Transition metal complexes with thiosemicarbazide-based ligands, part 47: Synthesis, physicochemical and voltammetric characterization of iron(III) complexes with pyridoxal semi-, thiosemi- and S-meth

• Published in: Journal of the Serbian Chemical Society 2003, Vol.68 (12), p.929-942
• Main Authors: Jevtovic, Violeta, Jovanovic, Ljiljana, Leovac, Vukadin, Bjelica, Luka
• Format: Article
• Language: English
• Subjects: iron(iii) complexes; physicochemical and voltammetric studies; pyridoxal semi; thiosemi- and isothiosemicarba- zones
• ISSN: 0352-5139; 1820-7421
• DOI: 10.2298/JSC0312929J

The reaction of warm EtOH solutions of FeX3.nH2O (X=Cl, NO3) with tridentate ONX (X=O, S, N) pyridoxal semi-, thiosemi- and S-methylisothiosemicabazones (H2L1, H2L2, H2L3, respectively) yielded high-spin octahedral mono- and bis(ligand) complexes of the formula [Fe(H2L1-3)Cl2(H2O)]Cl,[Fe(HL1,2)2]Cl.nH2O and [Fe(H2L3)(HL3)]NO3)2.H2O. The compounds were characterized by elemental analysis, conductometric and magnetochemical measurements, IR and UV-Vis spectra. Besides, a detailed voltammetric study of the complexes was carried out in DMF solution in the presence of several supporting electrolytes, to characterize the nature of the electrode processes and solution equilibria. Reakcijom toplih EtOH rastvora FeX3.nH2O (X=Cl, NO3) sa tridentatnim semi tio- semi- i S-metilizotiosemikarbazonom piridoksala (H2L1, H2L2, odnosno H2L3) dobijeni su visokospinski oktaedarski mono- i bis(ligand) kompleksi formula [Fe(H2L1-3)Cl2(H2O)]Cl,[Fe(HL1,2)2]Cl.nH2O i [Fe(H2L3)(HL3) (NO3)2.H2O. Jedinjenja su okarakterisana elementalnom analizom konduktometrijskim i magnetohemijskim merenjima, kao i IR i UV-Vis spektrima. Izvrseno je detaljno voltametrijsko ispitivanje dobijenih jedinjenja u DMF u nekoliko pomocnih elektrolita, istrazene su priroda elektrohemijskih procesa i ravnoteze u rastvoru.