Synthesis and crystal structure of [Cu_2(C_8H_3NO_6)_2(C_(10)H_8N_2)_2(H_2O)_2]·2H_2O

Reaction of Cu(NO3)2·3H2O with 3-Nitrophthalic acid and 2,2'-Bipyridyl in EtOH/H2O solution gave a dinuclear complex [Cu2(C8H3NO6)2(C10H8N2)2(H2O)2]·2H2O(C8H3NO6=3-Nitrophthalate,C10H8N2=2,2'-Bipyridyl).The complex was characterized by elemental analysis,IR spectra,and single crystal X-ray diffraction analysis,which revealed that the title compound is triclinic in space group P-1 with crystal parameters of a=0.753 4(19)nm,b=1.046 7(3)nm,c=1.204 4(3)nm,α=87.835(2)°,β=74.911(3)°,γ=77.437(3)°,V=0.894 9(4)nm3,Z=1,Dc=1.725 g/cm3,μ=1.277 mm-1,F(000)=474,R=0.0382.The central copper cation is 5-coordinated in a square pyramidal coordination sphere with the five coordination donor atoms situated on the vertexes.Every two central-symmetrically related coordination units form a dimer as a Cu—O bond involved.The discrete molecules are connected to form a three-dimensional network by weak supramolecular interactions such as intermolecular hydrogen-bonds and π-π stacking,CCDC 621787.