Crystal structure of catena-poly[[[di­aqua­bis­(2,4,6-tri­methyl­benzoato-κO)cobalt(II)]-μ-aqua-κ(2) O:O] dihydrate]

The asymmetric unit of the title one-dimensional polymeric compound, {[Co(C(10)H(11)O(2))(2)(H(2)O)(3)]·2H(2)O}(n), contains one Co(II) cation situated on a centre of inversion, one-half of a coordinating water mol­ecule, one 2,4,6-tri­methyl­benzoate (TMB) anion together with one coordinating and one non-coordinating water mol­ecule; the TMB anion acts as a monodentate ligand. In the anion, the carboxyl­ate group is twisted away from the attached benzene ring by 84.9 (2)°. The Co(II) atom is coordinated by two TMB anions and two water mol­ecules in the basal plane, while another water mol­ecule bridges the Co(II) atoms in the axial directions, forming polymeric chains running along [001]. The coordination environment for the Co(II) cation is a slightly distorted octa­hedron. The coordinating and bridging water mol­ecules link to the carboxyl­ate groups via intra- and inter­molecular O—H⋯O hydrogen bonds, enclosing S(6) ring motifs, while the coordinating, bridging and non-coordinating water mol­ecules link to the carboxyl­ate groups and the coordinating water mol­ecules link to the non-coordinating water mol­ecules via O—H⋯O hydrogen bonds, enclosing R (2) (2)(8) and R (3) (3)(8) ring motifs. Weak C—H⋯O and C—H⋯π inter­actions may further stabilize the crystal structure.