Dipotassium aquabis(pyrazine‐2,3‐dicarboxylato‐κ2N,O)cuprate(II) hexahydrate

The crystal structure of the title compound, K2[Cu(C6H2N2O4)2(H2O)]·6H2O, consists of mononuclear [Cu(pzdc)2­(H2O)]2− complex anions (pzdc is pyrazine‐2,3‐di­carboxyl­ate), K+ cations and water mol­ecules, held together by means of K—O/OW bonds and an extended OW—H⋯O/OW and OW—H⋯N hydrogen‐bond network. The distorted square‐pyramidal coordination of the Cu atom is achieved by two N and two O donor atoms from two bidentate pzdc ligands in the basal plane, while a water mol­ecule occupies the apical position with a longer metal–O distance.