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

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 mu(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.