<i>Z</i>,<i>E</i>-Isomerization mechanism for<i>N</i>-arylthio-1,4-benzoquinonimines: DNMR and DFT investigations
作者:V. V. Pirozhenko、A. B. Rozhenko、A. P. Avdeenko、S. A. Konovalova、A. A. Santalova
DOI:10.1002/mrc.2254
日期:2008.9
Z, E‐Isomerization has been investigated for the series of the N‐arylthio‐1,4‐benzoquinonimines using a line shape analysis in the 1H NMR spectra. Thermodynamic parameters and substituent effects have been analyzed for the isomerization process. It has been shown based on the DFT (B3LYP) calculations that the dynamic transformation for N‐arylthio‐1,4‐benzoquinonimines should be considered as a combination
已经使用 1H NMR 谱中的线形分析研究了 N-芳硫基-1,4-苯醌亚胺系列的 Z, E-异构化。分析了异构化过程的热力学参数和取代基效应。基于 DFT (B3LYP) 计算表明,N-芳硫基-1,4-苯醌亚胺的动态转化应被视为两种不同过程的组合,围绕 NS 键的旋转和在氮通过具有线性 C NS 部分的过渡态。实验测量的异构化活化的自由能 (ΔG298 K) 取决于醌亚胺部分和苯环中的取代,并且可以指氮原子的反转或围绕 NS 键的受阻旋转。版权所有 © 2008 John Wiley &