{"knowledge_schema": {"broad_category": "Chemistry \u2192 Spectroscopy \u2192 NMR Spectroscopy", "refinement": "This problem involves interpreting 1H NMR spectra to identify the components of a mixture based on chemical shifts and signal patterns.", "specific_scope": "The focus is on analyzing the signals in the NMR spectrum of a 1:1 mixture of two aromatic compounds with the molecular formula C10H14, specifically looking at the number and ratio of signals.", "goal": "Determine the two aromatic compounds present in the mixture based on the provided NMR data."}, "summary": "In this problem, we analyze the 1H NMR spectrum of a 1:1 mixture of two aromatic compounds with the formula C10H14. The spectrum shows two singlets at around 6.7 ppm in a 1:1 ratio, indicating two distinct aromatic environments, and three singlets at around 2.2 ppm in a 2:1:1 ratio, suggesting different types of protons in the aliphatic region. By considering the candidates and their structures, we can deduce which two compounds are present based on the observed NMR signals."}