{"knowledge_schema": {"broad_category": "Organic Chemistry \u2192 Functional Group Transformations \u2192 Reactions of Organic Compounds", "refinement": "This problem involves identifying the structure of a compound based on its spectroscopic data and predicting the product of a specific reaction with red phosphorus and HI.", "specific_scope": "The focus is on analyzing the IR and NMR data of Compound X to deduce its structure and then determining the final product after its reaction with red phosphorus and HI, which typically involves the conversion of carboxylic acids to alkyl halides.", "goal": "Identify the structure of Compound X and predict the final product after its reaction with red phosphorus and HI."}, "summary": "In this problem, we analyze the IR and NMR data of Compound X to deduce its structure, which appears to be a benzoic acid derivative due to the presence of a broad signal at 10.5 ppm (indicative of a carboxylic acid) and the characteristic peaks in the IR spectrum. The reaction with red phosphorus and HI suggests a conversion of the carboxylic acid to an alkyl halide. Based on the candidates provided, the most likely structure of Compound X is 4-(sec-butyl)benzoic acid, which would yield 4-(sec-butyl)benzyl iodide as the final product after the reaction."}