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Issue 30, 2019
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Electronic effects in mixed N-heterocyclic carbene/phosphite indenylidene ruthenium metathesis catalysts

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Abstract

Five new complexes [RuCl2(SIMes)(Ind)(O-pXC5H4)] bearing different para-substituted triphenylphosphites (X = H, OCH3, CF3, Cl, SF5 and CN) were synthesised and used to study the effect of the electronic properties of the phosphite on olefin metathesis activity. Investigations of the physical properties of the new ligands and complexes were performed using physicochemical and DFT calculations. The catalytic activity of the complexes was benchmarked in challenging ring closing metathesis transformations featuring the formation of tetra-substituted double bonds. Complex [RuCl2(SIMes)(Ind)P(O-pCF3C5H4)3] (3c) exhibited a particularly high catalytic activity, superior to state-of-the-art catalysts, and was further tested on a wide range of substrates.

Graphical abstract: Electronic effects in mixed N-heterocyclic carbene/phosphite indenylidene ruthenium metathesis catalysts

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Publication details

The article was received on 30 Apr 2019, accepted on 25 Jun 2019 and first published on 05 Jul 2019


Article type: Paper
DOI: 10.1039/C9DT01811E
Dalton Trans., 2019,48, 11326-11337

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    Electronic effects in mixed N-heterocyclic carbene/phosphite indenylidene ruthenium metathesis catalysts

    Y. D. Bidal, C. A. Urbina-Blanco, A. Poater, D. B. Cordes, A. M. Z. Slawin, L. Cavallo and C. S. J. Cazin, Dalton Trans., 2019, 48, 11326
    DOI: 10.1039/C9DT01811E

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