Preparation, Characterization, and Catalytic Studies of Magnesium Complexes Supported by NNO-Tridentate Schiff-Base Ligands

被引：148

作者：

Hung, Wen-Chou ^{[1
]}

Lin, Chu-Chieh ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Chem, Taichung 402, Taiwan

来源：

INORGANIC CHEMISTRY | 2009年 / 48卷 / 02期

关键词：

RING-OPENING POLYMERIZATION; CYCLIC ESTERS; ALUMINUM COMPLEXES; METAL-COMPLEXES; ZINC ALKOXIDES; L-LACTIDE; INITIATORS; ETHYLENE; COPOLYMERIZATION; SUBSTITUENTS;

D O I：

10.1021/ic801397t

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of magnesium benzyl alkoxides, [LMg(mu-OBn)](2) (1-8), supported by NNO-tridentate Schiff-base ligands are prepared by the reactions of Mg(OBn)(2) with one molar equivalent of related Schiff-base ligands ((LH)-H-1-(LH)-H-8) in toluene. The molecular structures of compounds 2, 3, 7, and 8 are characterized by X-ray structure determination. All of these compounds are crystallized as penta-coordinated dimers, and the central magnesium atoms are bridged by the oxygen atoms of benzyl alkoxides. The catalytic activities of complexes 1-8 toward the ring-opening polymerization of L-lactide are investigated. Experimental results indicate that the reactivity of [LMg(mu-OBn)](2) (1-8) is dramatically affected by the electronic effect of the substituents on the Schiff-base ligands, and 4 has the highest activity among them.

引用

页码：728 / 734

页数：7

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