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

Abstract

Two dicyanamide (dca) M^III complexes with salen ligand, [Mn^III(salen)(dca)]_n (1) and [Fe^III(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 μ_1,5-dca bridge. Magnetic susceptibility measurements indicate the presence of antiferromagnetic interactions between two intra-chain high-spin Mn^III ions and between two intra-chain low-spin Fe^III ions via the dca bridge. The electrochemical properties of the two complexes were studied by cyclic voltammetry.