Isoprene Polymerization with Iminophosphonamide Rare-Earth-Metal Alkyl Complexes: Influence of Metal Size on the Regio- and Stereoselectivity
文献类型：期刊论文
| 作者 | Liu, Bo1,2; Sun, Guangping2; Li, Shihui1; Liu, Dongtao1; Cui, Dongmei1 |
| 刊名 | ORGANOMETALLICS
 |
| 出版日期 | 2015-08-24 |
| 卷号 | 34期号:16页码:4063-4068 |
| 英文摘要 | The protonolysis reaction of beta-iminophosphonamine ligand (NPNdipp = Ph2P((NC6H3Pr2)-Pr-i-2,6)(2)) with one equivalent of rare-earth-metal tris(alkyl)s afforded the corresponding bis(alkyl) complexes NPN(dipp)Ln-(CH2SiMe3)(2)(THF) (Ln = Sc (1), Lu (2), Y (3), Er (4)). The bis(4-methylbenzyl) complexes NPN(dipp)Ln(CH2Ph-4Me)(2)(THF) (Ln = Nd (5), La (6)) were prepared by treatment of the tris(4-methylbenzyl) compounds Ln(CH2Ph-4-Me)(3)(THF)(3) with beta-iminophosphonamine ligand. The small-size rare-earth-metal-based complexes 1-4 upon activation with (AlBu3)-Bu-i and [Ph3C] [B(C6F5)(4)] showed high 3,4-selectivities up to 98.1% for isoprene polymerization. When the larger size rare-earth-metal-based 4-methylbenzyl complexes 5 and 6 were employed instead, moderate 3,4-selectivities were obtained since the opening coordination environment facilitated the 1,4-enchainment (Nd3+: 76.1%; La3+: 62.9%). Replacing (AlBu3)-Bu-i by AlEt3, the 5 and 6 systems exhibited high activity and excellent trans-1,4 selectivity for both isoprene (96.5%, 0 degrees C) and butadiene (92.8%, 20 C) polymerizations. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-10-27 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/27683]  |
| 专题 | 化学研究所_高分子物理与化学实验室 |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Jilin Univ, Dept Mat Sci & Engn, Key Lab Automobile Mat, Minist Educ, Changchun 130025, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Bo,Sun, Guangping,Li, Shihui,et al. Isoprene Polymerization with Iminophosphonamide Rare-Earth-Metal Alkyl Complexes: Influence of Metal Size on the Regio- and Stereoselectivity[J]. ORGANOMETALLICS,2015,34(16):4063-4068. |
| APA | Liu, Bo,Sun, Guangping,Li, Shihui,Liu, Dongtao,&Cui, Dongmei.(2015).Isoprene Polymerization with Iminophosphonamide Rare-Earth-Metal Alkyl Complexes: Influence of Metal Size on the Regio- and Stereoselectivity.ORGANOMETALLICS,34(16),4063-4068. |
| MLA | Liu, Bo,et al."Isoprene Polymerization with Iminophosphonamide Rare-Earth-Metal Alkyl Complexes: Influence of Metal Size on the Regio- and Stereoselectivity".ORGANOMETALLICS 34.16(2015):4063-4068. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。