Heteroleptic ruthenium(II) complexes of 2-(2-pyridyl)benzimidazoles: A study of catalytic efficiency towards transfer hydrogenation of acetophenone

DAYAN O., Demirmen S., Özdemir N.

POLYHEDRON, vol.85, pp.926-932, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 85
  • Publication Date: 2015
  • Doi Number: 10.1016/j.poly.2014.10.012
  • Journal Name: POLYHEDRON
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Index Chemicus (IC)
  • Page Numbers: pp.926-932
  • Keywords: Ru(II) complexes, Transfer hydrogenation, Benzimidazoles, Acetophenone, Pyridines, PYRIDINE-BASED TRIDENTATE, POLYPYRIDYL COMPLEXES, LIGANDS, KETONES, REDOX, DERIVATIVES, BINDING, DESIGN, CELLS
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Six ruthenium(II) complexes ([RuCl2(p-cymene)(L1-6)], SD1-6, (L1-6: bidentate pyridyl-benzimidazole ligands)) were synthesized from [RuCl2(p-cymene)](2) dimer and bidentate pyridyl-benzimidazole ligands. The compounds were characterized by elemental analysis, IR, UV-Vis, NMR and X-ray diffraction. The synthesized Ru(II) complexes (SDI-6) were tested as catalysts for the catalytic transfer hydrogenation (CH) of acetophenone to secondary alcohols in the presence of KOH using 2-propanol as a hydrogen source at 82 degrees C. All complexes were active catalysts for TM of acetophenone with good yields under mild conditions (after 15 min, yields of up to 91%). (C) 2014 Elsevier Ltd. All rights reserved.