Poly[di­methyl­ammonium [(μ₂-benzene-1,2-di­carboxyl­ato-κ²O¹:O³)[μ₂-3-(pyri­din-4-yl)-1H-pyrazol-1-ido-κ²N¹:N³]cuprate(II)]]

In the title complex, {(C₂H₈N)[Cu(C₈H₄O₄)(C₈H₆N₃)]}_n, there are two Cu^II cations (each located on a centre of inversion), one benzene-1,2-di­carboxyl­ate dianion, one 3-(pyridin-4-yl)-1H-pyrazol-1-ide anion and one di­methyl­ammonium cation in the asymmetric unit. The di­methyl­ammonium cation was highly disordered and was treated with the SQUEEZE routine in PLATON [Spek (2009). Acta Cryst. D65, 148–155]; the crystallographic data takes into account the presence of the cation. Each Cu^II cation exhibits a square-planar coordination geometry. A benzene-1,2-di­carboxyl­ate dianion bridges two Cu^II cations, building a linear chain along [001]. The chains are connected by 3-(pyridin-4-yl)-1H-pyrazol-1-ide anions, constructing a layer parallel to (101). The layers are assembled into a three-dimensional supra­molecular network through C—H...π inter­actions.