2026-04-18T04:24:40Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/132992024-06-18T13:52:17Zcom_2072_452955com_2072_2054col_2072_453073

00925njm 22002777a 4500 dc Riache, Nassima author Dery, Alexandre author Callens, Emmanuel author Poater Teixidor, Albert author Samantaray, Manoja K. author Dey, Raju author Hong, Jinhua author Li, Kun author Cavallo, Luigi author Basset, Jean-Marie author info:eu-repo/date/embargoEnd/2026-01-01 info:eu-repo/date/embargoEnd/2026-01-01 2015-02-23 The activity of silica-supported tungsten carbyne complexes (≡SiO)xW(≡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 A.P. thanks the Spanish MINECO for a Ramón y Cajal contract (RYC-2009-05226) and the European Commission for a Career Integration Grant (CIG09-GA-2011-293900) http://hdl.handle.net/10256/13299 Funcional de densitat, Teoria del Density functionals Compostos organometàl·lics Organometallic compounds Catalitzadors organometàl·lics Organometallic catalysts Silica-Supported Tungsten Carbynes (≡SiO)xW(≡CH)(Me)y (x = 1, y = 2; x = 2, y = 1): New Efficient Catalysts for Alkyne Cyclotrimerization