MolSynapsequestion bank
MolSynapse / Question bank / Stereoisomerism / Diastereomers, meso compounds and counting stereoisomers
JEE Main levelOne or more correct optionsDifficulty 2 of 3st071

Which of the following statements about the stereoisomers of 2,3-dibromobutane are correct?

  1. AOne stereoisomer is optically inactive.
  2. BTwo stereoisomers are enantiomers of each other.
  3. CThe meso isomer is a diastereomer of each of the other two.
  4. DAll three stereoisomers have the same magnitude of specific rotation under identical conditions.

Answer: A, B, C

The stereoisomers are (2R,3R), (2S,3S) and meso. The meso form is achiral, so it is optically inactive. (R,R) and (S,S) are non-superimposable mirror images, so they are enantiomers. Meso relates to each of them as a diastereomer. The meso form has zero rotation, so the last statement is false.
Practice Stereoisomerism More on Diastereomers, meso compounds and counting stereoisomers
Previous questionNext question

More questions on Diastereomers, meso compounds and counting stereoisomers