CH(phenol)-Bridged Bis(imino)pyridines as Compartmental Supports for Diiron Precatalysts for Ethylene Polymerization: Exploring Cooperative Effects on Performance

doi:10.1021/acs.organomet.8b00602

	CH(phenol)-Bridged Bis(imino)pyridines as Compartmental Supports for Diiron Precatalysts for Ethylene Polymerization: Exploring Cooperative Effects on Performance
	Chen, Q ; Zhang, WJ ; Solan, GA ; Zhang, RD ; Guo, LW ; Hao, X ; Sun, WH
刊名	ORGANOMETALLICS
	2018-11-12
卷号	37 期号:21 页码:4002-4014
ISSN号	0276-7333
DOI	10.1021/acs.organomet.8b00602
英文摘要	A family of six CH(phenol)-bridged bimetallic bis(imino)pyridine-iron(II) chlorides, CH(C6H4-4-OH){2'-(4-C6H2-2,6-(R-1)(2)N=CMe)-6'-(2 '',6 ''-(R-2)(2)-4-(R-3)C6H2N = CMe)C5H3N}(2)Fe2Cl4 [R-1 = R-2 = Me, R-3 = H, Fe1; R-1 = R-2 = Et, R-3 = H, Fe2; R-1 = Me, R-2 = Et, R-3 = H, Fe3; R-1 = Me, R-2 = i-Pr, R-3 = H, Fe4; R-1 = R-2 = R-3 = Me, Fe5; R-1 = R-2 = Et, R-3 = Me, Fe6], has been synthesized by the reaction of the corresponding compartmental ligand with 2 equiv of FeCl2 center dot 4H(2)O. The molecular structure of Fe6 reveals an intramolecular Fe center dot center dot center dot Fe separation of 10.152 angstrom, with pairs of Fe6 assembling through intermolecular OH center dot center dot center dot Cl hydrogen bonding interactions. On activation with MAO or MMAO, Fe1-Fe6 exhibited both good thermal stability and very high activity for ethylene polymerization with the least sterically bulky compound, Fe1, being the standout performer (up to 2.43 X 10(7) g.mol(-1) (Fe).h(-1) at 60 degrees C). Notably, Fe1/MAO showed almost double the activity of a structurally related mononuclear catalyst while the resultant polyethylene exhibited much higher molecular weight. In general, the polymeric materials are highly linear and have a tendency to display bimodal distributions that is influenced by the amount of cocatalyst employed. End-group analysis of the polymers generated using MMAO activation reveals chain ends composed of vinyl and saturated groups (propyl and isobutyl), while with MAO, a preference for propyl end groups is observed.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000450374500040
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/41960]
专题	化学研究所_工程塑料实验室
作者单位	1.Zhang, WJ 2.Solan, GA 3.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China. 4.Zhang, WJ (reprint author), Beijing Inst Fash Technol, Sch Mat Sci & Engn, Beijing 100029, Peoples R China. 5.Solan, GA (reprint author), Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England.
推荐引用方式 GB/T 7714	Chen, Q,Zhang, WJ,Solan, GA,et al. CH(phenol)-Bridged Bis(imino)pyridines as Compartmental Supports for Diiron Precatalysts for Ethylene Polymerization: Exploring Cooperative Effects on Performance[J]. ORGANOMETALLICS,2018,37(21):4002-4014.
APA	Chen, Q.,Zhang, WJ.,Solan, GA.,Zhang, RD.,Guo, LW.,...&Sun, WH.(2018).CH(phenol)-Bridged Bis(imino)pyridines as Compartmental Supports for Diiron Precatalysts for Ethylene Polymerization: Exploring Cooperative Effects on Performance.ORGANOMETALLICS,37(21),4002-4014.
MLA	Chen, Q,et al."CH(phenol)-Bridged Bis(imino)pyridines as Compartmental Supports for Diiron Precatalysts for Ethylene Polymerization: Exploring Cooperative Effects on Performance".ORGANOMETALLICS 37.21(2018):4002-4014.