At room temperature,a coordination polymer [Ni(btec)(H2O)4][Ni(imi)2(H2O)4]·2H2O was synthesized by reaction of NiCl2·6H2O,1,2,4,5-benzenetetracarboxylic dianhydride and imidazole in a water/THF solution.The structure was determined by X-ray diffraction crystal structure analysis.It crystallizes in triclinic P1 space group with the crystal cell parameters of a=0.675 42(2) nm,b=1.000 14(1) nm,c=1.090 88(3) nm,α=74.140(2)°,β=74.388(1)°,γ=73.239(2)°,and V=0.664 09(3) nm3,Z=1.The crystal structure shows that Ni1 atom is coordinated by four water and two imidazole molecules,while Ni2 is coordinated by four water molecules and two carboxyl oxygen atoms.The 1,2,4,5-benzenetetracarboxylate ions bridge Ni2 coordination centers to form one-dimensional chain structure.Moreover,the chains are further linked together by hydrogen bonds to form a two-dimensional network.
