Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide

	Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide
	Xie, Hongyan ; Mou, Zehuai ; Liu, Bo ; Li,Ping ; Rong,Weifeng ; Li,Shihui ; Cui,Dongmei
刊名	organometallics
	2014
卷号	33 期号:3 页码:722-730
关键词	RING-OPENING POLYMERIZATION BRIDGED BIS(PHENOLATO) LIGAND SINGLE-SITE CATALYSTS ZINC-COMPLEXES EPSILON-CAPROLACTONE STEREOSELECTIVE POLYMERIZATION ALTERNATING COPOLYMERIZATION COORDINATION CHEMISTRY IMMORTAL ROP BEARING
通讯作者	cui,dm
英文摘要	alkane elimination reactions of phosphinimino-amine ligands hl1-8 ((2,6-me-2-c6h3nh)c(ph)=chpph2(nar) (ar = c6h5 (hl1); 2,6-me-2-c6h3 (hl2); 2,6-et-2-c6h3 (hl3); 2,6-pr-i(2)-c6h3 (hl4); 2-ome-c6h4 (hl5); 2-cl-c6h4 (hl6); 3-cf3-c6h4 (hl7); 4-meo-c6h4 (hl8)) with (mgbu2)-bu-n, respectively, afforded a series of phosphinimino-amine-based complexes (l1-8mgbu)-bu-n(thf) (1-8) by releasing butane. complexes 1-8 are phosphinimino-amine-ligated thf-solvated mono(alkyl)s, among which 1-4 adopt twisted tetrahedral geometries, whereas 5 contains a trigonal bipyramido geometry core. complexes 1-8 all display high activity for the ring-opening polymerization of rac-lactide. the molecular weights of the resulting pla are close to the theoretic values, and the molecular weight distributions are narrow. moreover, these complexes show medium to high heteroselectivity, which, interestingly, increases with the decrease of the ligand steric hindrance; thus, complex 1, bearing a less bulky ligand, exhibits a heteroselectivity of p-r = 0.98, the highest value of a magnesium-based initiator achieved to date. the kinetics study showed that the polymerization rate is first-order dependent on both monomer and initiator concentrations, and the overall rate equation is -d[la]/dt = 3.78 m-1 s(-1) [la][mg].
收录类别	SCI
语种	英语
WOS记录号	WOS:000331341900018
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/57206]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Xie, Hongyan,Mou, Zehuai,Liu, Bo,et al. Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide[J]. organometallics,2014,33(3):722-730.
APA	Xie, Hongyan.,Mou, Zehuai.,Liu, Bo.,Li,Ping.,Rong,Weifeng.,...&Cui,Dongmei.(2014).Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide.organometallics,33(3),722-730.
MLA	Xie, Hongyan,et al."Phosphinimino-amino Magnesium Complexes: Synthesis and Catalysis of Heteroselective ROP of rac-Lactide".organometallics 33.3(2014):722-730.