Synthesis, structure and magnetism of manganese and iron dipicolinates with N,N′-donor ligands

•Six ionic complexes were magneto-structurally characterized.•Enriched supramolecular hydrogen-bonding networks are presented.•Mn(III) dipicolinates report angular distortion.•Fe(III) dipicolinates report antiferromagnetic exchange interaction.

New ionic manganese(II/III), manganese(III) and iron(II/III) complexes of the formula [MnII(H2O)2(phen)2]{[MnIII(dipic)2]}2·7H2O, (dmphenH)[MnIII(dipic)2]·2H2O, (2,2′-bipyH)[MnIII(dipic)2]·3H2O, (4,4′-bipyH)[MnIII(dipic)2]·4H2O, [FeII(phen)3]{[FeIII(dipic)2]}2·4.83H2O and [FeII(2,2′-bipy)3]{[FeIII(dipic)2]}2·6.11H2O where dipic2− = pyridine-2,6-dicarboxylate anion, phen = 1,10-phenanthroline, dmphenH = 2,9-dimethyl-1,10-phenanthrolinium cation, 2,2′-bipyH = 2-(2-pyridyl)pyridinium cation, 4,4′-bipyH = 4-(4-pyridyl)pyridinium cation, have been prepared and characterized by the single-crystal X-ray structure analysis, infrared spectroscopy, and by magnetic susceptibility and magnetization measurements. A zero field splitting was found in the Mn(III) dipicolinates while an antiferromagnetic exchange interaction was present in the Fe(III) dipicolinates.

Graphical abstractNew ionic manganese(II/III), manganese(III) and iron(II/III) dipicolinates have been prepared and characterized by the single-crystal X-ray structure analysis and by magnetic susceptibility and magnetization measurements. A zero field splitting was found in the Mn(III) dipicolinates while an antiferromagnetic exchange interaction was present in the Fe(III) dipicolinates.Figure optionsDownload full-size imageDownload as PowerPoint slide