Ruthenium olefin metathesis catalysts containing fluoride
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The reaction of the ruthenium complex cis-Caz-1 with silver fluoride affords the first example of an active olefin metathesis pre-catalyst containing fluoride ligands. The cis geometry of the precursor complex is key to the successful fluoride exchange reaction. Computational studies highlight the stability of the new Ru-F species, due to push-pull interactions between fluoride and L-type ligands (L: N-heterocyclic carbene, phosphite). Insights into the isomerization process from trans-Caz-1 to cis-Caz-1 are given. Fluoride exchange reactions were performed involving cis- and trans-Caz-1 complexes. Catalytic tests showcase the excellent activity of the Ru-F containing complexes.
Guidone , S , Songis , O , Falivene , L , Nahra , F , Slawin , A M Z , Jacobsen , H , Cavallo , L & Cazin , C S J 2015 , ' Ruthenium olefin metathesis catalysts containing fluoride ' ACS Catalysis , vol 5 , no. 7 , pp. 3932–3939 . DOI: 10.1021/acscatal.5b00219
Copyright © 2015 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Catalysis, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acscatal.5b00219
The authors gratefully acknowledge the EC through the 7th framework program (grant CP-FP 211468-2 EUMET), the Royal Society (University Research Fellowship to CSJC) for financial support.