Diaqua-(5-carb-oxy-benzene-1,3-dicarboxyl-ato-κO,O)(6,6'-dimethyl-2,2'-bipyridine-κN,N')nickel(II) hepta-hydrate.

In the title compound, [Ni(C(9)H(4)O(6))(C(12)H(12)N(2))(H(2)O)(2)]·7H(2)O, the Ni(II) atom is six-coordinated by two O atoms from a chelating carboxyl-ate group of a 5-carb-oxy-benzene-1,3-dicarboxyl-ate ligand, two O atoms of two water mol-ecules and two N atoms from a 6,6'-dimethyl-2,2'-bipyridine ligand in a distorted octa-hedral geometry. The compound exhibits a three-dimensional supra-molecular structure composed of the complex mol-ecules and lattice water mol-ecules, which are linked together by inter-molecular O-H⋯O hydrogen bonds and partly overlapping π-π inter-actions between the pyridine and benzene rings [centroid-centroid distances = 3.922 (2) and 3.921 (2) Å]. One of the lattice water mol-ecules is disordered over two positions in an occupancy ratio of 0.521 (6):0.479 (6).

Poly[[hexa-aqua-bis-(µ(3)-benzene-1,3,5-tricarboxyl-ato-κO:O:O)bis-(5,5'-dimethyl-2,2'-bipyridine-κN,N')trizinc] hexa-hydrate].

In the title compound, {[Zn(3)(C(9)H(3)O(6))(2)(C(12)H(12)N(2))(2)(H(2)O)(6)]·6H(2)O}(n), one Zn(II) atom, lying on an inversion center, is six-coordinated by two O atoms from two benzene-1,3,5-tricarboxyl-ate (btc) ligands and four water mol-ecules in a distorted octa-hedral geometry. The other Zn(II) atom is five-coordinated by two N atoms from a 5,5'-dimethyl-2,2'-bipyridine (dmbpy) ligand, two O atoms from two btc ligands and one water mol-ecule in a distorted trigonal-bipyramidal geometry. The compound features a one-dimensional ladder structure, with windows of ca 10.245 (1) × 15.446 (2) Å. The ladders are linked together by inter-molecular O-H⋯O hydrogen bonds and π-π inter-actions between the benzene rings and between the pyridine rings [centroid-to-centroid distances 3.858 (2) and 3.911 (3) Å, respectively] to form a three-dimensional supra-molecular structure. One of the lattice water molecules is disordered over two positions in a 0.592:0.408 ratio.

catena-Poly[[aqua-(5,5'-dimethyl-2,2'-bipyridine-κN,N')copper(II)]-µ-2,2'-oxydibenzoato-κO:O'].

In the title compound, [Cu(C(14)H(8)O(5))(C(12)H(12)N(2))(H(2)O)](n), the Cu(II) ion is penta-coordinated in a square-pyramidal geometry. Two N atoms of the chelating 5,5'-dimethyl-2,2'-bipyridine (dbp) ligand and two O atoms of two different 2,2'-oxydibenzoic (odb) ligands occupy the basal plane while the water O atom completes the square-pyramidal geometry at the apical site. The non-water N(2)O(2) donor atoms are nearly coplanar, with a mean deviation from the least-squares plane of 0.0518 (11) Šand the Cu atom is displaced by 0.1507 (11) Šfrom this plane towards the apical water O atom. Further coordination via the 2,2'-oxydibenzoate anions forms a one-dimensional coordination polymer extending parallel to [010]. In the crystal structure, O-H⋯O hydrogen bonds link the mol-ecules into a two-dimensional supra-molecular structure.