A second polymorph ofcatena-poly[[(1,10-phenanthroline-κ2N,N′)copper(II)]-di-μ-thiocyanato-κ2N:S;κ2S:N]

In the title coordination polymer, [Cu(NCS)2(C12H8N2)]n, the CuII atom is situated on a twofold rotation axis and is coordinated by two N atoms from the bidentate 1,10-phenanthroline ligand and four thio­cyanate groups to confer a CuN4S2 octa­hedral geometry and resulting in a layer structure extending parallel to (100).