L2Zn and LZnX complexes bearing half-salphen ligands and their catalysis of ring-opening polymerization of ε -caprolactone

被引：4

作者：

Zhu, Di ^{[1
]}

Li, Yiyan ^{[1
]}

Chen, Jie ^{[1
]}

Song, Xiaojiao ^{[1
]}

机构：

[1] China Univ Petr, Coll Sci, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2020年 / 920卷

基金：

中国国家自然科学基金;

关键词：

Bisligated zinc complex; Ring-opening polymerization; epsilon-Caprolactone; Binuclear zinc complex; ZINC-COMPLEXES; RAC-LACTIDE; CRYSTAL-STRUCTURE; COPOLYMERIZATION; MAGNESIUM; ALUMINUM;

D O I：

10.1016/j.jorganchem.2020.121317

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Zinc complexes L2Zn and LZnX were prepared by template synthesis from ZnX2, N1,N1-dimethylbenzene-1,2-diamine and substituted salicylaldehyde (SA). A systematic exploration of this synthetic route revealed the subtle role of choice of Zn source and SA substitution pattern on the reaction stoichiometry and enabled synthesis of pure Zn complexes. Use of poorly coordinating counterions (such as CF3SO3-) and apolar substituents on the SA component favours formation of pentacoordinate L2Zn, while more coordinating counterions tend to produce LZnX, (LZnX)(2) or even binuclear LZn(O2CR)Zn(O2CR)(2) not reported before. The complexes (LZnX)(2) and LZn(O2CR)center dot Zn(O2CR)(2) (L = L-2 or L-4) could be activated with BnOH/LiMe for ring-opening polymerization of epsilon-caprolactone; bis(ligand) complexes L2Zn show low or vanishing activity when activated either by BnOH or BnOH/LiMe. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：9

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