{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves understanding nucleophilic substitution reactions and the formation of ether derivatives in organic synthesis.", "specific_scope": "The reaction involves the use of sodium hydride (NaH) as a strong base to deprotonate an alcohol, followed by protonation to yield the final product.", "goal": "Identify the major product formed from the reaction of (2-methylbut-3-en-2-yl)oxyethane with NaH and H+."}, "summary": "This problem pertains to organic chemistry, specifically focusing on reaction mechanisms involving nucleophilic substitution. The reaction described involves (2-methylbut-3-en-2-yl)oxyethane reacting with sodium hydride (NaH) and subsequent protonation to yield a major product. The goal is to determine the correct structure of the product formed, which is identified as 2-methyl-1-phenylbut-3-en-1-ol. Understanding the mechanism and the role of the reagents is crucial for solving this problem."}