Fluorinated Aminopyridines: Synthesis, Structure, and Rare Liquid–Liquid Cocrystal Formation Driven by Unusually Short N–H···F–C Hydrogen Bonding
作者:Andrew J. Peloquin、Daniel A. Kure、Abby R. Jennings、Colin D. McMillen、Scott T. Iacono、William T. Pennington
DOI:10.1021/acs.cgd.0c00689
日期:2020.8.5
The role of hydrogen bonding in the crystal packing of a series of 4-aminoperfluoropyridines was studied using single-crystal X-ray crystallography. The aminoperfluoropyridines were synthesized using only excess amine to serve as both nucleophile and base. Instead of addition to the perfluoropyridine ring, a strong N–H···F–C hydrogen bond led to cocrystal formation of perfluoropyridine with sterically
使用单晶X射线晶体学研究了氢键在一系列4-氨基全氟吡啶晶体包装中的作用。仅使用过量的胺作为亲核试剂和碱来合成氨基全氟吡啶。除了加到全氟吡啶环上之外,强大的N–H···F–C氢键导致全氟吡啶与位阻胺二环己胺以及2-甲基哌啶共晶形成。据我们所知,这种形成是两种非反应性液体的首次报道,这两种液体仅由离散的小分子组成,结合形成在环境条件下稳定的共结晶固体。全氟吡啶在高于其正常沸点约100°C的晶格中稳定。