Figure 2
A view of the asymmetric unit, extended to complete the coordination sphere around Pb2 and Pb3, and showing the distorted N3O4 coordination at each metal centre. The unlabelled N atoms (shown as blue circles in the electronic version of the paper) are shaded bottom left to top right. Atoms whose labels include the suffixes `A' and `B' are related to their unsuffixed equivalents by the symmetry operations (1 − x, y, − z) and (−x, 1 − y, −z), respectively. |