Abstract. With the attempt to synthesize Nb‐enclosed germanium Zintl cluster ion in ethylenediamine (en) / toluene solution, the reaction of K₄Ge₉/Na₄Ge₉ with Nb(mes)₂ (mes = mesitylene) gives unexpected 18‐crown‐6 cleavage product of [K₁₄Na₂(NbO₂)₂(C₈H₁₆O₅)₈](Ge₅) (en)·solv in the form of very air‐sensitive, light‐brown, plate‐like crystals. This unique compound crystallizes in monoclinic Pn (No. 7) space group, the cleavage of crown linked the 14 potassium, 2 sodium, and 2 niobium atoms into the bulky 2+ charged cation, which balances the [Ge₅]^2– anion. This compound represents the rare example of heteronuclear metal alkoxide / Zintl ion hybrid.

中文翻译：

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对于5个原子[Ge5] 2–簇，异常大的254个原子反离子

摘要。为了在乙二胺（en）/甲苯溶液中合成Nb封闭的锗Zintl簇离子，K ₄ Ge ₉ / Na ₄ Ge ₉与Nb（mes）₂（mes =均三甲苯）的反应产生了意想不到的18冠[K ₁₄ Na ₂（NbO ₂）₂（C ₈ H ₁₆ O ₅）₈ ]（Ge ₅）（en）·溶剂的6裂解产物以对空气敏感的浅棕色板状晶体的形式出现。这种独特的化合物在单斜晶Pn（第7号）空间群中结晶，冠的裂解将14个钾，2个钠和2个铌原子连接到庞大的2+带电阳离子中，从而平衡了[Ge ₅ ] ^2–阴离子。该化合物代表稀核金属醇盐/ Zintl离子杂化物的罕见例子。