Spontaneous Substitutions at Phosphorus Trihalides in Imidazolium Halide Ionic Liquids: Grotthuss Diffusion of Anions?

Holloczki O, Wolff A, Pallmann J, Whiteside RE, Hartley J, Grasser MA, Nockemann P, Brunner E, Doert T, Ruck M (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Chemistry - A European Journal Wiley

Book Volume: 24

Pages Range: 16323-16331

Journal Issue: 61

DOI: 10.1002/chem.201803558

Abstract

PX3 compounds (X=Cl, Br, I) in imidazolium halide ionic liquids combine with the anion Z (Z=Cl, Br, I) of the solvent to form [PX3Z]− 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 31P 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.

Involved external institutions

Rheinische Friedrich-Wilhelms-Universität Bonn DE Germany (DE) Technische Universität Dresden DE Germany (DE) Queen's University GB United Kingdom (GB) Technische Universität Bergakademie Freiberg DE Germany (DE)

How to cite

APA:

Holloczki, O., Wolff, A., Pallmann, J., Whiteside, R.E., Hartley, J., Grasser, M.A.,... Ruck, M. (2018). Spontaneous Substitutions at Phosphorus Trihalides in Imidazolium Halide Ionic Liquids: Grotthuss Diffusion of Anions? Chemistry - A European Journal, 24(61), 16323-16331. https://doi.org/10.1002/chem.201803558

MLA:

Holloczki, Oldamur, et al. "Spontaneous Substitutions at Phosphorus Trihalides in Imidazolium Halide Ionic Liquids: Grotthuss Diffusion of Anions?" Chemistry - A European Journal 24.61 (2018): 16323-16331.

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