{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Compound Interactions", "refinement": "This situation involves the behavior and interactions of chemical compounds during synthesis or analysis.", "specific_scope": "The chemist's statement suggests a problem related to the physical arrangement or interaction of compounds in a mixture or reaction.", "goal": "Identify the nature of the issue the chemist is facing with their compounds."}, "summary": "In this scenario, the second chemist is likely referring to an issue where their compounds are not separating properly, which can occur when compounds have similar properties that prevent them from being distinguished or isolated. The most plausible explanation is that the compounds are bonding to each other through non-covalent or van der Waals interactions, leading to them being 'on top of each other' in a physical sense."}