Synthesis, characterization and magnetic properties of cyanide bridged 1-D metal-coordination polymers based on [FeIII(s-bqdi)2(CN)2]−

A new series of transition metal complexes K[MII(s-bqdi)2][FeIII(s-bqdi)2(CN)2] · 10H2O (s-bqdi = semibenzoquinonediiminate, MII = Co (2), Ni (3), and Cu (4)) have been synthesized. These complexes have been characterized by elemental analyses, FT IR, Far IR, FAB mass, UV-Vis, TGA, CV measurements, and powder XRD. The powder XRD patterns of 2, 3, and 4 show that they are isostructural with hexagonal primitive lattice structures. The coordination polymers display 1-D chain networks. Magnetic properties of the CoIIFeIII complex studied by a SQUID magnetometer reveal low-temperature antiferromagnetic interaction.