Silica-Supported Tungsten Carbynes (SiO)xW(CH)(Me)y (x=1, y=2; x=2, y=1): New Efficient Catalysts for Alkyne Cyclotrimerization
Silica-Supported Tungsten Carbynes (SiO)xW(CH)(Me)y (x=1, y=2; x=2, y=1): New Efficient Catalysts for Alkyne Cyclotrimerization
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DOI：
10.1021/om500684e
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发表时间：
2015-02-23
期刊：
影响因子：
2.8
通讯作者：
Basset, Jean-Marie
中科院分区：
文献类型：
--
作者：
Riache, Nassima;Dery, Alexandre;Basset, Jean-Marie
报道了二氧化硅负载的碳炔钨络合物 (SiO)(x)W(CH)(Me)(y) (x = 1, y = 2; x = 2, y = 1) 对炔烃的活性。我们发现它们是高 TON 末端炔环三聚的有效预催化剂。我们还证明该催化剂对炔环三聚反应具有活性，且不会形成明显的炔复分解产物。额外的 DFT 计算强调了 W 配位球在支持该实验行为中的重要性。
The activity of silica-supported tungsten carbyne complexes ( SiO)(x)W( CH)(Me)(y) (x = 1, y = 2; x = 2, y = 1) toward alkynes is reported. We found that they are efficient precatalysts for terminal alkyne cyclotrimerization with high TONs. We also demonstrate that this catalyst species is active for alkyne cyclotrimerization without the formation of significant alkyne metathesis products. Additional DFT calculations highlight the importance of the W coordination sphere in supporting this experimental behavior.