3,4‐Ferrocenyl‐Functionalized Pyrroles: Synthesis, Structure, and (Spectro)Electrochemical Studies
作者:Marcus Korb、Ulrike Pfaff、Alexander Hildebrandt、Tobias Rüffer、Heinrich Lang
DOI:10.1002/ejic.201301423
日期:2014.2
reported and show that the formal double bonds in the heterocyclic core are rather localized relative to pyrrole itself. The investigations with (spectro)electrochemical methods reveal the different capabilities for the formation of mixed-valent species and allows the classification of 3a,b as class II systems, whereas compounds that feature electron-withdrawing –C≡C– units (4a,b) can be assigned to class
3,4-Fc2-cC4H2NR [Fc = Fe(η5-C5H4)(η5-C5H5) 型的 3,4-二二茂铁基取代吡咯的合成;R = Ph (3a), SO2-4-MeC6H4 (Ts) (3b), SiiPr3 (3c)], 3,4-(FcC≡C)2-cC4H2NR [R = Ph (4a), Ts (4b)] , 和 3-Br-4-FcC≡C-cC4H2NR [R = Ph (7a), Ts (7b)] 来自 3,4-Br2-cC4H2NR [R = Ph (2a), Ts (2b), SiiPr3 (2c) )] 进行了讨论。报道了固态 3a、b、5、4b 和 7b 的分子结构,表明杂环核心中的形式双键相对于吡咯本身相当局部化。(光谱)电化学方法的研究揭示了形成混合价物质的不同能力,并允许将 3a,b 归类为 II 类系统,而具有吸电子 –C≡C– 单元 (4a,b ) 可以根据 Robin