Because an IUCr/IUPAC-designated set of letters/numbers identifies the configuration of the atoms linked to the Pb^II 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.

中文翻译：

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具有立体化学活性孤对的铅（II）配位几何的Ψ-多面体符号

由于 IUCr/IUPAC 指定的一组字母/数字标识了与其配位化合物中连接到 Pb ^II原子的原子的构型，因此当其孤对具有立体化学活性时，多面体符号之前的 Ψ 前缀可提供有用的信息。当金属原子连接到八个或更多原子时，无论孤对是活性的还是惰性的，这种表示法尤其相关。此处报告了 2000 年后发表的大约 50 篇文章中晶体结构的多面体符号，因为原始研究没有明确确定配位几何。