Synthesis and Properties of the First Stable Neutral Germaaromatic Compound, 2-{2,4,6-Tris- [bis-(trimethylsilyl)methyl]phenyl}-2-germanaphthalene
作者:Norio Nakata、Nobuhiro Takeda、Norihiro Tokitoh
DOI:10.1021/om020879m
日期:2003.2.1
The first stable neutral germaaromatic compound, 2-germanaphthalene 1a, was synthesized by taking advantage of an extremely bulky and efficient steric protection group, 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl (Tbt). The molecular structure and aromaticity of 1a were discussed on the basis of its NMR, UV−vis, and Raman spectra, X-ray crystallographic analysis, and theoretical calculations. All the
第一个稳定的中性细菌芳香化合物2-germanaphthalene 1a,是利用一个非常庞大且有效的空间保护基团2,4,6-三[双(三(三甲基甲硅烷基)甲基]苯基(Tbt)合成的。基于1a的NMR,UV-vis和拉曼光谱,X射线晶体学分析和理论计算,讨论了1a的分子结构和芳香性。1a的2-germanaphthalene环的所有1 H和13 C NMR化学位移与2-germanaphthalene和2-phenyl-2-germanaphthalene的计算值非常吻合。1a的UV-vis和拉曼光谱图与萘类似,尽管观察到由于用锗置换碳而导致的波长向更长波长(在紫外可见光谱中)和较小波数(在拉曼光谱中)的移动。1a的X射线晶体学分析表明,2-锗烷环几乎是平面的,并且垂直于Tbt基团的苯环。这些实验结果表明在1a的2-锗烷环中π电子的离域。理论计算(NICS(1),Λ和ASE isom)也表明了