{"knowledge_schema": {"broad_category": "Organic Chemistry \u2192 Spectroscopy \u2192 NMR Analysis", "refinement": "This problem involves analyzing the NMR spectrum of a specific organic compound and understanding the coupling patterns of hydrogen atoms in the molecule.", "specific_scope": "The focus is on interpreting the 1H NMR spectrum of product 3, specifically identifying the coupling pattern of the most deshielded hydrogen atom.", "goal": "Determine the correct coupling pattern of the most deshielded hydrogen atom in the 1H NMR spectrum of product 3."}, "summary": "In this problem, we analyze the 1H NMR spectrum of product 3, formed from a series of reactions starting with 1,3-dibromoadamantane. The task is to identify the coupling pattern of the most deshielded hydrogen atom, which is crucial for understanding the molecular structure and interactions. The answer is a 'triplet of triplets,' indicating that this hydrogen atom is coupled to two different sets of neighboring hydrogen atoms, leading to a complex splitting pattern."}