Pakyapan, BilgeKavukcu, Serdar BatikanSahin, Zarife SibelTurkmen, Hayati2025-03-232025-03-2320200022-328X1872-8561https://doi.org/10.1016/j.jorganchem.2020.121486https://hdl.handle.net/11486/6483A series of monometallic complexes (Ru1-3, Ir-1(-3)) which have N,O-chelating ligand (pyrazine-2carboxylate (1), pyridine-2-carboxylate (2), quinoline carboxylate(3) and bimetallic complexes (Ru-4,Ru-5, Ir-4(,5)) bridged by pyrazine-2,3- dicarboxylate (4) and imidazole-4,5-dicarboxylate(5) were synthesized and characterized by H-1-, C-13 NMR, FT-IR, and elemental analysis. The crystal structure of Ir-2 was determined by X-ray crystallography. The complexes (Ru1-5, Ir1-5) were applied to investigate the electronic and steric effect of ligand in their catalytic activities in transfer hydrogenation and alpha(alpha)-alkylation reaction of ketones with alcohols. The activities of iridium complexes (Ir1-5) were much more efficient than ruthenium complexes (Ru1-5). The highest activity for both reactions was observed for the complex (Ir2 ) with pyridine-2-carboxylate. The Ir hydride species was monitored for both reactions. (C) 2020 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/closedAccessTransfer hydrogenationAlpha alkylation of ketonesN,O-chelate ligandBimetallic complexArticle92510.1016/j.jorganchem.2020.121486Q2WOS:000575166800007Q2