Bis(μ-3-nitro­benzene-1,2-dicarboxyl­ato)-κ(4) O (1),O (2):O (1),O (1′);κ(4) O (1),O (1′):O (1),O (2)-bis­[triaqua­(6-carb­oxy-2-nitro­benzoato-κ(2) O (1),O (6))neodymium(III)] dihydrate

The title complex, [Nd(2)(C(8)H(3)NO(6))(2)(C(8)H(4)NO(6))(2)(H(2)O)(6)]·2H(2)O, consists of dimeric units related by an inversion center. The Nd(III) atom is nine-coordinated by three O atoms from water mol­ecules and six from carboxyl­ate atoms. The 1,2-dicarboxylate acid molecules are in a single and double deprotonation stage and exhibit two coord­in­ation modes, viz. μ(2)-(κ(4), O (1): O (2): O (2): O (3)) and μ(1)-(κ(2), O (2): O (3)), which are responsible for the dimeric structure framework. The dimeric structure is then assembled into a three-dimensional supramolecular framework via O—H⋯O hydrogen bonds.