首页> 外文期刊>Chemistry: A European journal >The Carbon-Nitrogen Bonds in Ammonium Compounds Are Charge Shift Bonds
【24h】

The Carbon-Nitrogen Bonds in Ammonium Compounds Are Charge Shift Bonds

机译:铵化合物中的碳 - 氮键是电荷换键

获取原文
获取原文并翻译 | 示例
           

摘要

A comprehensive investigation, utilizing valencebond- and molecular-orbital-based techniques, reveals that C-N bonds in protonated and methylated ammonium compounds are charge shift bonds. Moreover, the ammonium compounds are predominantly covalent at equilibrium distance, yet have two competing dissociation channels, which determine whether or not a state function crossing occurs during dissociation. The location of the crossing point can be predicted with relative ionization potentials, and may be tuned by altering the stabilization of the respective fragments. By closely examining the nature of the C-N bond as it is stretched, a correlation is observed between the extent of the charge shift nature and bond length. Identification of charge shift bonds in these ubiquitous organic species specifically affects understanding of their role in organocatalysis, in which the C-N bond is stretched.
机译:综合性研究,利用基于价和基于分子轨道的技术,揭示了质子化和甲基化铵化合物中的C-N键是电荷换键。 此外,铵化合物在平衡距离处主要是共价,然而具有两个竞争的解离通道,其确定在解离期间是否发生状态函数交叉。 交叉点的位置可以预测相对电离电位,并且可以通过改变各个片段的稳定来调节。 通过在拉伸时密切检查C-N键的性质,在电荷变换性质和键长的程度之间观察到相关性。 这些普遍存在的有机物质中的电荷移粘键的识别特异性影响其在有机成分中的作用的理解,其中C-N键被拉伸。

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