| 二价镧系均配金属化合物“Open-Metallocenes”——双(2,4-二叔丁基戊二烯基)钐和镱配合物 |
| Homoleptic Divalent Lanthanide “Open-Metallocenes” —Bis(2,4-tBu2-pentadienyl)Sm and Yb Complexes |
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| 摘要: 双(2,4-二叔丁基戊二烯基)镧系金属化合物(η5-Pdl')2Yb(THF)(1)和(η5-Pdl')2Sm(DME)(2)可以经LnI2和2,4-二叔丁基戊二烯基钾(K(Pdl'))由置换反应制得。K(Pdl')和LnCl3发生氧化还原反应也能够得到化合物1和2。对2个化合物进行了表征。X射线单晶衍射结果显示,2个化合物中Pdl'基都是以η5模式配位到金属上。2个化合物都能够在室温下引发己内酯聚合并表现出高活性,得到分子量分布窄的聚己内酯。 |
| 关键词: 钐 镱 戊二烯基 聚合 己内酯 |
| 基金项目: 国国家自然科学基金(No.21405095),山东省高等学校科技计划项目(No.J14LC09)资助项目。 |
| Abstract: The bis(2,4-tBu2-pentadienyl)lanthanide complexes (η5-Pdl')2Yb(THF) (1) and (η5-Pdl')2Sm(DME) (2) were successfully prepared in high yield by direct salt metathesis between LnI2 and 2,4-di-butyl-pentadienyl potassium(K(Pdl')). Complexes 1 and 2 could also be obtained smoothly from the reaction of LnCl3 and K(Pdl') through oxidation-reduction reaction. These two compounds were characterized and the X-ray single crystal analysis revealed a predominantly η5-pentadienyl-metal bonding. Both two compounds could initiate ring-opening polymerization of ε-caprolactone rapidly at room temperature and led to narrow polydispersities with high activity. |
| Keywords: Samarium Ytterbium pentadienyl polymerization ε-caprolactone |
| 投稿时间：2015-02-15 修订日期：2015-04-20 |
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| 陈润海,王平,刘青,董云会,李月云.二价镧系均配金属化合物“Open-Metallocenes”——双(2,4-二叔丁基戊二烯基)钐和镱配合物[J].无机化学学报,2015,31(6):1239-1244. |
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