Raman investigations of indium iodide complexes: the species present in aqueous and diethyl ether solutions

Raman spectra of aqueous indium (III) iodide solutions, with and without added HI, reveal an equilibrium between two species: the complex anion InI4− (ν1 = 139 cm−1) and the solvated molecule InI3(H2O)x (νsym = 158 cm−1). The complex acid HInI4 is transferred from the aqueous acidic solution by solvent extraction; spectra of this species and the ether adduct InI3·Et2O (νsym = 151 cm−1) are reported. Copyright © 2001 John Wiley & Sons, Ltd.