A one-dimensional coordination polymer [Cu(2-pac)(2)center dot 2H(2)O](n) (1) (2-pac=2-pyrazinecarboxylic acid) has been synthesized and structurally characterized by single crystal structure determination method. Crystal data: triclinic, space group P1, a=0.5173(5) nm, b=0.7699(1) nm, c=0.9294(1) nm, alpha=74.832(1)degrees, beta=84.234(2)degrees, gamma= 71.288(1)degrees, V=0.338 3(3) nm(3) Z=1, S=1.037, Final R indices (I > 2 sigma(1) R-1=0.0721, wR(2)=0.1678, for all reflections R-1=0.093 0, wR(2) = 0.187 2. In addition, elemental analysis, IR and thermalgravimetric analysis are presented.