A monoclinic polymorph of dichloro­bis(cyano­guanidine)zinc(II)

The mol­ecular title compound, β-[ZnCl₂(C₂H₄N₄)₂], crytallizes as a monoclinic polymorph of the known triclinic structure of this material. A complex network of N—H...N and N—H...Cl hydrogen bonds help to establish the crystal packing.