title: Crystal structure of tetraaquabis(8-chloro-9,10-dioxo-9,10-dihydroanthracene-1-carboxyl-ato-κO (1))cobalt(II) dihydrate.
abstract: 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-anthra-quinone-1-carboxyl-ate anions and four water O atoms in a trans conformation, forming an irregular octa-hedral coordination geometry. This arrangement is stabilized by intra-molecular O-H⋯O hydrogen bonds between water and carboxyl-ate. Further O-H⋯O hydrogen bonds between coordinating and non-coordinating water and carboxyl-ate produce layers of mol-ecules that extend parallel to (001). The organic ligands project above and below the plane. Those ligands of adjacent planes are inter-digitated and there are π-π inter-actions between them with centroid-centroid distances of 3.552 (2) and 3.767 (2) Å that generate a three-dimensional supra-molecular structure.
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Cai
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Liu
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Feng-Yi
authors.initials: FY
authors.lastname: Liu
authors.affiliation: College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, People's Republic of China.
authors.forename: Jun-Feng
authors.initials: JF
authors.lastname: Kou
keywords: anti­tumor; cobalt; crystal structure; hydrogen bond