catena -Poly[[bis-(quinolin-8-amine-κ 2 N , N ')cadmium(II)]-μ-cyanido-κ 2 N : C -[dicyanidonickel(II)]-μ-cyanido-κ 2 C : N ].

In the title compound, [CdNi(C 9 H 8 N 2 ) 2 (CN) 4 ] n , the Cd and Ni atoms both lie on centres of inversion in space group P 2 1 / c . The Cd atom is coordinated by two bidentate quinolin-8-amine ligands and by the N atoms of two cyano ligands, while the square planar Ni atom is coordinated by the C atoms of four cyano ligands. These units form a one-dimensional coordination polymer containing an (-NC-Ni-CN-Cd-) n backbone, and the coordination polymer chains are linked into a three-dimensional array by a combination of N-H⋯N and C-H⋯N hydrogen bonds, augmented by a π-π stacking inter-action.