Electronic Donation or Steric Contraction: A Spectroscopic and Structural Analysis of Medium-Sized Constrained Rings for Potential Long-Range Hyperconjugation.
Electronic Donation or Steric Contraction: A Spectroscopic and Structural Analysis of Medium-Sized Constrained Rings for Potential Long-Range Hyperconjugation.
复制标题
电子供体或空间收缩：中等尺寸约束环潜在长程超共轭的光谱和结构分析。
DOI：
10.1021/acs.joc.9b00979
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Wiget,PaulA
中科院分区：
文献类型：
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作者：
Lee,Robert;Bashrum,Bryan;Cagle,EthanC;Walters,Jillian;Massey,Jake;Zanghi,Monica;Birchfield,Carolyn;French,David;Joy,Jessica;DosPassosGomes,Gabriel;Wiget,PaulA
Herein, we report the1JCHanalyses, natural bond orbital analyses, and X-ray crystal structures of a number of C, O, and N constrained tricyclic cycles. These experiments provide access into the nature of the apparent Perlin effect previously reported in constrained tricyclic cycles, as well as evidence suggesting both steric contraction and long-range hyperconjugation account for the observed1JCHperturbations. We report a true Perlin effect of 10.9 Hz in an azocane and large steric effect resulting in Δ1JC–H= 10.9 Hz in a cyclooctane.
