The core expansion of metallic or metalloid clusters by the addition of further homo- or heteronuclear vertices is pivotal to the nucleation and growth of particles. The exohedral grafting of a low-valent functionality followed by endohedral incorporation have been identified as key steps. Following previous work on the Si₆ series, we now report the synthesis and full characterization of the amidinatotetrylene-functionalized seven-vertex siliconoids Si₇R₅[E(N^tBu)₂CPh] (E = Si, Ge, Sn). In the case of the silylene derivative, the solid-state structure was determined by single crystal X-ray diffraction.

中文翻译：

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四萘嵌苯官能化 Si7-有机硅

通过添加更多同核或异核顶点而实现的金属或准金属簇的核心扩展对于颗粒的成核和生长至关重要。低价官能团的外接枝和内嵌合并被认为是关键步骤。继之前关于 Si _{6系列的工作之后，我们现在报告了脒四烯官能化七顶点硅化合物 Si 7} R ₅ [E(N ^t Bu) ₂ CPh]（E = Si、Ge、Sn）的合成和完整表征。对于亚硅基衍生物，通过单晶X射线衍射确定固态结构。