Consider the epoxidation with peroxy benzoic acid. Which statement best describes the activation entropy of this reaction?

large and negative since, the reaction is bimolecular and the transition state is highly ordered

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slightly negative and typical for bimolecular reactions

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activation entropy is negligible

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large and positive since, the reaction is bimolecular and the transition state is highly ordered

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Solution

The correct option is A large and negative since, the reaction is bimolecular and the transition state is highly ordered
The activation entropy of this reaction is large and negative since, the reaction is bimolecular and the transition state is highly ordered. In other words, there is decrease in the entropy on going from reactants to transition state.

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