A stable fused bicyclic disilene as a model for silicon surface
A stable fused bicyclic disilene as a model for silicon surface
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DOI：
10.1021/ja055718z
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发表时间：
2005-11-09
影响因子：
15
通讯作者：
Kira, M
中科院分区：
文献类型：
--
作者：
Kobayashi, H;Iwamoto, T;Kira, M
我们合成了第一个融合的双环二烯1，在拓扑上代表了Si（001）表面直到第三层的部分结构。在固态中，五元环呈包络构象，与Si（001）表面的高顺弯二聚体相比，Si（001）表面的Si（001）双键以微顺弯形式存在（弯曲角θ为3.6°）。1的高度对称的1h NMR谱图在- 80°C时仍然保持均匀，表明双环骨架在溶液中容易翻转。在1与水反应时，得到了辛-加合物，而在与四氯化碳反应时，观察到氯原子在1的SiSi双键上的反加成。9,10-菲醌加合物7的结构特征与所提出的吸附在Si（001）表面的9,10-菲醌分子的结构基本一致。
We synthesized the first fused bicyclic disilene1representing topologically a partial structure of the Si(001) surface up to the third layer. In the solid state, the five-membered rings adopt the envelope conformation, and the SiSi double bond in1exists in the slightlycis-bent form (bent angle θ is 3.6°) compared to that of the highlycis-bent dimer on the Si(001) surface. Highly symmetric1H NMR spectral pattern of1remains even at −80 °C, indicating the facile ring flipping of the bicyclic skeleton in solution. Whilesyn-adduct was obtained in the reaction of1with water,anti-addition of chlorine atoms across the SiSi double bond in1was observed in the reaction with carbon tetrachloride. The structural characteristics of the 9,10-phenanthrenequinone adduct7are in good accord with those of the proposed structure of the 9,10-phenanthrenequinone molecule adsorbed on the Si(001) surface.