Syntheses, structures, electrochemistry and magnetic properties of chain-like dicyanamide manganese(iii) and iron(iii) complexes with salen ligand

Two dicyanamide (dca) MIII complexes with salen ligand, [MnIII(salen)(dca)]n (1) and [FeIII(salen)(dca)]n (2), were synthesized and characterized. X-Ray diffraction analyses revealed the two complexes have a similar one-dimensional zig-zag chain structure constructed by μ1,5-dca bridge. Magnetic susceptibility measurements indicate the presence of antiferromagnetic interactions between two intra-chain high-spin MnIII ions and between two intra-chain low-spin FeIII ions via the dca bridge. The electrochemical properties of the two complexes were studied by cyclic voltammetry.