The ligands N, N′-bis (3-pyridinecarboxamide)-1, 2-ethane (L) was designed to form coordination polymers capable of assembling into 2-D network via complementary amide hydrogen bonds. The reactions of L with AgX (X= ClO4−, CF3SO3− or NO3−), Zn (ClO4) 2· 6H2O and Cd (ClO4) 2· 6H2O produced coordination polymers 1–5, the structures of which were characterized by single crystal X-ray diffraction. The polymer {[AgL][ClO4]}∞ ...