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The reactions of 5-substituted dibenzothiophenium salts and 10-arylthioxanthenium salts with organolithiums have been found to yield ring opening products (A), ligand exchange ring opening products (B) and other products, as shown in Tables 1, 2, and 3, respectively. The formation of these compounds supports the assumption of the pseudorotation of pentacoordinated sulfur intermediates in these reactions.
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Hori et al. (1972) studied this question.
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