Chromium(III) complexes with terdentate 2,6-bis(azolylmethyl)pyridine ligands: Synthesis, structures and ethylene polymerization behavior

被引：19

作者：

Hurtado, John ^{[1
]}

Carey, Desmond Mac-Leod ^{[1
]}

Munoz-Castro, Alvaro ^{[2
]}

Arratia-Perez, Ramiro ^{[2
]}

Quijada, Raul ^{[3
]}

Wu, Guang ^{[4
]}

Rojas, Rene ^{[1
,3
]}

Valderrama, Mauricio ^{[1
]}

机构：

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

[2] Univ Andres Bello, Dept Ciencias Quim, Fac Recursos Nat, Santiago, Chile

[3] Ctr Invest Interdisciplinaria Avanzada Ciencia Ma, Santiago, Chile

[4] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2009年 / 694卷 / 16期

关键词：

Chromium; Terdentate ligands; Theoretical studies; Ethylene polymerization; TRIAZACYCLOHEXANE COMPLEXES; COPPER(II) COMPLEXES; TRIDENTATE LIGANDS; METAL-COMPLEXES; CATALYSTS; IRON; OLIGOMERIZATION; ENERGY; APPROXIMATION;

D O I：

10.1016/j.jorganchem.2009.04.014

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reactions of 2,6-bis(bromomethyl) pyridine with 3,5-dimethylpyrazole and 1H-indazole yield the terdentate ligands 2,6-bis(3,5-dimethylpyrazol-1-ylmethyl)pyridine (5) and 2,6-bis(indazol-2-ylmethyl)pyridine (6). The molecular structure of the new compound 6 was determined by single-crystal X-ray diffraction. These ligands react with the CrCl3(THF)(3) complex in THF to form neutral complexes of general formula [CrCl3{2,6-bis(azolylmethyl)pyridine-N,N,N}] (7, 8) which are isolated in high yields as stable green solids and characterized by means of elemental analysis, magnetic moments, IR, and mass spectroscopy. 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 in the polymerization of ethylene. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2636 / 2641

页数：6

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