首页> 外文期刊>Chemistry: A European journal >Substituent Effects on Edge-to-Face Aromatic Interactions
【24h】

Substituent Effects on Edge-to-Face Aromatic Interactions

机译:取代基对面对面芳香相互作用的影响

获取原文
获取原文并翻译 | 示例
           

摘要

Chemical double mutant cycles have been used to measure the magnitude of edge-to-face aromatic interactions in hydrogen-bonded zipper complexes as a function of substituents on both aromatic rings. The interaction energies vary depending on the combinnation of substituents from +1.0 kJ mol~(-1) (repulsive), to -4.9 kJ mol~(-1) (at-tractive). The results correlate with the Hammett substituent constants which indicates that electrostatic interactions are responsible for the observed differences in interaction energy. The experiments can be rationalised based on local electrostatic interactions between the protons on the edge ring and the pi-electron density on the face ring as well as global electrostatic interactions between the overall dipoles on the two aromatic groups.
机译:化学双突变体循环已被用于测量氢键结合的拉链复合物中边对面芳族相互作用的量,其是两个芳族环上取代基的函数。相互作用能根据取代基的组合而变化,从+1.0 kJ mol〜(-1)(排斥)到-4.9 kJ mol〜(-1)(吸引)。结果与哈米特取代基常数相关,这表明静电相互作用是观察到的相互作用能差异的原因。可以基于边缘环上的质子与面环上的pi电子密度之间的局部静电相互作用,以及两个芳族基团上的整体偶极子之间的整体静电相互作用,使实验合理化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号