From 4-nitrotoluene and 4,4′-dinitrobibenzyl to <i>E</i>-4,4′-dinitrostilbene: an electrochemical approach
作者:Iluminada Gallardo、Ana Belén Gómez、Gonzalo Guirado、Adrián Lariño、Miquel Moreno、Manuel Ortigosa、Sergio Soler
DOI:10.1039/c8nj00131f
日期:——
The dianions formed by the electroreduction of Z-O2NC6H4CHCHC6H4NO2, E-O2NC6H4CHCHC6H4NO2, O2NC6H4CH2–CH2C6H4NO2 or O2NC6H4CMeH–CMeHC6H4NO2, as well as the anion radical arising from 4-nitrotoluene, are stable, in the time scale of cyclic voltammetry (DMF + 0.10 M NBu4BF4). However, in the electrolysis time scale (from minutes to hours), only the dianion O2NC6H4CMeH–CMeHC6H4NO22− remains stable, since
通过Z -O 2 NC 6 H 4 CH CHC 6 H 4 NO 2,E -O 2 NC 6 H 4 CH CHC 6 H 4 NO 2,O 2 NC 6 H 4 CH 2 -CH 2的电还原形成的阴离子。C 6 H 4 NO 2或O 2 NC 6 H 4 CMeH–CMeHC 6 H在循环伏安法(DMF + 0.10 M NBu 4 BF 4)的时间范围内, 4 NO 2以及由4-硝基甲苯产生的阴离子自由基是稳定的。但是,在电解时间范围内(从几分钟到几小时),只有二价阴离子O 2 NC 6 H 4 CMeH–CMeHC 6 H 4 NO 2 2-保持稳定,因为还原的物质Z -O 2 NC 6 H 4 CHCHC 6 H 4 NO 2 2-,O 2 NC 6 H4 CH 2 -CH 2 C ^ 6 ħ 4 NO 2 2-或O的2 NC 6 H ^ 4 ME - ,进化以形成ë -O 2 NC