A Free Cyclotrigermenium Cation with a 2π-Electron System
A Free Cyclotrigermenium Cation with a 2π-Electron System
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DOI：
10.1126/science.275.5296.60
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发表时间：
1997-01
期刊：
影响因子：
56.9
通讯作者：
A. Sekiguchi;Masanori Tsukamoto;M. Ichinohe
中科院分区：
文献类型：
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作者：
A. Sekiguchi;Masanori Tsukamoto;M. Ichinohe
四（三叔丁基硅基）环三锗烯与四苯基硼酸三苯甲基酯在苯中反应生成三（三叔丁基硅基）环三锗四苯基硼酸盐[（tert-Bu 3SiGe）3+ BPh 4 −]，其可以分离为黄色固体，在没有空气的情况下稳定。环三锗鎓离子的晶体结构揭示了具有2π电子系统的自由锗基阳离子。三个锗原子形成一个等边三角形，类似于碳类似物环丙烯离子。
The reaction of tetrakis(tri-tert-butylsilyl)cyclotrigermene with trityl tetraphenylborate in benzene produces tris(tri-tert-butylsilyl)cyclotrigermenium tetraphenylborate [(tert-Bu3SiGe)3+BPh4−], which can be isolated as a yellow solid that is stable in the absence of air. The crystal structure of the cyclotrigermenium ion reveals a free germyl cation with a 2π-electron system. The three germanium atoms form an equilateral triangle similar to the carbon analog, the cyclopropenium ion.