{"knowledge_schema": {"broad_category": "Chemistry \u2192 Stereochemistry \u2192 Meso Compounds", "refinement": "This problem involves identifying a meso compound among a list of stereoisomers based on their chirality and symmetry.", "specific_scope": "The focus is on the specific compounds given, which are stereoisomers of 2,3-dibromobutane and 2-butanol, and determining which one exhibits internal symmetry that makes it achiral despite having chiral centers.", "goal": "Identify the meso compound from the provided candidates by analyzing their stereochemistry."}, "summary": "In this problem, we are tasked with identifying which of the given compounds is meso, meaning it has multiple stereocenters but is achiral due to internal symmetry. The candidates include different stereoisomers of 2,3-dibromobutane and 2-butanol. To determine the meso compound, we need to analyze the chirality of each compound and check for symmetry. The correct answer is (2R,3S)-2,3-dibromobutane, as it has a plane of symmetry that makes it achiral."}