Synthesis, thermal, electrochemical and catalytic behavior toward transfer hydrogenation investigations of the half-sandwich RuII complexes with 2-(2′-quinolyl)benzimidazoles

Erdem A., Kılınçarslan R., Şahin Ç., DAYAN O., Özdemir N.

Journal of Molecular Structure, vol.1220, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1220
  • Publication Date: 2020
  • Doi Number: 10.1016/j.molstruc.2020.128556
  • Journal Name: Journal of Molecular Structure
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chimica, Compendex, INSPEC
  • Keywords: Benzimidazole, Hydrogenation, Ketones, NN-type ligands, Piano-stool complexes, RuII complexes
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

A series ligands (L3-14) of derived from 2-(2′-quinolyl)benzimidazole (QuBim, L1) and 2-(2′-quinolyl)-5,6-dimethylbenzimidazole (QuDmBim, L2) which are an NN-type ligands have been synthesized and characterized with various techniques such as NMR, UV–vis, FT-IR spectroscopy, elemental analysis and X-ray diffraction. The substituted ligands derived from QuBim and QuDmBim have been used as sustaining ligands in the RuII-catalyzed transfer hydrogenation (TH) of acetophenone to secondary alcohols in the presence i-PrOH/KOH. The half-sandwich complexes (C1-14) of RuII with NN-type ligands have been synthesized by cleavage of [(η6-p-cymene)Ru(μ-Cl)]2 dimer. The resulting complexes have been characterized by NMR, UV–vis, FT-IR spectroscopy and elemental analysis. The thermal and electrochemical properties of selected complexes and ligands were investigated.