The vibrational spectra of the halides, complex halides and mixed halides of thallium(III). Part I. The vibrational spectra of TlBr3, TlBr4, TlCl6 3? and TlCl4 ?
- 1 January 1968
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 2050-2054
- https://doi.org/10.1039/j19680002050
Abstract
The Raman spectrum of a solution of thallic bromide in ethanol to which lithium bromide has been added is compatible with the existence of the TlBr4 anion (symmetry Td). A number of other solutions containing this anion were also investigated. The i.r. and Raman spectra of solutions of thallic bromide in ethanol and in tri-n-butyl phosphate (TBP) indicate that these solutions consist of a mixture of TlBr3 and TlBr4 –, and not the TlBr4 – anion alone as reported previously. The Raman spectrum of a solution of thallic chloride in 1 OM-aqueous lithium chloride shows that this solution contains the TlCl6 3– anion, of point group Oh. The tri-n-butyl phosphate extract of this solution gives the Raman spectrum of the TlCl4 – anion. A number of other solutions containing this anion are also investigated. The far-i.r. spectrum (20–400 cm.–1) of NEt4TlCl4 is also reported. Solutions of NEt4TlCl3Br and NEt4TlBr3Cl in acetonitrile are shown to consist of mixtures of the TlBr4 – and TlCl4 – anions.Keywords
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