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,Bo; Sun,Guangping; Li,Shihui; Liu,Dongtao; Cui,Dongmei |
| 刊名 | organometallics
 |
| 出版日期 | 2015 |
| 卷号 | 34期号:16页码:4063-4068 |
| 关键词 | 3 COORDINATION CHEMISTRY STEREOSPECIFIC POLYMERIZATION CONJUGATED DIENES CATALYSTS LIGAND PRECURSORS BUTADIENE BEARING 3 4-SELECTIVE LIVING POLYMERIZATION 4-POLYMERIZATION |
| 通讯作者 | li,sh |
| 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 |
| WOS记录号 | WOS:000360322500019 |
| 公开日期 | 2016-05-31 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/65182]  |
| 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 | 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：长春应用化学研究所
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