Heteroatomic Si/Ge Zintl Clusters: Single-Crystal Structure Determination of Rb₄[Si_7.8Ge_1.2](NH₃)₅ and [Rb([18]crown-6)Rb₃][Si_7.5Ge_1.5](NH₃)₄

摘要

Towards silicon microelectronics: Dissolution of the heteroatomic Group 14 element Zintl phase Rb₁₂Si₁₂Ge₅ in liquid ammonia led to the isolation of two [E₉]4− clusters with Si and Ge mixed site occupation. The existence of [Si_7.5(1)Ge_1.5(1)]4− and [Si_7.8(1)Ge_1.2(1)]4− as soluble ions opens new synthetic routes for mixed metal semiconductors (see figure).