Poly[[tetra-aqua-bis-(μ(3)-5-carboxybenzene-1,2,4-tri-carboxyl-ato)tricadmium] tetra-hydrate].

There are three independent Cd(II) ions in the title complex, {[Cd(3)(C(10)H(3)O(8))(2)(H(2)O)(4)]·4H(2)O}(n), one of which is coordinated by four O atoms from three 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by two water mol-ecules in a distorted octa-hedral geometry. The second Cd(II) ion is coordinated by five O atoms from four 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by one water mol-ecule also in a distorted octa-hedral geometry while the third Cd(II) ion is coordinated by five O atoms from three 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands and by one water mol-ecule in a highly distorted octa-hedral geometry. The 5-carboxybenzene-1,2,4-tri-carboxyl-ate ligands bridge the Cd(II) ions, resulting in the formation of a three-dimensional structure.

Diaqua-bis-{1-[(1H-benzimidazol-2-yl)meth-yl]-1H-imidazole-κN(3)}dichlorido-cadmium hexa-hydrate.

In the title complex, [CdCl(2)(C(11)H(10)N(4))(2)(H(2)O)(2)]·6H(2)O, the Cd(II) atom is located on a twofold rotation axis and is coordinated by two N atoms from two 1-[(1H-benzimidazol-2-yl)meth-yl]-1H-imidazole ligands and two water O atoms in equatorial positions and by two Cl atoms in axial positions, leading to an elongated octa-hedral environment. The two coordinating and two of the lattice water mol-ecules are also located on twofold rotation axes. In the crystal, complex mol-ecules and solvent water mol-ecules are linked through a complex inter-molecular N-H⋯O, O-H⋯N, O-H⋯O and O-H⋯Cl hydrogen-bonding scheme into a three-dimensional network.