Synthesis, characterization and properties of iron(II) complexes with a series of tripodal ligands based on the parent ligand tris(2-pyridylmethyl)amine

Iron(II) complexes of the type [Fe(L)(NCS)2] with the tripodal ligand apme (apme = N1-(2-aminoethyl)-N1-(2-pyridyl-methyl)-1,2-ethanediamine) as well as with its derivatives were prepared and structurally characterized. The bond distances thus obtained showed that all complexes investigated were high-spin at the respective temperature. Furthermore [Fe(Me4apme)(NCS)2] was analyzed using Mößbauer spectroscopy that showed that this complex remains in its high-spin state over the entire temperature range.