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Silica-Supported Tungsten Carbynes (≡SiO)xW(≡CH)(Me)y (x = 1, y = 2; x = 2, y = 1): New Efficient Catalysts for Alkyne Cyclotrimerization

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)

© Organometallics, 2015, vol. 34, núm. 4, p. 690-695

American Chemical Society (ACS)

Author: Riache, Nassima
Dery, Alexandre
Callens, Emmanuel
Poater Teixidor, Albert
Samantaray, Manoja K.
Dey, Raju
Hong, Jinhua
Li, Kun
Cavallo, Luigi
Basset, Jean Marie
Date: 2015 February 23
Abstract: 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)
Format: application/pdf
ISSN: 0276-7333 (versió paper)
1520-6041 (versió electrònica)
Document access: http://hdl.handle.net/10256/13299
Language: eng
Publisher: American Chemical Society (ACS)
Collection: MINECO/PN 2012-2015/RYC-2009-05226
Reproducció digital del document publicat a: http://dx.doi.org/10.1021/om500684e
Articles publicats (D-Q)
info:eu-repo/grantAgreement/EC/FP7/293900
Is part of: © Organometallics, 2015, vol. 34, núm. 4, p. 690-695
Rights: Tots els drets reservats
Subject: Funcional de densitat, Teoria del
Density functionals
Compostos organometàl·lics
Organometallic compounds
Catalitzadors organometàl·lics
Organometallic catalysts
Title: Silica-Supported Tungsten Carbynes (≡SiO)xW(≡CH)(Me)y (x = 1, y = 2; x = 2, y = 1): New Efficient Catalysts for Alkyne Cyclotrimerization
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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