Synthesis and Crystal Structure of a 1-D Chain Coordination Complex {[Mn2（HCAM）3（H2bipy）]·5H2O}n

The 1-D chain coordination complex of {Mn2（HCAM）3（H2bipy）]·5H2O}n （H3CAM = 4-hydroxypyridine-2,6-dicarboxylic acid, bipy = 4,4＇-bipyridine） has been synthesized by the reaction of 4-hydroxypyridine-2,6-dicarboxylic acid, 4,4＇-bipyridine and manganese carbonate under hydrothermal conditions, and its crystal structure was determined by X-ray diffraction method The crystal belongs to the monoclinic system, space group P21/n with a = 10.110（2）, b = 20.159（4）, c = 17.861（4）A,β = 99.67（3）°, V = 3.5884（12） nm3, Mr= 901.47, Z = 4, Dc= 1.669 g.cm^-3, μ= 0.798 mm^-1, F（000） = 1840, the final R = 0.0713 and ωR = 0.1853. The complex forms a 1-D chain bridged by HCAM, protonated 4,4-bipyridines link the 1-D chains to construct 2-D networks via N-H...O hydrogen bonds, and networks are further extended via π-π stacking and hydrogen bonds into 3-D supramolecular framework.