期刊
ORGANOMETALLICS
卷 31, 期 15, 页码 5527-5532出版社
AMER CHEMICAL SOC
DOI: 10.1021/om300474n
关键词
-
资金
- National Natural Science Foundation of China [21174068]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20110031110009]
- Fundamental Research Funds for the Central Universities
Treatment of the o-hydroxyaryl imidazolium proligands (2-OH-3,5-(Bu2C6H2)-Bu-t)(R)(C3H3N2)Br-+(-) (R = Pr-i (Ia), Bu-t (1b), Ph (1c), Mes (1d)) with 3 equiv of Ag2O afforded the corresponding silver complexes 2a-d. The subsequent metal-exchange reactions with [(p-cymene)-RuCl2](2) at room temperature yielded the desired o-aryloxide-N-heterocyclic carbene p-cymene ruthenium complexes 3a-d in nearly quantitative yields. All the complexes were characterized by H-1 and C-13 NMR, high-resolution mass spectrometry (HRMS), and elemental analysis. The molecular structure of complex 3b was determined by single-crystal X-ray diffraction analysis. The ring-opening metathesis polymerization (ROMP) of norbornene (NBE) with 3a-d was studied. Among them, complex 3d showed high activity and efficiency toward ROMP of NBE at 85 degrees C without the need for any cocatalyst, and polymers with very high molecular weight (>10(6)) and narrow molecular weight distributions were obtained. This complex can also catalyze the alternating copolymerization of NBE and cyclooctene (COE).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据