Abstract
Time-resolved fluorescence-detected magnetic resonance (FDMR) is used to observe radical cations of thioethers in alkane and aromatic hydrocarbon solvents. Monomeric sulfide radical cations are stabilized at temperatures less than {approximately} 250 K in aromatic solvents such as toluene by electron donation from the solvent. The resulting arene-thioether complex radical cations are examples of mixed complex radical cations involving the interaction between lone-pair and {pi}-orbitals. The solvent interaction inhibits reactions of thioether radical cations (dimer formation and probably proton loss) and retards other radical cation reactions, such as dimer exchange. 39 refs., 7 figs., 4 tabs.
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