Crystal structure of catena-poly[calcium-di-μ(3)-benzoato-κ(6) O,O′:O-μ(2)-(dimethyl sulfoxide)-κ(2) O:O]

In the title complex, [Ca(C(7)H(5)O(2))(2)(C(2)H(6)OS)](n), the Ca(2+) ion (site symmetry m..) is surrounded by eight O atoms, six from two bridging–chelating tridentate benzoate carboxyl groups and two from a bridging dimethyl sulfoxide mol­ecule (point group symmetry m..), giving an irregular coordination geometry [Ca—O bond length range = 2.345 (2)–2.524 (2) Å]. One-dimensional coordination complex chains extending parallel to c are generated in which the triply μ(2)-O-bridged Ca(2+) cations are separated by 3.6401 (5) Å. In the crystal, weak intra­chain C—H⋯π hydrogen bonds are present between the methyl H atoms of the dimethyl sulfoxide mol­ecules as donors and the aromatic rings as acceptors [C—H⋯Cg = 3.790 (4) Å].