Crystal structure of catena -poly[[[di-aqua-bis-(2,4,6-tri-methyl-benzoato-κ O )cobalt(II)]-μ-aqua-κ 2 O : O ] dihydrate].

The asymmetric unit of the title one-dimensional polymeric compound, {[Co(C10 H11 O2 )2 (H2 O)3 ]·2H2 O} n , contains one CoII cation situated on a centre of inversion, one-half of a coordinating water mol-ecule, one 2,4,6-tri-methyl-benzoate (TMB) anion together with one coordinating and one non-coordinating water mol-ecule; the TMB anion acts as a monodentate ligand. In the anion, the carboxyl-ate group is twisted away from the attached benzene ring by 84.9 (2)°. The CoII atom is coordinated by two TMB anions and two water mol-ecules in the basal plane, while another water mol-ecule bridges the CoII atoms in the axial directions, forming polymeric chains running along [001]. The coordination environment for the CoII cation is a slightly distorted octa-hedron. The coordinating and bridging water mol-ecules link to the carboxyl-ate groups via intra- and inter-molecular O-H⋯O hydrogen bonds, enclosing S (6) ring motifs, while the coordinating, bridging and non-coordinating water mol-ecules link to the carboxyl-ate groups and the coordinating water mol-ecules link to the non-coordinating water mol-ecules 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 inter-actions may further stabilize the crystal structure.