The activation mechanism of Fe-based olefin metathesis catalysts

Abstract
Density functional theory calculations have been used to describe the first turnover for olefin metathesis reaction of a homogenous Fe-based catalyst bearing a N-heterocyclic carbene ligand with methoxyethene as a substrate. Equal to conventional Ru-based catalysts, the activation of its Fe congener occurs through a dissociative mechanism, however with a more exothermic reaction energy profile. Predicted upper energy barriers were calculated to be on average ∼2 kcal/mol more beneficial for Fe catalyzed metathesis. Overall, this present computational study emphasises on advantages of Fe-based metathesis and gives a potential recipe for the design of an efficient Fe-based olefin metathesis catalysts. © 2014 Elsevier B.V.

Citation
Poater, A., Pump, E., Vummaleti, S. V. C., & Cavallo, L. (2014). The activation mechanism of Fe-based olefin metathesis catalysts. Chemical Physics Letters, 610-611, 29–32. doi:10.1016/j.cplett.2014.06.063

Acknowledgements
E.P. gratefully acknowledges to Chemical Monthly of the Austrian Academy of Science (OAW) for financial support. A.P. thanks the Spanish MINECO for a Ramon y Cajal contract (RYC-2009-05226) and European Commission for a Career Integration Grant (CIG09-GA-2011-293900). We thank Prof. C. Slugovc for helpful discussions.

Publisher
Elsevier BV

Journal
Chemical Physics Letters

DOI
10.1016/j.cplett.2014.06.063

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