Ansari, R.M.Ramakrishna, D.Badekai Ramachandra, B.R.2026-02-042022Journal of Chemical Sciences, 2022, 134, 4, pp. -9743626https://doi.org/10.1007/s12039-022-02113-6https://idr.nitk.ac.in/handle/123456789/22268The Schiff base ligand 1-(4-((2-hydroxybenzylidene)amino)phenyl)ethan-1-one, obtained from 4-aminoacetophenone and salicylaldehyde, and its complexes with Fe(III), Co(II), Ni(II) and Cu(II) have been synthesized. These complexes were characterized by FTIR spectroscopy, elemental, and SCXRD analysis. FTIR spectra of complexes show the bidentate coordination of metal ions with ligands where O and N are electron-donating sites of the azomethine group. The electronic absorption spectra of these complexes show the characteristics of absorption bands involved in the Fe, Co, and Ni complexes due to their π→π*, n→π* transitions. Further, the geometry of the complexes was deduced from the calculated magnetic moment values and single crystal XRD analysis. Graphical abstract: A Schiff base derived from the condensation reaction between 2-aminoacetophenone and salicylaldehyde was involved in the formation of four different metal complexes, i.e., with Nickel, Cobalt, Iron, and Copper. The synthetic route to forming these complexes followed an easy process, and the complexes were obtained in good yields.[Figure not available: see fulltext.] © 2022, Indian Academy of Sciences.Cobalt compoundsCondensation reactionsCopper compoundsIron compoundsLigandsMagnetic momentsMetal complexesMetal ionsNickel compoundsSingle crystalsSynthesis (chemical)Transition metalsX ray diffractionAminoacetophenoneHydroxybenzylidenePhysicochemical studiesSalicylaldehydeSchiff-baseSchiff-base ligandsSingle-crystal XRDStable complexesThermally stableTransition-metal complexFourier transform infrared spectroscopy