Ferrocenylmethyl-functionalized 5-membered heterocycles: Synthesis, solid-state structure and electrochemical investigations
作者:Deeb Taher、Asma Ghazzy、Firas F. Awwadi、Wissam Helal、Khaled Al Khalyfeh、Marcus Korb、Alexander Hildebrandt、Eduard Kovalski、Heinrich Lang
DOI:10.1016/j.poly.2018.06.038
日期:2018.9
It was found that for 3a, a somewhat higher Fc/Fc+ redox potential (E0′) is observed when compared with the more electron-rich systems 3b,c,d. The molecular electronic structures of the title compounds were additionally investigated by DFT calculations, revealing different degrees of HOMO–LUMO energy gaps within the series, due to a lowering of the LUMO energy, depending on the nature of the heterocyclic
用两当量的ClC(O)R(2)(a,R = 2-cC4H3O; b,R = 2-cC4H3S; c,R = 2-cC4H3Se; d,R = 3-cC4H3S)生成相应的二茂铁基羧酸铁Fe(η5-C5H4CH2OC(O)R)2(3a–d),而FcCH2OLi反应(Fc = Fe(η5-C5H5)(η5-C5H4))用摩尔比为2:1的2,5-(ClC(O))2-cC4H2X(5)(a,X = O; b,X = S; c,X = Se)生成2,5-(FcCH2OC (O))2-cC4H2X(6a–c)。化合物3a–d和6a–c通过元素分析,NMR(1H和13C 1H})和IR光谱进行了表征。通过单晶X射线结构分析确定固态的3a,b,d的分子结构。化合物3a在单斜空间群P21 / c中结晶,而3b,d在三斜空间群P-1中结晶。酯基和杂原子相对于彼此呈反排列。使用[NnBu4] [B(C6F5)