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

Erdem A., KILINÇARSLAN R., ŞAHİN 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: Hydrogenation, Ru-II complexes, Ketones, NN-type ligands, Benzimidazole, Piano-stool complexes, ASYMMETRIC TRANSFER HYDROGENATION, PYRIDINE-BASED TRIDENTATE, RUTHENIUM(II) COMPLEXES, LIGANDS SYNTHESIS, X-RAY, KETONES, BENZIMIDAZOLE, BEARING, DERIVATIVES, REDUCTION
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

A series ligands (L3-14) of derived from 2-(2'-quinolyl)benzimidazole (QuBim, L-1) and 2-(2'-quinolyl)-5,6-dimethylbenzimidazole (QuDmBim, L-2) 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 Ru-II-catalyzed transfer hydrogenation (TH) of acetophenone to secondary alcohols in the presence i-PrOH/KOH. The half-sandwich complexes (C1-14) of Ru-II with NN-type ligands have been synthesized by cleavage of [(eta(6)-p-cymene)Ru(mu-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. (C) 2020 Elsevier B.V. All rights reserved.