{"knowledge_schema": {"broad_category": "Organic Chemistry \u2192 Spectroscopy \u2192 NMR Spectroscopy", "refinement": "This problem involves analyzing the NMR spectrum of a specific organic compound to determine the coupling pattern of a particular hydrogen atom.", "specific_scope": "The focus is on the 1H NMR spectrum of product 3, which is derived from a series of reactions starting from 1,3-dibromoadamantane.", "goal": "Identify the 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, which is formed through a series of reactions starting from 1,3-dibromoadamantane. The goal is to determine the coupling pattern of the most deshielded hydrogen atom, excluding those that exchange with deuterated solvent. Understanding the coupling patterns in NMR is crucial for interpreting the structure of organic compounds. The options provided include various coupling patterns, and careful consideration of the molecular structure and the environment of the hydrogen atoms will lead to the correct answer."}