Coordination between lead and oxydiacetic acid

In tetralead(II) trisoxydiacetatedinitrate-water(1/1) there are three crystallographically independent lead atoms which are seven-. eight- and nine-coordinated, respectively, by oxydiacetate. water and nitrate oxygen atoms. For the seven- and eight-coordinated lead atoms. the position of the lone pair can be predicted from the coordination geometry, with lead-oxygen distances in the range 2.464(13)-2.890(13) Angstrom. The lone pair of the nine-coordinated lead atom is inactive, with Pb-O distances in the range 2.593(14)-2.769(14) Angstrom. The coordination polyhedron for the seven-, eight- and nine-coordinated lead atoms is described as part of a cubeoctahedron, a rectangular antiprism and a monocapped rectangular antiprism, respectively. The oxydiacetate ions are almost planar. The lead atoms are connected by nitrate and oxydiacetate to form a three-dimensional network.