Ψ-Polyhedral symbols for coordination geometries of lead(II) with a stereochemically active lone pair.

Because an IUCr/IUPAC-designated set of letters/numbers identifies the con­figuration of the atoms linked to the PbII atom in its coordination com­pounds, a Ψ prefix before such as a polyhedral symbol provides useful information when its lone pair is stereochemically active. Such notation is especially relevant when the metal atom is connected to eight or more atoms regardless of whether the lone pair is active or inert. The polyhedral symbols for the crystal structures in some 50 articles published after 2000 are reported here as the original studies did not expressly identify coordination geometries.