHIMICA ACTA | 2011年 / 378卷 / 01期

关键词：

Chromium; Tridentate ligands; Theoretical studies; Ethylene polymerization; X-RAY STRUCTURES; COPPER(II) COMPLEXES; TRIDENTATE LIGANDS; METAL-COMPLEXES; CATALYSTS; OLIGOMERIZATION; IRON; ENERGY; APPROXIMATION; BEHAVIOR;

D O I：

10.1016/j.ica.2011.08.065

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of 2,6-pyridinedicarbonyl dichloride with 3,5-dimethylpyrazole and 1H-indazole, respectively, yield the tridentate ligands 2,6-bis(3,5-dimethylpyrazol-1-ylcarbonyl)pyridine (1) and 2,6-bis(indazol-1-ylcarbonyl)pyridine (2). The molecular structure of the new compound (2) was determined by single-crystal X-ray diffraction. These ligands react with CrCl3(THF)(3) in THF to form neutral complexes of general formula [CrCl3{2,6-bis(azolylcarbonyl)pyridine-N,N,N}] (3, 4) which were isolated in high yield as air stable green solids and characterized by elemental analysis, magnetic moment, IR, and mass spectroscopies. Theoretical calculations predict that the thermodynamically preferred structure of the complexes is the fac configuration. After reaction with methylaluminoxane (MAO) the chromium(III) complexes are active for the polymerization of ethylene. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：218 / 223

页数：6

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