{"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 based on its spectral characteristics.", "specific_scope": "The focus is on analyzing the chemical shifts, splitting patterns, and integration of the NMR signals to distinguish between isomeric compounds related to propenyl and butenyl acetate.", "goal": "Identify the correct structure of the unknown organic compound from the given candidates based on the provided 1H NMR data."}, "summary": "This problem requires the interpretation of 1H NMR data to identify an unknown organic compound among four candidates: Cis-propenyl acetate, Trans-propenyl acetate, Cis-butenyl acetate, and Trans-butenyl acetate. By analyzing the chemical shifts, splitting patterns, and integration of the NMR signals, we can deduce the structure of the compound. The goal is to match the observed spectral features with the expected characteristics of the candidates to determine the correct compound."}