Synthesis and characterization of novel chromium complexes based on beta-enaminoketonato ligands and their application to ethylene polymerization
文献类型：期刊论文
| 作者 | Liu, Jing-Yu; Tao, Ping; Li, Yue-Sheng |
| 刊名 | JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
 |
| 出版日期 | 2014-11-15 |
| 卷号 | 394页码:162-169 |
| 关键词 | Ziegler-natta Polymerization Catalysts Polyolefin |
| ISSN号 | 1381-1169 |
| DOI | 10.1016/j.molcata.2014.07.006 |
| 英文摘要 | A series of novel non-Cp-based chromium(III) complexes bearing tridentate beta-enaminoketonato chelating ligands of type, [(RNC)-N-2(CF3)C(H)(CRO)-O-1]CrCl2(thf) (2a: R-1 = Bu-t, R-2 = -C6H4OMe(o); 2b: R-1 = Bu-t, R-2 = -C9H6N; 2c: R-1 = Bu-t, R-2 = -C6H4SMe(o); 2d: R-1 =Ph, R-2 = -C9H6N; 2e: R-1 = Ph, R-2 = -C6H4SMe(o)) have been prepared in high yields (e.g. 63-79%) from CrCl3(thf)(3) by treating with 1.0 equiv. of the deprotonated ligands in tetrahydrofuran. These complexes were identified by IR, and mass spectra as well as elemental analysis. Structures for 2b, 2c and 2e were further confirmed by X-ray crystallography. Non-Cp-based chromium(III) complexes have six-coordinate distorted octahedral geometry, and the heteroatom in the sidearm is coordinated to chromium. When activated by modified methylaluminoxane, complexes 2b and 2c exhibited high activities towards ethylene polymerization. These results indicated that both the donor atoms in side arm and the substituents in backbone significantly affected polymerization behaviors. In order to further explore the structure-reactivity relationship of the catalysts, we synthesized some novel half-sandwich chromium(III) complexes, Cp[(RNC)-N-2(CF3)C(H)(CRO)-O-1]CrCl (3a: R-1 = Bu-t, R-2 = -C6H4OMe(o); 3c: R-1 = Bu-t, R-2 = -C6H4SMe(o); 3e: R-1 = Ph, R-2 = -C6H4SMe(o)) and investigated their potential application in ethylene polymerization under the similar conditions. Complex 3c adopts a three-legged piano stool geometry with a pseudo-octahedral coordination environment, and the heteroatom in the sidearm is not coordinated to chromium. These half-sandwich chromium complexes all displayed high activities for ethylene polymerization under the same conditions. Neither the donor atom in side arm nor the substituent in backbone significantly affected polymerization behaviors, in complete contrast to the results by non-Cp-based chromium catalysts. (C) 2014 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000342185300020 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/50693]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Li, Yue-Sheng |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jing-Yu,Tao, Ping,Li, Yue-Sheng. Synthesis and characterization of novel chromium complexes based on beta-enaminoketonato ligands and their application to ethylene polymerization[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2014,394:162-169. |
| APA | Liu, Jing-Yu,Tao, Ping,&Li, Yue-Sheng.(2014).Synthesis and characterization of novel chromium complexes based on beta-enaminoketonato ligands and their application to ethylene polymerization.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,394,162-169. |
| MLA | Liu, Jing-Yu,et al."Synthesis and characterization of novel chromium complexes based on beta-enaminoketonato ligands and their application to ethylene polymerization".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 394(2014):162-169. |
入库方式： OAI收割
来源：化学研究所
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