The p−toluenesulfonate derived from (R)−2−octanol and p−toluenesulfonyl chloride was allowed to react with sodium benzenethiolate (C6H5SNa). Give the structure, including stereochemistry, of the product.

A thioether is formed as product with opposite configuration.

Explanation:

(R)-2-octanol substitutes Cl from p-toluenesulfonyl chloride to produce p-toluenesulfonate derivative. Here stereochemistry of 2-octanol is retained as no bond breaking or bond formation takes place at chiral center. gives reaction with p-toluenesulfonate derivative to produce a thioether with (S) configuration. Here inversion of configuration takes place due to backside attack by .Structure of product has been shown below.

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I’m not sure what your trying to say here.. can you clarify again?