卤化物
化学
离子液体
三卤化物
无机化学
单独一对
卤素
离子键合
磷
氢键
离子
扩散
Atom(片上系统)
溶剂
结晶学
分子
有机化学
催化作用
嵌入式系统
物理
热力学
计算机科学
烷基
作者
Oldamur Hollóczki,Alexander Wolff,Julia Pallmann,Rachel E. Whiteside,Jennifer M. Hartley,Matthias A. Grasser,Peter Nockemann,Eike Brunner,Thomas Doert,Michael Ruck
标识
DOI:10.1002/chem.201803558
摘要
Abstract PX 3 compounds (X=Cl, Br, I) in imidazolium halide ionic liquids combine with the anion Z (Z=Cl, Br, I) of the solvent to form [PX 3 Z] − complex anions. These anions have a sawhorse shape in which the lone pair of the phosphorus atom fills the third equatorial position of the pseudotrigonal bipyramid. Theoretical results show that this association remains incomplete due to strong hydrogen bonding with the cations of the ionic liquid, which competes with the phosphorus trihalide for interaction with the Z − anion. Temperature‐dependent 31 P NMR experiments indicated that the P−Z binding is weaker at higher temperature. Both theory and experiment evidence dynamic exchange of the halide anions at the phosphorus atom, together with continuous switching of the ligands at the phosphorus atom between equatorial and axial positions. Detailed knowledge of the mechanism of the spontaneous exchange of halogen atoms at phosphorus trihalides suggests a way to design novel, highly conducting ionic‐liquid mixtures.
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