hard · MCAT chem-phys

Which of the following describes the relationship between the (2R, 3S)-2,3-dibromobutane isomer and its (2S, 3R) mirror image?

  1. They are the same molecule due to an internal mirror plane
  2. They are a pair of enantiomers that rotate light in opposite directions
  3. They are diastereomers with different boiling points
  4. They are constitutional isomers with different connectivity

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