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On the Anion Exchange of P X 3 ( X = Cl, Br, I) in Ionic Liquids comprising Halide Anions
Author(s) -
Wolff Alexander,
Pallmann Julia,
Brunner Eike,
Doert Thomas,
Ruck Michael
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201600392
Subject(s) - ionic liquid , halide , chemistry , ionic bonding , inorganic chemistry , ion exchange , ion , chloride , raman spectroscopy , resonance (particle physics) , catalysis , organic chemistry , physics , optics , particle physics
Mixtures of the phosphorus(III) halides P X 3 ( X = Cl, Br, I) and the ionic liquids [HMIm][ X ] ( X = Cl, Br, I; HMIm = 1‐hexyl‐3‐methylimidazolium) were studied by nuclear magnetic resonance and Raman spectroscopy. The chloride PCl 3 was found to be stable in all mixtures, whereas PBr 3 and PI 3 can undergo halide exchange depending on the anion of the utilized ionic liquid. The exchange occurs immediately after mixing the compounds at room temperature. In contrast to previous observations made in conventional solvents, intermediate mixed phosphorus halides have not been observed in ionic liquids, indicating a rapid exchange under the applied conditions. Compared to the chemical shifts observed in nuclear magnetic resonance spectra of pure P X 3 liquids, the signal of PCl 3 is strongly shifted upfield in [HMIm][Cl] indicating strong interaction between the phosphorus halide and the surrounding ionic liquid.