文献类型：期刊文献

英文题名：Magnesium, zinc, and calcium complexes based on tridentate nitrogen ligands: Syntheses, structures, and catalytic activities to the ring opening polymerization of rac-lactide

作者：Xu, Xin[1,2,3];Chen, Yaofeng[1];Zou, Gang[2,3];Ma, Zhi[4];Li, Guangyu[4]

机构：[1]Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, Shanghai 200032, Peoples R China;[2]E China Univ Sci & Technol, Adv Mat Lab, Shanghai 200237, Peoples R China;[3]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[4]Chinese Acad Sci, Shanghai Inst Organ Chem, Analyt Lab, Shanghai 200032, Peoples R China

年份：2010

卷号：695

期号：8

起止页码：1155

外文期刊名：JOURNAL OF ORGANOMETALLIC CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000275883500008)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 20672134, 20872164 and 20821002), Chinese Academy of Sciences and Shanghai Municipal Committee of Science and Technology (Grant No. 07JC14063).

语种：英文

外文关键词：Lactide; Ring-opening polymerization; Magnesium; Zinc; Calcium

摘要：A series of magnesium, zinc, and calcium monoalkyl or monoamide complexes containing tridentate nitrogen ligands, CH3C(2,6-(Pr-i)(2)C6H3N)CHC(CH3) (NCH2CH2-D) (D = NMe2, N((CH2CH2)(2)CH2)), have been synthesized, and six of which were characterized by single-crystal X-ray diffraction. The X-ray diffraction results show that the metal complexes are all solvent-free monomers and the pendant arm D bonds to the metal ion. These metal complexes are highly active for the ring-opening polymerization of rac-lactide and give preference for heterotactic polylactide. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.