title: Speciation of chloroindate(III) ionic liquids.
abstract: A range of chloroindate(iii) ionic liquid systems was prepared by mixing of 1-alkyl-3-methylimidazolium chloride with indium(iii) chloride in various ratios, expressed as the mol fraction of indium(iii) chloride, chi(InCl(3)). For chi(InCl(3))</= 0.50, the products were liquids, whereas for chi(InCl(3)) > 0.50, the products were biphasic (suspensions of a solid in an ionic liquid). Speciation of these chloroindate(iii) systems was carried out using a wide range of techniques: differential scanning calorimetry (DSC), polarised optical microscopy (POM), liquid-state and solid-state (115)In NMR spectroscopy, X-ray photoelectron spectroscopy (XPS) and extended X-ray absorption fine structure (EXAFS). Ionic liquids prepared using an excess of the organic chloride (chi(InCl(3)) < 0.5) contained [InCl(6)](3-), [InCl(5)](2-) and [InCl(4)](-) anions, in proportions dependent on the chi(InCl(3)) value. Equimolar mixtures yielded single compounds: 1-alkyl-3-methylimidazolium tetrachloroindates(iii). Systems containing an excess of indium(iii) chloride (chi(InCl(3)) > 0.5) contained indium(iii) chloride powder suspended in a neutral tetrachloroindate ionic liquid.
authors: Department of Chemistry, Durham University, South Road, Durham, UKDH1 3LE.
authors: David C
authors: DC
authors: Apperley
authors: Christopher
authors: C
authors: Hardacre
authors: Peter
authors: P
authors: Licence
authors: Richard W
authors: RW
authors: Murphy
authors: Natalia V
authors: NV
authors: Plechkova
authors: Kenneth R
authors: KR
authors: Seddon
authors: Geetha
authors: G
authors: Srinivasan
authors: Małgorzata
authors: M
authors: Swadźba-Kwaśny
authors: Ignacio J
authors: IJ
authors: Villar-Garcia