Syntheses, structures and magnetic properties of cyano-bridged Sm(III)M(V) (M = Mo, W) assemblies with zigzag chains

The reaction of Sm3+ ion with [M(CN)8]3− (M = W, Mo) units in the presence of the chelated ligand phen has isolated two octacyanometalate-based assemblies [Sm(phen)(DMF)5][M(CN)8]·CH3OH·H2O (M = Mo, 1; W, 2). Single crystal X-ray diffraction analysis revealed that both compounds are isostructural and the structure consists of Sm3+ centers and [M(CN)8]3− units linked alternatively to generate a one-dimensional (1D) zigzag chain. The chains are further connected together through hydrogen-bonding and π-π stack interactions to form a 3D supramolecular network. The magnetic results revealed that the ferromagnetic interactions were observed between Sm(III) and M(V) centers in both compounds.