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Capture and Reactivity of an Elusive Carbon–Sulfur Centered Biradical

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journal contribution
posted on 02.03.2020, 16:37 by Dennis Gerbig, Bastian Bernhardt, Raffael C. Wende, Peter R. Schreiner
The initial oxidation product of dimethyl sulfide in the marine boundary layer, the methyl thiomethyl radical, has remained elusive. A structurally analogous biradical with one radical center in the α-position to a sulfur atom could now be obtained by UV irradiation of p-nitrobenzaldehyde dithiane isolated in solid dinitrogen (N2) or Ar at cryogenic temperatures. A spin-forbidden reaction with triplet dioxygen (3O2) does not occur. The dithiane of o-nitrobenzaldehyde rather undergoes a series of rearrangements under the same conditions, resulting in overall photodeprotection.