{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves understanding the reactions of alkenes and alcohols under specific conditions, focusing on the products formed and the mechanisms that govern these transformations.", "specific_scope": "The reactions include the addition of HBr to an alkene in the presence of peroxide and the dehydration of an alcohol using sulfuric acid under heat.", "goal": "Identify the major products of the reactions and the mechanisms involved, specifically determining the correct products from the given candidates."}, "summary": "In this problem, we analyze two organic reactions: the addition of HBr to 3-methyl-1-pentene in the presence of peroxide, which follows a free radical mechanism leading to the formation of 1-bromo-3-methylpentane, and the dehydration of 2-methyl-2-butanol using H2SO4 under heat, which follows an elimination mechanism resulting in 2-methyl-2-butene. The goal is to identify the major products and the mechanisms involved, confirming that the correct answers are C = 1-bromo-3-methylpentane and D = 2-methyl-2-butene."}