Bis(pyrimidine-2-carboxyl­ato-κ ² N, O)copper(II)

Abstract

The title compound, [Cu(C ₅H ₃N ₂O ₂) ₂], was prepared in a water–ethanol solution containing 2-cyano­pyrimidine, malonic acid and copper(II) nitrate trihydrate. The Cu ^II ion, located on an inversion center, is chelated by two pyrimidine-2-carboxyl­ate anions in a CuO ₂N ₂ square-planar geometry. The uncoordinated carboxyl­ate O atom and pyrimidine N atoms are linked to adjacent pyrimidine rings via weak C—H⋯O and C—H⋯N hydrogen bonding. π–π Stacking is observed between nearly parallel pyrimidine rings, the centroid-to-centroid separation being 3.8605 (13) Å.