{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Stereochemistry and Reaction Mechanisms", "refinement": "This problem involves the reactions of alkenes with mCPBA, leading to epoxidation and subsequent acid-catalyzed ring opening, which affects the stereochemistry of the products.", "specific_scope": "The focus is on the outcomes of two different stereoisomers of oct-4-ene (E and Z) when subjected to the same reaction conditions, and how these outcomes are reflected in chromatographic analysis.", "goal": "To determine the number of peaks observed in standard and chiral HPLC for the products of the reactions involving (E)-oct-4-ene and (Z)-oct-4-ene."}, "summary": "This problem examines the reactions of (E)-oct-4-ene and (Z)-oct-4-ene with mCPBA, leading to the formation of epoxides and their subsequent acid-catalyzed ring openings. The resulting products differ in stereochemistry, which affects their behavior in chromatographic analysis. In standard HPLC, the chemist will observe 2 peaks due to the formation of two distinct products from each starting material. In chiral HPLC, the presence of chiral centers in the products leads to 3 peaks, reflecting the different stereoisomers formed. Thus, the correct observation is 2 peaks in standard HPLC and 3 peaks in chiral HPLC."}