Two new 1D slide-fastener-like coordination polymers {[Mn2 (pztc)(phen) 2 (H2O) 2]· 4H2O} n (1) and {[Mn2 (pztc)(bpy) 2 (H2O) 2]· 2H2O} n (2) have been synthesized by the reactions of pyrazine-2, 3, 5, 6-tetracarboxylic acid (pztcH4) and Mn (OAc) 2· 4H2O in the presence of 1, 10-phenanthroline (phen) or 2, 2′-bipyridine (bpy) under hydrothermal conditions and characterized by elemental analyses, FT-IR, TGA and X-ray diffraction. In complex 1 and 2 ...