Tetrakis[μ-3-(3-hy­droxy­phen­yl)propenoato]bis­{aqua­(2,2′-bipyridine)­[3-(3-hy­droxy­phen­yl)propenoato]neodymium(III)} 2,2′-bipyridine disolvate dihydrate

The dinuclear title compound, [Nd(2)(C(9)H(7)O(3))(6)(C(10)H(8)N(2))(2)]·2C(10)H(8)N(2)·2H(2)O, was synthesized under hydro-thermal conditions. The centrosymmetric complex consists of two nine-coordinated Nd(3+) cations, six 3-hy-droxy-cinnamate anions and two chelating 2,2'-bipyridine mol-ecules. The coordination geometry around the cations can be best described as distorted tricapped trigonal-prismatic. The carboxyl-ate groups show different coordination and bridging modes. Two of them chelate to one Nd(3+) cation, two bridge the two cations in a bis-monodentate fashion, and two chelate to one and bridge monodentately to the symmetry-related Nd(3+) cation. The dinuclear mol-ecule is surrounded by two 2,2'-bipyridine solvent and two water mol-ecules. Extensive O-H⋯O and O-H⋯N hydrogen-bonding inter-actions between the components lead to the formation of a three-dimensional network.