（二叔丁基二甲基硅基）二锡烯=锡（二甲基叔丁基硅基）₂：一种具有>Sn=Sn<双键的二锡烯，在固态和溶液中均稳定。
(tBu2MeSi)2Sn=Sn(SiMetBu2)2: a distannene with a >Sn=Sn< double bond that is stable both in the solid state and in solution.
作者信息
Lee Vladimir Ya, Fukawa Tomohide, Nakamoto Masaaki, Sekiguchi Akira, Tumanskii Boris L, Karni Miriam, Apeloig Yitzhak
机构信息
Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
出版信息
J Am Chem Soc. 2006 Sep 6;128(35):11643-51. doi: 10.1021/ja063322x.
((t)Bu(2)MeSi)(2)Sn=Sn(SiMe(t)Bu(2))(2) 1, prepared by the reaction of (t)Bu(2)MeSiNa with SnCl(2)-diox in THF and isolated as dark-green crystals, represents the first example of acyclic distannene with a Sn=Sn double bond that is stable both in the crystalline form and in solution. This was proved by the crystal and NMR spectral data of 1. Distannene 1 has these peculiar structural features: a shortest among all acyclic distannenes Sn=Sn double bond of 2.6683(10) A, a nearly planar geometry around both Sn atoms, and a highly twisted Sn=Sn double bond. The reactions of 1 toward carbon tetrachloride and phenylacetylene also correspond to the reactivity anticipated for the Sn=Sn double bond. The one-electron reduction of 1 with potassium produced the distannene anion radical, the heavy analogue of alkene ion radicals, for which the particular crystal structure and low-temperature EPR behavior are also discussed.
通过叔丁基二甲基硅基钠与二氯化锡 - 二氧六环在四氢呋喃中反应制备并以深绿色晶体形式分离得到的((t)Bu(2)MeSi)(2)Sn=Sn(SiMe(t)Bu(2))(2) 1，是首例具有Sn=Sn双键的非环状二锡烯，其在晶体形式和溶液中均稳定。这一点通过1的晶体和核磁共振光谱数据得以证明。二锡烯1具有这些独特的结构特征：在所有非环状二锡烯中最短的Sn=Sn双键，键长为2.6683(10) Å，两个锡原子周围近乎平面的几何构型，以及高度扭曲的Sn=Sn双键。1与四氯化碳和苯乙炔的反应也符合Sn=Sn双键预期的反应活性。用钾对1进行单电子还原生成了二锡烯阴离子自由基，即烯烃离子自由基的重原子类似物，文中还讨论了其特殊的晶体结构和低温电子顺磁共振行为。
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