Synthesis of Quinoidal Fused Oligosiloles by Rhodium-Catalyzed Stitching Reaction and Theoretical Investigation of Their Properties
作者:Ryo Shintani、Nana Misawa、Tomohiro Tsuda、Ryo Iino、Mikiya Fujii、Koichi Yamashita、Kyoko Nozaki
DOI:10.1021/jacs.7b00344
日期:2017.3.15
stitching reaction. Employing [RhCl(tfb)]2 as the catalyst significantly improved the stitching efficiency, and up to six siloles could be fused in quinoidal form. A systematic comparison of the physical properties of Si1-Si6' confirmed the unique trend in their LUMO levels, which become higher with longer π conjugation. To understand the origin of this unusual trend, theoretical calculations were also
通过铑催化的缝合反应合成了含有偶数个硅醇单元的新型醌型稠合低聚硅醇。使用 [RhCl(tfb)]2 作为催化剂显着提高了缝合效率,最多可以融合六个 siloles 以醌型形式。对 Si1-Si6' 物理性质的系统比较证实了它们 LUMO 能级的独特趋势,随着 π 共轭时间的延长,LUMO 能级变得更高。为了理解这种不寻常趋势的起源,还使用各种模型化合物进行了理论计算,结果表明 Si1-Si6 (Si1a-Si6a) 中的末端茚基(环戊二烯基)部分是通过其前沿导致这种现象的主要原因与中心多烯单元的 HOMO 的轨道相关性,