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

In the title complex, [Co(C(15)H(6)ClO(4))(2)(H(2)O)(4)]·2H(2)O, 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.