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| A series of new zirconium complexes bearing bis(phenoxyketimine) ligands: Synthesis, characterization and ethylene polymerization | |
| Chen, ST; Zhang, XF; Ma, HW; Lu, YY; Zhang, ZC; Li, HY; Lu, ZX; Cui, NN; Hu, YL | |
| 2005-09-15 | |
| Source Publication | JOURNAL OF ORGANOMETALLIC CHEMISTRY
 |
| ISSN | 0022-328X |
| Volume | 690Issue:18Pages:4184-4191 |
| Abstract | A series of new zirconium complexes bearing bis(phenoxyketimine) ligands, bis((3,5-di-tert-butyl-C6H2-2-O)R1C=N (2-R2C6H4))ZrCl2 {R-1 = Me, R-2 = H (2a); R-1 = Et, R-2 = H (2b); R-1 = Ph, R-2 = H (2c); R-1 = 2-Me-Ph, R-2 = H (2d); R-1 = 2-F-Ph, R-2 = H (2e); R-1 = 2-Cl-Ph, R-2 = H (2f); R-1 = 2-Br-Ph, R-2 = H (2g); R-1 = Ph, R-2 = Me (2h); R-1 = Ph, R-2 = F (2i)}, have been prepared, characterized and tested as catalyst precursors for ethylene polymerization. Crystal structure analysis reveals that complex 2c has a six coordinate center in a distorted octahedral geometry with trans-O, cis-N, cis-Cl arrangement which possesses approximate C-2 symmetry. When activated with methylaluminoxane (MAO), complexes 2a-2i exhibited high ethylene polymerization activities of 10(6)-10(8) g PE (mol M h)(-1). Compared with the bis(phenoxyimine) zirconium analogues bis((3,5-di-tert-butyl-C6H2-2-O)CH=NC6H5)ZrCl2 (3), the introduction of substituent on the carbon atom of the imine double bond enhanced the catalytic activity and molecular weight of prepared polyethylene. Especially, when the H atom at the carbon atom of the imine double bond was replaced by 2-fluoro-phenyl with strong electronic-withdrawing property, complex 2e displayed the highest catalytic activity, and the polyethylene obtained possessed the highest molecular weight and melt point. (c) 2005 Elsevier B.V. All rights reserved. |
| Keyword | Phenoxyketimine Zirconium Ethylene Polymerization |
| DOI | 10.1016/j.jorganchem.2005.06.029 |
| Indexed By | SCI ; IC ; CCR |
| Language | 英语 |
| WOS ID | WOS:000231995700011 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.iccas.ac.cn/handle/121111/57418 |
| Collection | 中国科学院化学研究所 |
| Corresponding Author | Lu, YY |
| Affiliation | 1.Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, Key Lab Engn Plast, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| Recommended Citation GB/T 7714 | Chen, ST,Zhang, XF,Ma, HW,et al. A series of new zirconium complexes bearing bis(phenoxyketimine) ligands: Synthesis, characterization and ethylene polymerization[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY,2005,690(18):4184-4191. |
| APA | Chen, ST.,Zhang, XF.,Ma, HW.,Lu, YY.,Zhang, ZC.,...&Hu, YL.(2005).A series of new zirconium complexes bearing bis(phenoxyketimine) ligands: Synthesis, characterization and ethylene polymerization.JOURNAL OF ORGANOMETALLIC CHEMISTRY,690(18),4184-4191. |
| MLA | Chen, ST,et al."A series of new zirconium complexes bearing bis(phenoxyketimine) ligands: Synthesis, characterization and ethylene polymerization".JOURNAL OF ORGANOMETALLIC CHEMISTRY 690.18(2005):4184-4191. |
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