A copper（Ⅱ) complex Cu（L) 2(NO3)2 constructed by the L [(L=Thiazole)-N'-(ethoxycarbonyl) thiourea] ligand crystallizes in monoclinic，space group C2/c with a=19.645(7)，b=9.563(4)，c=16.028(9) A，β=127.224(5)o，V=2397.7(19) A3，Dc=1.795g·cm-3，Z=4，C14H16CuN8O10S4，Mr=648.13,μ(MoKα)=1.328mm-1，F(000)=1316，R=0.0626 and Wr=0.2066 for 2125 observed reflections（I>2δ(I)). X-raydiffraction shows the existence of weak complementary intramolecular N–H…O（DA) hydrogen bonds which further strengthen the coordination from the two L ligands with the Cu（Ⅱ) ion，weak π…π stacking interactions，leading to the formation of a multi-dimensional supramolecular network.
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