Abstract

In the title polymer, [Cd(C<inf>5</inf>H<inf>3</inf>N<inf>2</inf>O <inf>2</inf>)(NO<inf>3</inf>)(H<inf>2</inf>O)] n , the Cd^II atom is seven-coordinate in a distorted capped octahedral geometry by two N atoms of two different pyrimidine dicarboxylate (pmc) ligands, three O atoms from three separate pmc ligands, and two O atoms of disordered nitrate anions or water molecules. The Cd^II atoms are bridged by the pmc ligands in a chelating/bridging bis-bidentate and chelating bidentate mode, forming sheets parallel to (20-1). The sheets are further linked into a three-dimensional supramolecular network via classical O-H⋯O hydrogen bonds involving the nitrate anions and coordinating water molecules. Intramolecular O-H⋯O hydrogen bonding is also observed. The non-coordinating nitrate O atoms are disordered over two sets of sites with occupancies of 0.57(7) and 0.43(7).