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 | |
刊名 | ORGANOMETALLICS |
2010-06-14 | |
卷号 | 29期号:11页码:2459-2464 |
ISSN号 | 0276-7333 |
DOI | 10.1021/om1000748 |
英文摘要 | 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. |
语种 | 英语 |
出版者 | AMER CHEMICAL SOC |
WOS记录号 | WOS:000278427400013 |
内容类型 | 期刊论文 |
源URL | [http://ir.iccas.ac.cn/handle/121111/69831] |
专题 | 中国科学院化学研究所 |
通讯作者 | Sun, Wen-Hua |
作者单位 | 1.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 |
推荐引用方式 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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