The synthesis, structure, and magnetic properties of [Cu(5-NO2-2-HOPy)(pz)2(H2O)] (ClO4)2∙H2O (pz = pyrazine) (1) are reported. Crystals were characterized using IR, combustion analysis, X-ray powder diffraction, single crystal X-ray diffraction, and temperature-dependent magnetic susceptibility measurements. Compound 1 crystallizes in the monoclinic space group P21/c. The crystal structure consists of copper/pyrazine chains parallel to the c-axis with terminal pyrazine groups found perpendicular to the bridging pyrazine molecules creating a zig-zag chain structure. The 1D-system exhibits weak antiferromagnetic interactions of J = -7.58 K with no measurable interchain interactions.