The vibrational spectra of some chloro-complexes of sulphur, selenium, and tellurium in the (4+) oxidation state

Abstract

The vibrational spectra of the following species under a variety of conditions are reported and discussed: MCl₄ and MCl₄,SbCl₅(M = S, Se, Te); TeCl₃,AsF₆; TeCl₄,PCl₅; TeCl₄,AlCl₃; SCl₂; S₂Cl₂; MCl₆^2–(M = Se, Te). Molecular-weight data are given for benzene solutions of TeCl₄ and TeCl₄,AlCl₃. The ultraviolet spectra of solutions of TeCl₆^2– and TeCl₄ in propionitrile show the formation of a new species at a mole ratio of 1 : 1. This new species is apparently the TeCl₅^– ion. Some data are reported for the compounds SeCl₄,py₂ and TeCl₄,py₂(py = pyridine).