Crystal structure of a Co(II) coordination polymer: catena-poly[[μ-aqua-bis­(μ-2-methyl­propano­ato)-κ(2) O:O′;κ(2) O:O-cobalt(II)] monohydrate]

In the title cobalt(II) coordination polymer with isobutyrate ligands, {[Co{CH(CH(3))(2)CO(2)}(2)(H(2)O)]·H(2)O}(n), the Co(2+) ion is hexa­coordinated in a slightly distorted octa­hedral coordination environment defined by two O atoms from two bridging water mol­ecules and four O atoms from four bridging carboxyl­ate ligands. The carboxyl­ates adopt two different coordination modes, μ-(κ(2) O:O′) and μ-(κ(2) O:O), forming a one-dimensional polymeric chain extending along [010]. The intra-chain cobalt⋯cobalt separation is 3.2029 (2) Å. The polymeric chains are linked by hydrogen bonds involving the water mol­ecules of solvation, giving a two-dimensional network structure lying parallel to (100).