Poly[[diaqua-[μ(2)-3-carb-oxy-5-(pyridine-4-carboxamido)-benzoato][μ(4)-5-(pyridine-4-carboxamido)-isophthalato]cerium(III)] monohydrate].

In the title compound, {[Ce(C(14)H(9)N(2)O(5))(C(14)H(8)N(2)O(5))(H(2)O)(2)]·H(2)O}(n), three carboxyl groups of two independent isophthalate anions are deprotonated and they bridge the Ce(III) cations, forming a two-dimensional polymeric structure parallel to (001); another carboxyl group is not deprotonated and links with the adjacent pyridine ring via an O-H⋯N hydrogen bond. The Ce(III) cation is coordinated by six O atoms from carboxyl groups and two O atoms from coordinated water mol-ecules in a distorted square-anti-prismatic arrangement. Extensive O-H⋯O and O-H⋯N hydrogen bonding occurs in the crystal structure.