Synthesis, structural characterization and biological activities of metal(II) complexes with Schiff bases derived from 5-bromosalicylaldehyde: Ru(II) complexes transfer hydrogenation

Buldurun K., TURAN N., SAVCI A., ÇOLAK N.

JOURNAL OF SAUDI CHEMICAL SOCIETY, cilt.23, ss.205-214, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 23 Konu: 2
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jscs.2018.06.002
  • Sayfa Sayıları: ss.205-214


In this study, two novel Schiff base ligands (L-1 and L-2) derived from condensation of methyl 2-amino-6-methyl-4,5,6,7-tetrahydrothieno[2,3-c]pyridine-3-carboxylate and methyl 2-amino-6-phenyl-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate, both starting matter with 5-bromo-salicylaldehyde, and their Zn(II) and Ni(II) metal complexes have been prepared using a molar ratio of ligand:metal as 1:1 except the Ru(II) complexes 1:0.5. The structures of the obtained ligands and their metal complexes were characterized by elemental analysis, FT-IR, H-1 NMR, C-13 NMR, UV-vis, thermal analysis methods, mass spectrometry, and magnetic susceptibility measurements. Antioxidant and antiradical activity of Schiff base ligands and their metal complexes were been evaluated in vitro tests. Antioxidant activities of metal complexes generally were more effectives than free Schiff bases. 1c and 2c were used as catalysts for the transfer hydrogenation (TH) of ketones. 1c, 2c complexes were found to be efficient catalyst for transfer hydrogenation reactions. (C) 2018 King Saud University. Production and hosting by Elsevier B.V.