作者:Yoshiharu Nagasaka、Chitoshi Kitamura、Hiroyuki Kurata、Takeshi Kawase
DOI:10.1246/cl.2011.1437
日期:2011.12.5
π-Extended silole and pyrrole analogs fused with two acenaphthylene units were synthesized from 2,2′-dibromo-1,1′-biacenaphthylene. The pyrrole was obtained as a stable compound, while the silole was thermally stable, but highly acid-sensitive purple crystals. The molecular structures reveal that both heteroles have a planar π-system and stack to form a head-to-tail dimer structure. Observed electronic and electrochemical properties obviously indicate low LUMO energy level of the silole and high HOMO level of the pyrrole as predicted by DFT calculations.
以 2,2′-二溴-1,1′-联萘为原料合成了融合了两个苊单元的π-扩展硅咯和吡咯类似物。得到的吡咯是一种稳定的化合物,而硅烯则是热稳定但对酸高度敏感的紫色晶体。分子结构显示,这两种杂环都具有平面 π 系统,并堆叠形成头尾二聚体结构。观察到的电子和电化学特性明显表明,正如 DFT 计算所预测的那样,硅ole 的 LUMO 能级较低,而吡咯的 HOMO 能级较高。