ICCAS OpenIR
Syntheses, Characterization, and Ethylene (Co-)Polymerization Screening of Amidate Half-Titanocene Dichlorides
Liu, Shaofeng1,2; Sun, Wen-Hua1,2,3; Zeng, Yanning1,2; Wang, Deligeer1,2,4; Zhang, Wenjuan1,2; Li, Yan1,2
2010-06-14
Source PublicationORGANOMETALLICS
ISSN0276-7333
Volume29Issue:11Pages:2459-2464
Abstract

A series of amidate half-titanocene dichlorides, Cp/TiLCl(2) [Cp' = Cp (as eta(5)-C(5)H(5)) or Cp* (as eta(5)-C(5)Me(5)), L = N-(2-methylquinolin-8-yl)-p-R-benzamides; C1: Cp' = Cp, R = OMe; C2: Cp' = Cp, R = Me; C3: Cp' = Cp, R = H; C4: Cp' = Cp, R = F; C5: Cp' = Cp, R = Cl; C6: Cp' = Cp*, R = OMe; C7: Cp' = Cp*, R = Me], have been synthesized by the stoichiometric reaction of Cp'TiCl(3) with the corresponding potassium amidates. All complexes are fully characterized by elemental and NMR analyses. The molecular structures of complexes C2 and C4 are confirmed by single-crystal X-ray diffraction, and the amidate moieties coordinate the titanium center by imino and alkoxide groups. The systems C1-C7/MAO show much higher activities toward ethylene polymerization than CpTiCl(3)/MAO or Cp*TiCl(3)/MAO systems. The procatalysts (C6 and C7) bearing a Cp* ligand exhibit higher activities than their analogues (C1-C5) containing a Cp ligand, while the amidate ligands containing electron-donating groups positively affect the catalytic behavior. Both increasing the ratio of MAO to titanium and reducing reaction temperature enhance the productivities; however, the molecular weights of the resultant polymers decrease with higher activities. Moreover, the C6/MAO system performs with high activity in the copolymerization of ethylene and 1-hexene or 1-octene.

DOI10.1021/om1000748
Indexed BySCI ; IC
Language英语
WOS IDWOS:000278427400013
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69832
Collection中国科学院化学研究所
Corresponding AuthorSun, Wen-Hua
Affiliation1.Chinese Acad Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Nat Lab Mol Sci, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
4.Inner Mongolia Normal Univ, Dept Chem, Hohhot 010022, Peoples R China
Recommended Citation
GB/T 7714
Liu, Shaofeng,Sun, Wen-Hua,Zeng, Yanning,et al. Syntheses, Characterization, and Ethylene (Co-)Polymerization Screening of Amidate Half-Titanocene Dichlorides[J]. ORGANOMETALLICS,2010,29(11):2459-2464.
APA Liu, Shaofeng,Sun, Wen-Hua,Zeng, Yanning,Wang, Deligeer,Zhang, Wenjuan,&Li, Yan.(2010).Syntheses, Characterization, and Ethylene (Co-)Polymerization Screening of Amidate Half-Titanocene Dichlorides.ORGANOMETALLICS,29(11),2459-2464.
MLA Liu, Shaofeng,et al."Syntheses, Characterization, and Ethylene (Co-)Polymerization Screening of Amidate Half-Titanocene Dichlorides".ORGANOMETALLICS 29.11(2010):2459-2464.
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