Crystal structure of tetraaquabis(8-chloro-9,10-dioxo-9,10-dihydroanthracene-1-carboxyl­ato-κO¹)cobalt(II) dihydrate

In the title complex, [Co(C₁₅H₆ClO₄)₂(H₂O)₄]·2H₂O, the Co^II ion is bound by two carboxylate O atoms of two 5-chloro-9,10-anthra­quinone-1-carboxyl­ate anions and four water O atoms in a trans conformation, forming an irregular octa­hedral coordination geometry. This arrangement is stabilized by intra­molecular O—H...O hydrogen bonds between water and carboxyl­ate. Further O—H...O hydrogen bonds between coordinating and non-coordinating water and carboxyl­ate produce layers of mol­ecules that extend parallel to (001). The organic ligands project above and below the plane. Those ligands of adjacent planes are inter­digitated and there are π–π inter­actions between them with centroid–centroid distances of 3.552 (2) and 3.767 (2) Å that generate a three-dimensional supra­molecular structure.

Crystal structure of 4-acetamido­benzoic acid monohydrate

In the title compound, C₉H₉NO₃·H₂O, the plane of the acetamide group is oriented at 20.52 (8)° with respect to the benzene ring, whereas the plane of the carb­oxy­lic acid group is essentially coplanar with the benzene ring [maximum deviation = 0.033 (1) Å]. In the crystal, classical O—H...O and N—H...O hydrogen bonds and weak C—H...O hydrogen bonds link the organic mol­ecules and water mol­ecules of crystallization into a three-dimensional supra­molecular architecture.