Synthesis,Crystal Structure and Magnetic Behavior of a Two-dimensional Cobalt(II)Complex with Benzene-l,4-dinitro-2,3,5,6-tetracarboxylate Tetravalent Anion as Bridging Ligand

摘要

Much research interest has been focused on the crystal engineering of coordination compounds that may provide new materials with useful properties such as catalytic,microporosity,electrical conductivity,non-linear optical activity and cooperative magnetic behavior.Benzene polycarboxylate anions such as terephthalate[1-7],phthalate[8-11],benzene-1,3,5-tricarboxylate[12-15],benzene-1,2,4,5-tetra-carboxylate[16-19]and mellitic anion[20-23]belong to versatile bridging ligands and many multi-nuclear complexes have been synthesized and some of them display interesting characteristics as regards magnetic properties[5,8,10]and structural feature[6,13].In this polycarboxylate ligands area,no complexes with benzene-1,4-dinitro-2,3,5,6-tetracarboxylate tetravalent anion(BDT)as bridging ligand have been described and in view of the interest in its novel coordinate function we prepared the title complex and here we report its synthesis,crystal structure and magnetic behavior.