Hydrothermal Synthesis and Crystal Structure of a New One-dimensional Cobalt(Ⅱ) Complex with 2-Pyridinecarboxyic Acid and 4,4′-Bipyridine Ligands

A new metal-organic coordination polymer [Co(2-pya)2(4,4'-bipy)]2n·[(4,4'-bipy)0.5· H2O]2n(2-pya = 2-pyridinecarboxylic acid,4,4'-bipy = 4,4'-bipyridine) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,TG and single-crystal X-ray diffraction.The complex crystallizes in tetragonal,space group I41/a with a = b = 22.719(2),c = 10.710(2) ,V = 5527.8(14) 3,C54H46N10Co2O10,Mr = 1112.87,Dc = 1.337 g/cm3,μ(MoKα) = 0.665 mm-1,F(000) = 2296,Z = 4,the final R = 0.0633 and wR = 0.1096 for 1261 observed reflections(I > 2σ(I)).It exhibits a one-dimensional chain-like structure constructed by mixed ligands of 2-pyridinedicarboxylic acid and 4,4'-bipyridine.