Synthesis and Crystal Structures of Copper Complex with the Bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxyllic Acid

Complex [Cu2L2(H2O)2]n(2)(H4L=bicyclooct-7-ene-2,3,5,6-tetracarboxyllic acid),has been synthe-sized under hydrothermal condition and characterized by elemental analysis,IR spectra,powder X-ray diffraction and single-crystal X-ray analysis.Single crystal of compound H4L·2H2O(1) was also obtained under the hydrothermal condition.Crystal data for 1:C12H16O10,triclinic,space group P1.a=0.885 54(15) nm,b=0.955 66(16) nm,c=1.043 88(17) nm,α=110.863(3)°,β=91.127(3)°,γ=91.429(3)°,V=0.824 9(2) nm3,Z=2,Mr=320.25,Dc=1.289 g·cm-3,F(000)=336,μ=0.115,the final R=0.064 8 and wR2=0.180 2 for observed reflections 1 940 with I2σ(I).Crystal data for 2:C6H6CuO5,Orthorhombic,space group Pnnm.a=2.766 8(6) nm,b=0.638 75(14) nm,c=0.737 32(16) nm,V=1.303 1(5) nm3,Z=4,Mr=442.31,Dc=2.254 g·cm-3,F(000)=884,μ=3.324,the final R=0.059 4 and wR=0.191 7 for observed reflections 1 247 with I2σ(I).The structural analysis show that the complex 1 is zero-dimensional structures and hydrogen bonds result in three-dimensional supramolecular structures.The complex 2 is a three-dimensional network structures.