Tetrakis(di-tert-butylmethylsilyl)distannene and its anion radical
Tetrakis(di-tert-butylmethylsilyl)distannene and its anion radical
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DOI：
10.1021/ja040152k
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发表时间：
2004-09-29
影响因子：
15
通讯作者：
Sekiguchi, A
中科院分区：
文献类型：
--
作者：
Fukawa, T;Lee, VY;Sekiguchi, A
在四氢呋喃（THF）中，tBu_2 MeCl_2与SnCl_2-diox反应，合成了四（二叔丁基甲基硅基）二锡烯1。X-射线衍射分析表明，1的SnSn双键是所有非环状二锡烯中最短的（2.6683（10）π），Sn原子周围几乎是平面的几何形状，以及高度扭曲的SnSn双键。二锡烯1与CCl 4反应生成1，2-二氯二锡烷2，这意味着无论在固态还是在溶液中，二锡烯1都不会解离成二锡烯。1与钾的单电子还原提供了相应的二锡烯阴离子自由基3，这是重烯烃类似物的稳定离子自由基，它已被X射线晶体学和ESR光谱充分表征。
Tetrakis(di-tert-butylmethylsilyl)distannene1was synthesized by the coupling reaction oftBu2MeSiNa with SnCl2-diox in THF and isolated as dark-green crystals. X-ray analysis of1showed the shortest SnSn double bond (2.6683(10) Å) among all acyclic distannenes, an almost planar geometry around the Sn atoms, and a highly twisted SnSn double bond. The reaction of distannene1with CCl4produced 1,2-dichlorodistannane2, implying that1does not dissociate into stannylenes, both in the solid state and in solution. The one-electron reduction of1with potassium furnished the corresponding distannene anion radical3, the stable ion radical of the heavy alkene analogues, which has been fully characterized by X-ray crystallography and ESR spectroscopy.