Half-sandwich Ruthenium(II) Schiff base complexes: Synthesis, characterization and effective catalysts for one-pot conversion of aldehydes to amides

Five new Schiff base ligands and conformationally rigid half-sandwich organo ruthenium(II) Schiff base complexes (1–5) with the general formula [Ru(η6‒p‒cymene)(Cl)(L1-5)] (where, L = mono anionic Schiff base ligands) have been synthesized from the reaction of [{(η6‒p‒cymene)RuCl}2(μ‒Cl)2] with a bidentate Schiff bases ligands. These ruthenium(II) Schiff base complexes were fully characterized by elemental analysis, FT‒IR, UV–Vis, 1H & 13C NMR...