Synthesis of linked half sandwich rare-earth metal chlorido and borohydrido complexes and their catalytic behavior towards MMA polymerization
文献类型：期刊论文
| 作者 | Jian ZB ; Zhao W ; Liu XL ; Chen XS ; Tang T ; Cui DM |
| 刊名 | dalton transactions
 |
| 出版日期 | 2010 |
| 卷号 | 39期号:29页码:6871-6876 |
| 关键词 | RING-OPENING POLYMERIZATION STEREOSPECIFIC ISOPRENE POLYMERIZATION ALPHA-OLEFIN POLYMERIZATION N-HETEROCYCLIC CARBENE RAY CRYSTAL-STRUCTURES METHYL-METHACRYLATE EPSILON-CAPROLACTONE STRUCTURAL-CHARACTERIZATION LIVING POLYMERIZATIONS MOLECULAR-STRUCTURES |
| ISSN号 | 1477-9226 |
| 通讯作者 | cui dm |
| 中文摘要 | a series of rare-earth metal complexes attached by an amino-functionalized cyclopentadienyl ligand (c5me4h-c6h4-o-nme2) (1) was prepared. the metathesis reaction of the ligand lithium salt [c5me4h-c6h4-o-nme2]li with lncl(3)(thf)(n) afforded the dichlorido complexes [(c5me4h-c6h4-o-nme2)(2)ln(2)cl(4)][licl(thf)(2)] (ln = y (2a), lu (2b)), which are trinuclear connected by mu(3)-cl and mu(2)-cl multiple bridges. the straightforward metathesis reaction of ln(bh4)(3)(thf)(n) with equimolar [c5me4h-c6h4-o-nme2]li in thf medium yielded the first linked half sandwich ligand stabilized thf-free rare-earth metal bis(borohydrido) complexes (c5me4h-c6h4-o-nme2)ln(bh4)(2) (ln = sc (3a), sm (3b)), respectively. the single component borohydrido complex 3a showed high activity towards the bulk polymerization of methyl methacrylate without specific control, which showed high iso-selectivity (mm = 80%) when the polymerization was performed in benzene medium, and switched to syndio-selectivity (rr = 74% at -20 degrees c) in polar thf medium, whilst the metal chlorido species was inert. the binary catalyst system of 3a/(mgbu2)-bu-n had similar catalytic performances when compared with 3a in thf medium, but provided enriched syndio-control in benzene solution that was in contrast to the iso-control of 3a. surprisingly, 3a upon activation with (buli)-bu-n displayed an extremely high activity (1.1 x 10(6) g mol(sc)(-1) h(-1)) and afforded syndiotactic pmma (rr = 75%) at low polymerization temperature (-20 degrees c) in thf. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000279913100040 |
| 公开日期 | 2012-04-26 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/43605]  |
| 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 | Jian ZB,Zhao W,Liu XL,et al. Synthesis of linked half sandwich rare-earth metal chlorido and borohydrido complexes and their catalytic behavior towards MMA polymerization[J]. dalton transactions,2010,39(29):6871-6876. |
| APA | Jian ZB,Zhao W,Liu XL,Chen XS,Tang T,&Cui DM.(2010).Synthesis of linked half sandwich rare-earth metal chlorido and borohydrido complexes and their catalytic behavior towards MMA polymerization.dalton transactions,39(29),6871-6876. |
| MLA | Jian ZB,et al."Synthesis of linked half sandwich rare-earth metal chlorido and borohydrido complexes and their catalytic behavior towards MMA polymerization".dalton transactions 39.29(2010):6871-6876. |
入库方式： OAI收割
来源：长春应用化学研究所
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