The role of N-heterocyclic carbene substituents on ruthenium(II) complexes in the catalytic transfer hydrogenation of acetophenone

Authors : Muhammet Emin GÜNAY, Gülcan Gençay ÇOĞAŞLIOĞLU

Pages : 296-304

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The novel rutheniuminsert ignore into journalissuearticles values(II); complexes [RuCl$_{2}$insert ignore into journalissuearticles values(NHC);insert ignore into journalissuearticles values($p$-cymene);], \textbf{3a}--\textbf{e}, containing 1-alkyl-3-benzylimidazol-2-ylidene ligands were prepared. All synthesized compounds were characterized by NMR spectroscopy and elemental analyses. Ruinsert ignore into journalissuearticles values(II);-NHC complexes were tested as catalysts for the transfer hydrogenation of acetophenone, showing modest to high activity in this reaction. The results revealed that efficiencies depend on the substituents of the benzene ring of the benzyl on the N atom of the NHC ring.
Keywords : N heterocyclic carbene ligands, substituent effect, transfer hydrogenation, ruthenium complexes, silver N heterocyclic carbene complexes