{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Index of Hydrogen Deficiency (IHD)", "refinement": "This problem involves calculating the index of hydrogen deficiency for a specific organic compound after a chemical reaction.", "specific_scope": "The focus is on the product formed from the reaction of 2-formyl-5-vinylcyclohex-3-enecarboxylic acid with red phosphorus and excess HI, which typically leads to the saturation of double bonds and the formation of a new compound.", "goal": "Determine the index of hydrogen deficiency (IHD) of the resulting product to understand its degree of unsaturation."}, "summary": "This problem requires calculating the index of hydrogen deficiency (IHD) for a product formed from a specific organic reaction. The reaction involves 2-formyl-5-vinylcyclohex-3-enecarboxylic acid with red phosphorus and excess HI, which typically results in the saturation of double bonds. The goal is to determine the IHD of the resulting compound, which indicates the number of rings and/or multiple bonds present. The answer to this calculation is 1, indicating one degree of unsaturation in the product."}