{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Stereochemistry and Reaction Mechanisms", "refinement": "This problem involves the stereochemical outcomes of reactions involving alkenes and the analysis of products using chromatographic techniques.", "specific_scope": "The focus is on the reactions of (E)-oct-4-ene and (Z)-oct-4-ene with mCPBA, followed by acid workup, and how these reactions yield different products that can be analyzed by HPLC.", "goal": "Determine the number of peaks observed in standard and chiral HPLC for the products of the reactions."}, "summary": "In this problem, we analyze the reactions of (E)-oct-4-ene and (Z)-oct-4-ene with mCPBA, which leads to the formation of epoxides followed by acid-catalyzed ring opening. The (E)-isomer yields two products (one being a racemic mixture), while the (Z)-isomer yields three products due to the formation of different stereoisomers. In standard HPLC, both reactions yield 2 peaks due to the presence of two distinct compounds. However, in chiral HPLC, the (Z)-isomer produces 3 peaks due to the presence of enantiomers, while the (E)-isomer still results in 2 peaks. Therefore, the chemist observes 2 peaks in standard HPLC and 3 peaks in chiral HPLC."}