Radical-anions of 9-substituted thioxanthen S-oxides have been prepared and their e.s.r. spectra measured. For the two 9-methyl isomers the S–O group has the pseudoaxial conformation, in contrast to its pseudoequatorial conformation in the neutral compounds. The spectra of decomposition products are also observed.
P. Lambelet and E. A. C. Lucken, J. Chem. Soc., Perkin Trans. 2, 1978, 617 DOI: 10.1039/P29780000617
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