How does the addition of steric hindrance to a typical N-heterocyclic carbene ligand affect catalytic activity in olefin metathesis?
Type
ArticleAuthors
Poater, Albert
Falivene, Laura

Urbina-Blanco, César A.
Manzini, Simone
Nolan, Steven P.

Cavallo, Luigi

KAUST Department
Chemical Science ProgramKAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Date
2013Permanent link to this record
http://hdl.handle.net/10754/562485
Metadata
Show full item recordAbstract
Density functional theory (DFT) calculations were used to predict and rationalize the effect of the modification of the structure of the prototype 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) N-heterocyclic carbene (NHC) ligand. The modification consists in the substitution of the methyl groups of ortho isopropyl substituent with phenyl groups, and here we plan to describe how such significant changes affect the metal environment and therefore the related catalytic behaviour. Bearing in mind that there is a significant structural difference between both ligands in different olefin metathesis reactions, here by means of DFT we characterize where the NHC ligand plays a more active role and where it is a simple spectator, or at least its modification does not significantly change its catalytic role/performance. © 2013 The Royal Society of Chemistry.Citation
Poater, A., Falivene, L., Urbina-Blanco, C. A., Manzini, S., Nolan, S. P., & Cavallo, L. (2013). How does the addition of steric hindrance to a typical N-heterocyclic carbene ligand affect catalytic activity in olefin metathesis? Dalton Transactions, 42(20), 7433. doi:10.1039/c3dt32980aSponsors
The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. CP-FP 211468-2 EUMET. A. P. and L. C. thank BSC (QCM-2010-2-0020), and the HPC team of Enea for using the ENEA-GRID and the HPC facilities CRESCO in Portici (Italy) for access to remarkable computational resources. A. P. thanks the Spanish MICINN for a Ramon y Cajal contract (RYC-2009-05226), European Commission for a Career Integration Grant (CIG09-GA-2011-293900), and Generalitat de Catalunya (2011BE100793). SPN is a Royal Society Wolfson Research Merit Award holder.Publisher
Royal Society of Chemistry (RSC)Journal
Dalton Transactionsae974a485f413a2113503eed53cd6c53
10.1039/c3dt32980a