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 P2(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 inter­action. [Image: see text]