Conformational and configurational analysis of an <i>N</i>
,<i>N</i>
carbonyl dipyrrinone-derived oximate and nitrone by NMR and quantum chemical calculations
作者:Ian Walton、Marauo Davis、Liu Yang、Yong Zhang、Destin Tillman、William L. Jarrett、Michael T. Huggins、Karl J. Wallace
DOI:10.1002/mrc.2728
日期:2011.5
energies of new N,N carbonyl dipyrrinone‐derived oxime molecules (E/Z‐s‐cis 4a and E/Z‐s‐cis 4b) have been investigated. The calculated energies, molecular geometries, and 1H/13C NMR chemical shifts agree with experimental data, and the results are presented herein. The E‐s‐cis conformations of 4a and 4b and the Z‐s‐cis conformation of 5b were found to be the thermodynamically most stable isomers with the
已经研究了新的 N,N 羰基双吡喃酮衍生的肟分子(E/Z-s-cis 4a 和 E/Z-s-cis 4b)的几何形状和相对能量。计算的能量、分子几何形状和 1H/13C NMR 化学位移与实验数据一致,结果在本文中给出。发现 4a 和 4b 的 E-s-cis 构象和 5b 的 Z-s-cis 构象是热力学上最稳定的异构体,其中肟氢原子或甲基官能团对双吡咯酮采取反取向团体。许多 2D NMR 实验明确支持这种构象。版权所有 © 2011 John Wiley & Sons, Ltd.