Abstract
In order to elucidate the mechanism of the ligand-exchange reaction between sulfonium salt and organolithium, the reactions of organolithiums with 10-substituted 9, 9-dimethylthioxanthenium salts and dibenzothiophenium salts having a bulky group at 5-position have been carried out to get the results, as shown in Tables I and II. It has been proposed that the SN2 type mechanism is valid for the ligand exchange in the reactions described above.
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