Synthesis, characterization and L-lactide polymerization behavior of rare-earth metal bis(silylamide) complexes supported by arylamido ligand

被引：5
|
作者：
Deng, Meng [1 ]
Chen, Fei [1 ]
Chen, Jue [1 ]
Luo, Yunjie [1 ]
机构：
[1] Zhejiang Univ, Ningbo Inst Technol, Organometall Chem Lab, Ningbo 315100, Zhejiang, Peoples R China
来源：
JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2016年 / 808卷
基金：
中国国家自然科学基金;
关键词：
Rare-earth; Amide complex; L-lactide; Polymerization; RING-OPENING POLYMERIZATION; BRIDGED BIS(PHENOLATO) LIGAND; RAC-LACTIDE; CYCLIC ESTERS; STRUCTURAL-CHARACTERIZATION; LIVING POLYMERIZATION; CRYSTAL-STRUCTURE; ANCILLARY LIGAND; BEARING; CATALYSIS;
D O I：
10.1016/j.jorganchem.2016.02.026
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Salt metathesis of LnCl(3), [2,6-(Pr2C6H3N)-Pr-i(SiMe3)]Li and LiN(SiHMe2)(2) in 1:1:2 molar ratio in THF produced the mono-arylamido-ligated rare-earth metal bis(silylamide) complexes [2,6-(Pr2C6H3N)-Pr-i(SiMe3)]Ln [N(SiHMe2)(2)](2)(THF) (Ln = Y (1), Lu (2), La (3)) in good isolated yields. All these complexes were characterized by elemental analysis, NMR spectroscopy and FT-IR spectroscopy. 1 was further structurally authenticated by single crystal X-ray diffraction. These complexes alone could serve as highly active initiators for L-lactide polymerization in toluene at 50 degrees C. Employing 1 as the initiator, L-lactide polymerization proceeded in a controllable fashion via the coordination-insertion mechanism verified by end group analysis of the oligomer. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：117 / 121
页数：5
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