Identification of mixed bromidochloridotellurate anions in disordered crystal structures of (bdmim)2[TeX2Y4] (X, Y = Br, Cl; bdmim = 1-butyl-2,3-dimethylimidazolium) by combined application of Raman spectroscopy and solid-state DFT calculations

Discrete mixed [TeBr2Cl4]2− and [TeBr2Cl4]2− anions in their disordered crystal structures have been characterized by considering combined information from X-ray diffraction, Raman spectroscopy, and solid-state DFT calculations employing periodic boundary conditions.