Redetermination ofcatena-poly[diaqua(oxydiacetato-O,O′,O′′)cobalt(II) monohydrate

Abstract

The structure of the title compound, catena-poly­[[[di­aqua­cobalt(II)]-μ-oxy­diacetato-κ4O,O′,O′′:O′′′)­cobalt(II)] monohydrate], {[Co(C4H4O5)(H2O)2]·H2O}n, (I), was first de­ter­min­ed and reported by Hatfield et al. [Proc. Indian Acad. Sci. Chem. Sci. (1987), 98, 23–31]. We present here a redetermination, with appreciably improved accuracy and successful location of H atoms. In the crystal structure, oxydi­acetate plays the role of both chelating and bridging ligand, resulting in he formation of polymeric chains of complex mol­ecules along the crystallographic b axis. Water mol­ecules occupy the apical positions, thus completing the coordination octahedron of the CoII atom. The polymeric chains are interlinked via intermolecular hydrogen bonding between carboxyl­ate and water mol­ecules, forming the three-dimensional supramolecular structure.