{"knowledge_schema": {"broad_category": "Chemistry \u2192 Stereochemistry \u2192 Optical Activity", "refinement": "This problem involves identifying chiral centers in organic compounds to determine if they can exhibit optical activity.", "specific_scope": "The focus is on analyzing a list of specific organic compounds to assess their chirality and potential for optical activity.", "goal": "Count the number of compounds that are chiral and can exhibit optical activity."}, "summary": "To determine how many of the given compounds exhibit optical activity, we need to identify chiral centers in each compound. A compound is optically active if it has at least one chiral center and is not superimposable on its mirror image. By analyzing the provided compounds, we can count the number of chiral compounds. The final answer will indicate how many of the listed compounds are optically active."}