Synthesis and characterization of the titanium complexes bearing two beta-enaminoketonato ligands with electron withdrawing groups/modified phenyls and their behaviors for ethylene (co-) polymerization
文献类型：期刊论文
| 作者 | Ye WP ; Shi XC ; Li BX ; Liu JY ; Li YS ; Cheng YX ; Hu NH |
| 刊名 | dalton transactions
 |
| 出版日期 | 2010 |
| 卷号 | 39期号:38页码:9000-9007 |
| 关键词 | IMINE CHELATE LIGANDS PROPYLENE POLYMERIZATION LIVING POLYMERIZATION ZIRCONIUM COMPLEXES NORBORNENE COPOLYMERIZATIONS INSERTION POLYMERIZATION ELEVATED-TEMPERATURES NICKEL-COMPLEXES CATALYST DESIGN ALPHA-OLEFINS |
| ISSN号 | 1477-9226 |
| 通讯作者 | liu jy |
| 中文摘要 | series of new titanium complexes with two asymmetric bidentate beta-enaminoketonato [n,o] ligands (2b-t), [phn=c(cf3)chc(ar)o](2)ticl2 (2b, ar = -c6h4f(o); 2c, ar = -c6h4f(m); 2d, ar = -c6h4f(p); 2e, ar = -c6h4cl(p); 2f, ar = -c6h4ome(p); 2g, ar = -c6h4cf3(p); 2h, ar = -c6h4cf3(m); 2i, ar = -c6h4cf3(o); 2j, ar = -c6h4cl(o); 2k, ar = -c6h4br(o); 2l, ar = -c6h4i(o); 2m, ar = -c6h3f2(2,4); 2n, ar = -c6h3f2(2,6); 2o, ar = -c6h3f2(3,4); 2p, ar = -c6h3f2(3,5); 2q, ar = -c6f5; 2r, ar = c6f4ome; 2s, ar = -c6h3cl2(2,6); 2t, ar = -c6h3cl2(2,5)), have been synthesized based on substituted acetophenones. x-ray analyses reveal that complexes 2h, 2k, 2m, and 2n adopt distorted octahedral geometry around the titanium center, in which the two chloride ligands are situated in the cis-orientation. 2s also adopts distorted octahedral geometry, but the two chloride ligands in it are situated in the trans-orientation due to the increase of the steric effect of the phenyl derived from the acetophenone. the influence of the substituent effects on catalyst performance, including catalytic activities and the molecular weight distribution of the polymers obtained, was investigated in detail. with modified methylaluminoxane (mmao) as a cocatalyst, complexes 2b-r and 2t are active catalysts for ethylene polymerization at room temperature, and produce high molecular weight polymers. it is observed that the catalytic activities are significantly enhanced by introducing some electron-withdrawing groups, such as f, cl and cf3, into the suitable positions of the phenyl ring close to the oxygen donor. it should be noted that complexes 2c-i, 2p, 2n and 2t are also capable of promoting the living copolymerization of ethylene with norbornene at room temperature, yielding high molecular weight copolymers with narrow molecular weight distributions (pdi = 1.05-1.30). |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000282006200019 |
| 公开日期 | 2012-04-25 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/43457]  |
| 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 | Ye WP,Shi XC,Li BX,et al. Synthesis and characterization of the titanium complexes bearing two beta-enaminoketonato ligands with electron withdrawing groups/modified phenyls and their behaviors for ethylene (co-) polymerization[J]. dalton transactions,2010,39(38):9000-9007. |
| APA | Ye WP.,Shi XC.,Li BX.,Liu JY.,Li YS.,...&Hu NH.(2010).Synthesis and characterization of the titanium complexes bearing two beta-enaminoketonato ligands with electron withdrawing groups/modified phenyls and their behaviors for ethylene (co-) polymerization.dalton transactions,39(38),9000-9007. |
| MLA | Ye WP,et al."Synthesis and characterization of the titanium complexes bearing two beta-enaminoketonato ligands with electron withdrawing groups/modified phenyls and their behaviors for ethylene (co-) polymerization".dalton transactions 39.38(2010):9000-9007. |
入库方式： OAI收割
来源：长春应用化学研究所
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