{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Compound Interactions", "refinement": "This problem involves understanding the behavior of chemical compounds in relation to their physical properties, particularly polarity.", "specific_scope": "The context is a synthetic organic chemistry lab where chemists are discussing the challenges faced during compound synthesis or separation.", "goal": "Identify the reason for the chemist's statement about compounds being 'on top of each other' and relate it to the properties of the compounds."}, "summary": "In this scenario, the second chemist's comment about compounds being 'on top of each other' likely refers to the issue of similar polarities among the compounds they are working with. When compounds have similar polarities, they may not separate effectively during processes like extraction or chromatography, leading to difficulties in isolating the desired compounds. Understanding the relationship between polarity and compound behavior is crucial in organic chemistry."}