{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Reactions \u2192 Product Prediction", "refinement": "This problem involves predicting the major products of organic reactions based on the structure of reactants and the conditions provided.", "specific_scope": "The focus is on two specific reactions: one involving a cyclohexanone and an acrylate, and the other involving a nitroalkane and a nitrile under basic conditions.", "goal": "Identify the major products of the given reactions by considering steric hindrance and product stability."}, "summary": "In this problem, we are tasked with predicting the major products of two organic reactions. The first reaction involves 2-ethyl-2,6-dimethylcyclohexan-1-one reacting with ethyl acrylate in the presence of t-BuOK, leading to the formation of ethyl 3-(3-ethyl-1,3-dimethyl-2-oxocyclohexyl)propanoate. The second reaction involves 1-nitropropane reacting with (E)-but-2-enenitrile in the presence of KOH and water, resulting in 3-methyl-4-nitrohexanenitrile. The correct answer identifies these products based on steric and stability considerations."}