...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Conformations and CH/π interactions in aliphatic alkynes and alkenes
【24h】

Conformations and CH/π interactions in aliphatic alkynes and alkenes

机译：脂肪族炔烃和烯烃中的构象和CH /π相互作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The carbon 1s photoelectron spectra of a series of aliphatic alkynes and alkenes that have the possibility of possessing two or more conformers have been recorded with high resolution. The two conformers of 2-hexyne and 4-methyl-1-pentyne, anti and gauche, have been identified and quantified from an analysis of their carbon 1s photoelectron spectra, yielding 30 ± 5% and 70 ± 6% anti conformers, respectively. In the case of 1-hexyne, the photoelectron spectrum is shown to provide partial information on the distribution of conformers. Central to these analyses is a pronounced ability of the C1s photoemission process to distinguish between conformers that display weak γ-CH/π hydrogen bonding and those that do not. For the corresponding alkene analogs, similar analyses of their C1s photoelectron spectra do not lead to conclusive information on the conformational equilibria, mainly because of significantly smaller chemical shifts and higher number of conformers compared with the alkynes.
机译：高分辨率记录了一系列脂族炔烃和烯烃的碳1s光电子能谱，它们可能具有两个或更多个构象异构体。通过对它们的碳1s光电子能谱的分析，已经鉴定并定量了2-己炔和4-甲基-1-戊炔的两个构象异构体，分别得到30±5％和70±6％的抗构象异构体。在1-己炔的情况下，显示出光电子光谱可提供有关构象异构体分布的部分信息。这些分析的核心是C1s的光发射过程能够区分显示弱γ-CH/π氢键的构象异构体和不显示这些键的构象异构体。对于相应的烯烃类似物，对其C1s光电子光谱的类似分析不会导致有关构象平衡的结论性信息，这主要是因为与炔烃相比，化学位移明显较小，构象异构体数量较高。

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