Accessible, Highly Active Single-Component beta-Ketiminato Neutral Nickel(II) Catalysts for Ethylene Polymerization
文献类型：期刊论文
| 作者 | Song DP ; Wu JQ ; Ye WP ; Mu HL ; Li YS |
| 刊名 | organometallics
 |
| 出版日期 | 2010 |
| 卷号 | 29期号:10页码:2306-2314 |
| 关键词 | OLEFIN POLYMERIZATION NORBORNENE POLYMERIZATION COMPLEXES BEARING NI(II) COMPLEXES NI(II)-CATALYZED POLYMERIZATION PALLADIUM(II) COMPLEXES AQUEOUS DISPERSIONS REMOTE SUBSTITUENTS BULKY SUBSTITUENTS MOLECULAR-WEIGHT |
| ISSN号 | 0276-7333 |
| 通讯作者 | li ys |
| 中文摘要 | a series of novel neutral nickel complexes based on cyclic beta-ketiminato ligands, [(2,6-(pr2c6h3)-pr-i)n=chc6h8o]ni(ph)(pph3) (3b), [(2,6-ipr(2)c(5)h(3))n=chcn+3h2n+2o(c6h4)] ni(ph)(pph3) (6a-c), and [(2,6-(pr2c6h3)-pr-i)n=chcn+3h2n+2o(c6h4)]ni(ch3)(py) (7a-c: a, n = 0; b, n = 1; c, n = 2) have been synthesized and characterized. these conveniently accessible complexes proved to be highly active catalysts for ethylene polymerization without an activator. under the optimized conditions, an activity of 71.4 kg of pe/((mol of ni) h atm) was observed using 6c as a catalyst. particularly, it is of great interest that a bulky substituent proximate to the oxygen atom of the beta-ketiminato complex is no longer a prerequisite to attain high catalytic efficiency, which is much different from the case for salicylaldiminato neutral nickel catalysts. this is effectively supported by the lower activation enthalpy changes of complexes 3b and 6a-c relative to values for the classic salicylaldiminato complexes. moreover, for complexes 6a-c and 7a-c. the degree of conjugation between the phenylene ring and the corresponding nickel chelate of the complex can be tuned via changes in the ligand structure, which remarkably influence the molecular weights and the microstructures of the resulting polyethylenes. in comparison with the highly conjugated complexes 6a and 7a, complexes 6b,c and 7b,c, with a low degree of conjugation, produced polyethylenes with much higher molecular weights and lower branch contents. x-ray crystallographic analysis of 3b and 6a c provides detailed information about the differences among these structures, and various typical angles and bond distances produce evidence of the conjugation modulation effect. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000277597500013 |
| 公开日期 | 2012-06-06 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/43721]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Song DP,Wu JQ,Ye WP,et al. Accessible, Highly Active Single-Component beta-Ketiminato Neutral Nickel(II) Catalysts for Ethylene Polymerization[J]. organometallics,2010,29(10):2306-2314. |
| APA | Song DP,Wu JQ,Ye WP,Mu HL,&Li YS.(2010).Accessible, Highly Active Single-Component beta-Ketiminato Neutral Nickel(II) Catalysts for Ethylene Polymerization.organometallics,29(10),2306-2314. |
| MLA | Song DP,et al."Accessible, Highly Active Single-Component beta-Ketiminato Neutral Nickel(II) Catalysts for Ethylene Polymerization".organometallics 29.10(2010):2306-2314. |
入库方式： OAI收割
来源：长春应用化学研究所
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