Abstract

Infrared and Raman spectra of disulfide dioxides were examined to determine whether they possess the thiosulfonate of disulfoxide structure. Strong absorptions identified with the SO₂ group support the thiolsulfonate structure. A comparison of infrared spectra of a butyl series of sulfide, sulfoxide, sulfone, sulfinate, sulfonate, disulfide, thiolsulfinate, disulfide dioxide (thiolsulfonate), and α-disulfone confirms the evidence for the thiolsulfonate structure for both the symmetrical and unsymmetrical compounds. With isomeric pairs of mixed disulfide dioxides, the spectra are different in all cases. Where R is CH₃, there are strong absorptions at 10.4–10.5 and 20.7–20.8 μ only when the methyl is attached to the sulfur atom presumed by synthesis to be in the oxidized SO₂ form. In the reverse isomers, these strong bands, which are associated with CH₃SO₂-, are absent.

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