Ruthenium(II) complexes bearing N-heterocyclic carbene ligands with wingtip groups and their catalytic activity in the transfer hydrogenation of ketones

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Yiğit B., Isik Y., Barut Celepci D., Evren E., Yiğit M., Gürbüz N., ...More

INORGANICA CHIMICA ACTA, vol.499, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 499
  • Publication Date: 2020
  • Doi Number: 10.1016/j.ica.2019.119199
  • Journal Name: INORGANICA CHIMICA ACTA
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chimica
  • Keywords: N-Heterocyclic carbene, Ruthenium complexes, Silver complexes, Transfer hydrogenation, ASYMMETRIC TRANSFER HYDROGENATION, EFFICIENT TRANSFER HYDROGENATIONS, HALF-SANDWICH COMPLEX, IR-III, RU(II) COMPLEXES, METAL-COMPLEXES, IRIDIUM III, REDUCTION, ALDEHYDES, NITRILES
  • Dokuz Eylül University Affiliated: Yes

Abstract

A series of new silver(I) complexes bearing N-heterocyclic carbene (NHC) ligands with wingtip groups were synthesized by the reaction of 1,3-dialkylimidazolinium salts with silver(I) oxide in dichloromethane. The silver complexes were used as carbene-transfer agents to synthesize ruthenium(II) complexes with the general formula [RuCl2(NHC)(eta(6)-p-cymene)]. All the synthesized complexes were characterized by elemental analysis, FT-IR, H-1 NMR and C-13 NMR spectroscopy, and the molecular and crystal structure of 3d was determined by single-crystal X-ray diffraction. These ruthenium complexes were tested as catalysts in the transfer hydrogenation of ketones using (PrOH)-Pr-i as a hydrogen source. All compounds tested showed good catalytic activity in these reactions.