{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Pericyclic Reactions", "refinement": "This problem specifically deals with sigmatropic rearrangements, a subset of pericyclic reactions where a pi bond migrates into a sigma bond, often under heat and acidic conditions.", "specific_scope": "The task involves predicting the products of specific reactions involving given reactants and conditions, focusing on the outcomes of sigmatropic rearrangements.", "goal": "Identify the correct products (A, B, and C) of the given reactions based on the principles of sigmatropic rearrangements."}, "summary": "This problem involves understanding sigmatropic rearrangements, a type of pericyclic reaction where a pi bond migrates into a sigma bond, typically favored thermodynamically. The task is to predict the products of three specific reactions involving organic compounds under heat and acidic conditions. The correct products are identified as A = (Z)-1-(but-2-en-2-yloxy)ethen-1-amine, B = (3Z,4E)-3,4-diethylidenecyclobut-1-ene, and C = 4-methylenehexanal."}