Crystal structure of a polymeric calcium levulinate dihydrate: catena-poly[[di-aqua-calcium]-bis-(μ2-4-oxo-butano-ato)].

In the title calcium levulinate complex, [Ca(C5H7O3)2(H2O)2] n , the Ca(2+) ion lies on a twofold rotation axis and is octa-coordinated by two aqua ligands and six O atoms from four symmetry-related carboxyl-ate ligands, giving a distorted square-anti-prismatic coordination stereochemistry [Ca-O bond-length range = 2.355 (1)-2.599 (1) Å].