Interaction of a C–F Bond with the π-System of a CC Bond or “Head On” with a Proximate C–H Bond

We describe the synthesis and preliminary study of two
molecules,
in which a fluorine atom is positioned proximately above the π-orbitals
of a CC bond or else wherein a C–F bond interacts in
a “head on” fashion with a proximate C–H bond.
The spectroscopic characteristics of these unusual interactions are
documented, X-ray crystallographic analyses are reported, and theoretical
calculations are employed to support the observed spectroscopy.

本文报道了两种分子的合成及初步研究：其中一种分子的氟原子紧邻排布于碳碳双键（C=C）的π轨道（π-orbitals）上方，另一种分子则存在碳氟键（C-F）与邻近碳氢键（C-H）以"正面相向"方式发生的相互作用。本文记录了这类非常规相互作用的光谱学特征，报道了X射线晶体衍射（X-ray crystallographic）分析结果，并通过理论计算佐证了观测得到的光谱现象。