The cover shows a new silicide K₂BaSi₄, which may be considered a hierarchical homologous of the sodium thallide reported by Eduard Zintl (Angewandte Chemie 52(1939)1). The comparison of conceptual results with the quantum chemical analysis of chemical bonding in position space (ELI-D) reveals charge transfer from cations to silicon; the number of the ELI-D attractors in the valence region around the Si₄^4– anion agreeing with the expectations from the Zintl concept; the populations of the bond and ‘lone-pair’ basins agreeing with the Zintl count for molecular species H₄Si₄ and deviating for K₂BaSi₄ solid; the sensitivity of the topology of the ELI-D toward the geometry of the Si₄⁴⁻ anion (DOI: 10.1002/zaac.202300116).

中文翻译：

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封面：K2BaSi4：位置空间中的 Zintl 概念 (Z. Anorg. Allg. Chem. 19/2023)

封面显示了一种新的硅化物 K ₂ BaSi ₄，它可以被认为是 Eduard Zintl (Angewandte Chemie 52(1939)1) 报道的卤化钠的分级同系物。概念结果与位置空间化学键的量子化学分析 (ELI-D) 的比较揭示了电荷从阳离子到硅的转移；_{Si 4} ^4-阴离子周围价电子区中 ELI-D 吸引子的数量与 Zintl 概念的预期一致；键和“孤对”盆地的数量与分子种类 H ₄ Si ₄的 Zintl 计数一致，但与 K ₂ BaSi _4的偏差坚硬的; ELI-D 的拓扑结构对 Si ₄ ⁴⁻阴离子几何结构的敏感性 (DOI: 10.1002/zaac.202300116)。