Bis[[aqua­(1H-imidazo[4,5-f][1,10]phenanthroline-κ²N⁶,N⁷)cadmium]bis­(μ-pyridine-2,3-dicarboxyl­ato)-κ³N,O²:O³;κ³O³:N,O²]

In the title compound, [Cd₂(C₇H₃NO₄)₂(C₁₃H₈N₄)₂(H₂O)₂], the Cd^II ion is six-coordinated by two N atoms from a 1H-imidazo[4,5-f][1,10]phenanthroline (IP) ligand, one N atom and one O atom from a pyridine-2,3-dicarboxyl­ate (pdc) ligand, one O atom from another pdc ligand and one water mol­ecule in a distorted octa­hedral geometry. Two Cd^II ions are bridged by a pair of pdc ligands, forming a centrosymmetric dinuclear structure. Neighboring dinuclear units are linked by the coordinated water mol­ecules through O—H...N and O—H...O hydrogen bonds, forming a layer parallel to (011). The layers are further linked into a three-dimensional network through N—H...O hydrogen bonds. π–π inter­actions between the IP ligands further stabilize the supra­molecular structure [centroid–centroid distances = 3.579 (3), 3.686 (3), 3.710 (3), 3.766 (3) and 3.841 (3) Å].

2,6-Bis(1H-benzimidazol-2-yl)pyridine butyric acid monosolvate dihydrate

In the title compound, C₁₉H₁₃N₅·C₄H₈O₂·2H₂O, the mol­ecular skeleton of the 2,6-bis­(benzimidazol-2-yl)pyridine (bbip) mol­ecule is essentially planar (r.m.s. deviation = 0.023 Å). An extensive three-dimensional network of inter­molecular N—H...O, O—H...O and O—H...N hydrogen bonds consolidates the crystal packing, which also exhibits π–π inter­actions between the five- and six-membered rings from neighbouring bbip mol­ecules.

Adipic acid–2,6-bis­(1H-benzimidazol-2-yl)pyridine–water (1/2/4)

The asymmetric unit of the title hydrated co-crystal, 2C₁₉H₁₃N₅·C₆H₁₀O₄·4H₂O, consists of one 2,6-bis­(1H-benzimidazol-2-yl)pyridine mol­ecule, half of an adipic acid mol­ecule (bis­ected by an inversion center) and two water solvates. In the crystal, N—H...O, O—H...O and O—H...N hydrogen bonds and π–π inter­actions [centroid–centroid distances = 3.769 (2) and 3.731 (2) Å] form a three-dimensional supra­molecular structure.