Synthesis and structural characterization of a stable betaine imino-nitroxide free diradical
作者:Anca Paun、Irina Zarafu、Miron T. Caproiu、Petre Ionita
DOI:10.3998/ark.5550190.p008.314
日期:——
compounds, a stablediradical of imino-nitroxide type has been synthesized in a multistep process. Structuralcharacterization of the intermediates and final product included 1 Hand 13 C-NMR, elemental analysis, IR, UV-Vis and EPR spectroscopy. The stablediradical contains also a betaine structure with extended conjugation, which is responsible for its intense colour. Reduction of the stablebetaine diradical
从现成的化合物开始,已经在多步过程中合成了稳定的亚氨基氮氧化物类型的双自由基。中间体和最终产品的结构表征包括 1 Hand 13 C-NMR、元素分析、IR、UV-Vis 和 EPR 光谱。稳定的双自由基还包含具有扩展共轭作用的甜菜碱结构,这是其强烈颜色的原因。稳定甜菜碱双自由基的还原导致颜色从蓝色变为黄色。该过程是可逆的,氧化还原甜菜碱双自由基。