Poly[triaquatris(μ₄-pyridine-3,5-dicarboxylato)dicerium(III)]

Abstract

The asymmetric unit of the title compound, [Ce2(C7H3NO4)3(H2O)3]n, contains two CeIII cations, three pyridine-3,5-dicarboxyl­ate (pyd) anions and three coordinated water mol­ecules. One CeIII cation is coordinated by seven carboxyl­ate O atoms from six pyd anions and two water mol­ecules in a square-face-capped square-anti­prismatic geometry. Another CeIII cation is coordinated by seven O atoms from six pdy anions and one water mol­ecule in a bicapped trigonal–prismatic geometry. The pdy anions bridge the CeIII cations, forming the three-dimensional polymeric structure. The crystal structure contains extensive O—H⋯O, O—H⋯N and weak C—H⋯O hydrogen bonds. π–π stacking is present in the crystal structure, the shortest centroid–centroid distance between parallel pyridine rings being 3.509 (4) Å.