The vibrational spectra of the halides and complex halides of the Group IIB elements. Part I. The vibrational spectra of Cdl3–, CdBr2, CdBr3–, CdCl2, CdCl3–, CdCl42–, and MgCl42–

Abstract

The Raman spectra of aqueous solutions of various r values (ratio of [X] to [Cd]), and of the tri-n-butyl phosphate (TBP) extracts of these aqueous solutions have been obtained. The vibrational frequencies of the following species are reported for the first time: Cdl₃^–, CdBr₂, CdBr₃^–, CdCl₂, CdCl₃^–, and CdCl₄^2–. The far-infrared spectrum (20–400 cm.^–1) of bis(tetraethylammonium) tetrachlorocadmate(II) is also reported. The Raman spectrum of a solution of bis(tetraethylammonium) tetrachloromagnesate(II) in thionyl chloride gives the frequency of the ν₁(a₁) vibration of the MgCl₄^2– anion.