Rerefinement of poly[di-aqua-bis-(μ(3)-2-methyl-pro-pano-ato-κ(4) O:O,O':O')bis-(μ(3)-2-methyl-propano-ato-κ(3) O:O:O)(μ(2)-2-methyl-propano-ato-κ(3) O:O,O')(2-methyl-propano-ato-κ(2) O,O')trilead(II)].

The crystal structure of the title complex, [Pb(3)(C(4)H(7)O(2))(6)(H(2)O)(2)] (n) , was redetermined on basis of modern CCD-based single-crystal X-ray data at 120†K. The current study basically confirms the previous report [Fallon et al. (1997 ▸). Polyhedron, 16, 19-23] at 190†K, but with higher accuracy and precision. In particular, positional disorder of one of the 2-methyl-propano-ate anions over two sets of sites was resolved, showing a refined ratio of the disorder components of 0.535†(9):0.465†(9). The three independent cations in the structure have coordination numbers of [7 + 1], [6 + 1], and [5 + 3], with O atoms belonging either to carboxyl-ate groups or water mol-ecules. This arrangement leads to the formation of sheets parallel to (01), whereby the hydro-phobic 2-methyl-propanyl groups of the anions are oriented above and below the hydro-philic sheets to form a layered structure. Within a sheet, hydrogen bonds of the type O(water)-H⋯O are formed, whereas the hydro-phobic groups between adjacent layers inter-act through van der Waals forces.