Issue 5, 2005
From the journal:

New Journal of Chemistry

Synthesis and characterization of ionic liquids based upon 1-butyl-2,3-dimethylimidazolium chloride/ZnCl2

Vincent Lecocq,a   Aurélie Graille,a   Catherine C. Santini,*a   Anne Baudouin,a   Yves Chauvin,a   Jean Marie Basset,a   Laurence Arzel,b   Denis Bouchub  and  Bernard Fenetc  

* Corresponding authors

a Laboratoire de Chimie Organométallique de Surface (CNRS UMR 9986), ESCPE Lyon, 43 bd du 11 Novembre 1918, Villeurbanne cedex, France
E-mail: santini@cpe.fr
Fax: +33 (0)4 72 43 17 95
Tel: +33 (0)4 72 43 17 94

b Centre Commun de Spectrométrie de Masse, ESCPE Lyon, 43 bd du 11 Novembre 1918, Villeurbanne cedex, France

c Laboratoire de Résonance Magnétique Nucléaire: Méthodologie et Instrumentation en Biophysique (CNRS UMR 5012), Université Claude Bernard (Lyon I), 3, rue Victor Grignard, Villeurbanne cedex, France

Abstract

Trialkylimidazolium chlorozincate molten salts resulting from the combination of zinc chloride and 1-butyl-2,3-dimethylimidazolium chloride, [BMMI][Cl], have been prepared with a mole percent of ZnCl2, R (R = nZnCl2/nZnCl2 + n[BMMI][Cl]) equal to 0, 0.1, 0.25, 0.33, 0.5, 0.66, 0.75. Their analyses by DSC, 13C, 1H and 35Cl solid state and solution NMR, and mass spectrometry (ESI, MS/MS) are consistent with the presence of [BMMI][Cl] and [BMMI][ZnCl3] for R < 0.5; pure [BMMI][ZnCl3] for R = 0.5, and [BMMI][ZnCl3] with [BMMI][Zn3Cl7] for R > 0.5. Infrared spectra realized in the presence of pyridine show that the Lewis acidity of ZnCl2–[BMMI][Cl] increases with R. High temperature (110 °C) 13C and 35Cl NMR experiments on neat [BMMI][ZnCl3] (R = 0.5) evidenced that its structure varies with time from [BMMI][ZnCl3] to [BMMI⋯Cl⋯ZnCl2].

Graphical abstract: Synthesis and characterization of ionic liquids based upon 1-butyl-2,3-dimethylimidazolium chloride/ZnCl2

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Article information

DOI
https://doi.org/10.1039/B413328E
Article type
Paper
Submitted
30 Aug 2004
Accepted
12 Jan 2005
First published
21 Mar 2005

New J. Chem., 2005,29, 700-706

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Synthesis and characterization of ionic liquids based upon 1-butyl-2,3-dimethylimidazolium chloride/ZnCl2

V. Lecocq, A. Graille, C. C. Santini, A. Baudouin, Y. Chauvin, J. M. Basset, L. Arzel, D. Bouchu and B. Fenet, New J. Chem., 2005, 29, 700 DOI: 10.1039/B413328E

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