First-row transition metal complexes of a novel pentadentate amine/imine ligand containing a hexahydropyrimidine core

► A novel triimino diamine ligand has been prepared. ► The ligand has a hexahydropyrimidine core. ► The coordination geometry of first-row transition metal complexes is distorted octahedral or square-pyramidal, as applicable. ► Iron(II) complexes are readily accessible. ► Iron(III) complexes proved inaccessible.