{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Spectroscopy", "refinement": "This problem involves interpreting 1H NMR (proton nuclear magnetic resonance) data to identify the structure of an organic compound.", "specific_scope": "The focus is on analyzing the chemical shifts, splitting patterns, and integration of the NMR signals to distinguish between isomeric forms of butenyl and pentenyl acetate.", "goal": "Identify the correct structure of the unknown organic compound based on the provided 1H NMR data."}, "summary": "This problem requires the interpretation of 1H NMR data to identify an unknown organic compound among several isomeric options. The chemical shifts and splitting patterns in the NMR spectrum provide clues about the structure, specifically regarding the presence of double bonds and the arrangement of substituents. By analyzing the data, the goal is to determine that the unknown compound is Trans-2-butenyl acetate."}