Diaqua­bis­(nitrato-κ(2) O,O′)bis­(pyrazine-2-carboxamide-κN (4))cadmium–pyrazine-2-carboxamide (1/2)

In the title compound, [Cd(NO(3))(2)(C(5)H(5)N(3)O)(2)(H(2)O)(2)]·2C(5)H(5)N(3)O, the Cd(II) cation is located on a twofold rotation axis and is coordinated by two pyrazine-2-carboxamide ligands and two water mol­ecules and chelated by two nitrate anions in a distorted square-anti­prismatic geometry. Extensive inter­molecular N—H⋯O, N—H⋯N, O—H⋯O and O—H⋯N hydrogen bonds, as well as weak inter­molecular C—H⋯N and C—H⋯O inter­actions occur in the crystal. π–π stacking between between pyrazine rings of coordinating ligands and lattice molecules [centroid–centroid distance = 3.5669 (14) Å] may further stabilize the structure.