Novel η3-vinylcarbene complexes derived from ruthenium-based olefin metathesis catalysts
Novel η3-vinylcarbene complexes derived from ruthenium-based olefin metathesis catalysts
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DOI：
10.1021/om010314a
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发表时间：
2001-09-03
期刊：
影响因子：
2.8
通讯作者：
Grubbs, RH
中科院分区：
文献类型：
--
作者：
Trnka, TM;Day, MW;Grubbs, RH
富电子的二取代炔烃与 (H(2)IMes)(PCy3)(Cl)(2)Ru=CHPh (1; H(2)IMes = 1,3-二甲苯基-4,5-二氢咪唑-2-亚基)反应形成无膦的 eta (3)-乙烯基卡宾配合物。 (H(2)IMes)(Cl)(2)Ru[eta (3)-(CHPh)(CPh)(CPh)] (2) 的 X 射线衍射研究证实了这种不寻常的结构。这些配合物与烯烃复分解和炔聚合的机制有关。
Electron-rich, disubstituted alkynes react with (H(2)IMes)(PCy3)(Cl)(2)Ru=CHPh (1; H(2)IMes = 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene) to form phosphine-free eta (3)-vinylcarbene complexes. An X-ray diffraction study on (H(2)IMes)(Cl)(2)Ru[eta (3)-(CHPh)(CPh)(CPh)] (2) confirms the unusual structure. These complexes are relevant to the mechanisms of olefin metathesis and alkyne polymerization.