Aqua-bis(4-nitro-benzoato)-κO,O';κO-(piperidinium-4-carboxyl-ato-κO,O')cadmium(II).

In the mixed ligand title compound, [Cd(C(6)H(11)NO(2))(C(7)H(4)NO(4))(2)(H(2)O)], which exhibits a discrete mononuclear structure, the Cd(II )atom is in a distorted octa-hedral geometry, surrounded by five carboxyl-ate O atoms and one coordinated water mol-ecule. The piperdinium ring adopts a chair conformation and the two 4-nitro-benzoate rings are oriented at a dihedral angle of 75.8 (1)°. Inter-molecular O-H⋯O and N-H⋯O hydrogen bonds link the mononuclear entities into a three-dimensional supra-molecular network.