No abstract
By C. J. M. STIRLING. NUCLEOPHILIC displacement of halogen from halogeno-olefinic sulphones has been extensively studied by Modena and his collaborators2 and, in certain instances, the reactions have been considered to involve elimination followed by addition. The chloride (111) appeared to be a particularly favourable case for the operation of an elimination-addition mechanism via the allene (IV). As the structures of the products obtained with a series of nucleophiles from this allene, as well as from the acetylenic isomers (I) and (VI), have already been established,lv 3 the reactions of the same nucleophiles with the chloride (111) have now been examined in order to discover which of a number of possible alternative reaction paths is indicated by the products obtained.
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