Mixed Solvothermal Synthesis and Characterization of Two Copper Coordination Polymers:Cu_3(2,2'-bipy)_2(C_8H_4O_4)_2(C_8H_5O_4)_2 and Cu(I)Cu(II)(4,4'-bipy)_(1.5)(C_8H4_O_4)(C_8H_5O_4)

Two copper coordination polymers,Cu3(2,2'-bipy)2(C8H4O4)2(C8H5O4)2(1)and Cu(Ⅰ)Cu(Ⅱ)(4,4'-bipy)1.5(C8H4O4)(C8H5O4)were hydrothermally synthesized in mixed solvothermal and characterized by single crystal X-ray diffraction.Cu3(2,2'-bipy)2(C8H4O4)2(C8H5O4)2(1)crystallizes in a triclinic system with space group P1 and cell parameters,a=1.03314(4)nm,b=1.08350(3)nm,c=1.15826(4)nm,α=83.104(2)°,β=84.609(2)°,γ=66.125(2)°,and Z=1.Cu(Ⅰ)Cu(Ⅱ)\5(4,4'-bipy)1.5(C8H4O4)(C8H5O4)(2)crystallizes also in a triclinic system with space group P1 and cell parameters,a=1.06979(3)nm,b=1.09209(3)nm,c=1.47887(3)nm,α=91.795(2)°,β=93.2460(10)°,γ=118.6170(10)°,and Z=2.Their syntheses were performed under the similar conditions from different organic alkali ligands 2,2'-bipy and 4,4'-bipy at different concentrations.These changes gave rise to the corresponding change in final crystal structure of products.Both compounds are thermally stable up to 300 ℃.