New neutral nickel(II) complexes bearing pyrrole-imine chelate ligands: synthesis, structure and norbornene polymerization behavior
文献类型：期刊论文
| 作者 | Li, YS; Li, YR; Li, XF |
| 刊名 | JOURNAL OF ORGANOMETALLIC CHEMISTRY
 |
| 出版日期 | 2003-02-03 |
| 卷号 | 667期号:1-2页码:185-191 |
| 关键词 | Neutral Ni(Ii) Complexes Catalysts Norbornene Vinylic Polymerization |
| ISSN号 | 0022-328X |
| DOI | 10.1016/S0022-328X(02)02181-2 |
| 英文摘要 | New neutral nickel(II) complexes bearing nonsymmetric bidentate pyrrole-imine chelate ligands (4a-d), [2-(ArNCH)C4H3N]Ni(PPh3)Ph [Ar=2,6-diisopropylphenyl (a), 2-methyl-6-isopropylphenyl (b), 2,6-diethylphenyl (c), 2-tert-butylphenyl (d)], have been prepared in good yields from the sodium salts of the corresponding ligands and trans-Ni(PPh3)(2)(Ph)Cl, and the structure of complex 4a has been confirmed by X-ray crystallographic analysis. These neutral Ni(II) complexes were investigated as catalysts for the vinylic polymerization of norbornene. Using modified methylaluminoxane (MMAO) as a cocatalyst, these complexes display very high activities and produce great mass polymers. Catalyst activity of up to 4.2 x 10(7) g (mol Ni h)(-1) and the viscosity-average molecular weight of polymer of up to 9.2 x 10(5) g mol(-1) were observed. Catalyst activity, polymer yield, and polymer molecular weight can be controlled over a wide range by the variation of reaction parameters such as Al-Ni ratio, norbornene-catalyst ratio, monomer concentration, polymerization reaction temperature and time. (C) 2003 Elsevier Science B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000181147000025 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/81487]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Li, YS |
| 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 | Li, YS,Li, YR,Li, XF. New neutral nickel(II) complexes bearing pyrrole-imine chelate ligands: synthesis, structure and norbornene polymerization behavior[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY,2003,667(1-2):185-191. |
| APA | Li, YS,Li, YR,&Li, XF.(2003).New neutral nickel(II) complexes bearing pyrrole-imine chelate ligands: synthesis, structure and norbornene polymerization behavior.JOURNAL OF ORGANOMETALLIC CHEMISTRY,667(1-2),185-191. |
| MLA | Li, YS,et al."New neutral nickel(II) complexes bearing pyrrole-imine chelate ligands: synthesis, structure and norbornene polymerization behavior".JOURNAL OF ORGANOMETALLIC CHEMISTRY 667.1-2(2003):185-191. |
入库方式： OAI收割
来源：化学研究所
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