Electronic effects in mixed N-heterocyclic carbene/phosphite indenylidene ruthenium metathesis catalysts. Issue 30 (5th July 2019)

• Record Type: Journal Article
• Authors: Bidal, Yannick D.; Urbina-Blanco, César A.; Poater, Albert; Cordes, David B.; Slawin, Alexandra M. Z.; Cavallo, Luigi; Cazin, Catherine S. J.
• Is Part Of: Dalton transactions. Volume 48:Issue 30(2019)
• Page Start: 11326
• Page End: 11337
• Publication Date: 2019-07-05
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt01811e
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Experimental and computational studies shed light on the role played by sacrificial ligand electronic properties on catalytic activity. Abstract : Five new complexes [RuCl2 (SIMes)(Ind)(O- p XC5 H4 )] 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- p CF3 C5 H4 )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.