MolSynapsequestion bank
MolSynapse / Question bank / Stereoisomerism / Diastereomers, meso compounds and counting stereoisomers
JEE Advanced levelOne or more correct optionsDifficulty 3 of 3st076

Which of the following compounds have exactly three stereoisomers? Treat rings as planar for counting.

  1. A
  2. B1,3-dichlorocyclobutane
  3. C
  4. D1,2-dimethylcyclopropane

Answer: A, C, D

Hexa-2,4-diene has EE, ZZ and EZ, so 3. 1,3-Dichlorocyclobutane has only cis and trans, both achiral, so 2. 2,4-Dichloropentane has (R,R), (S,S) and meso, so 3. 1,2-Dimethylcyclopropane has the meso cis form and the trans enantiomeric pair, so 3. The answers are the first, third and fourth.
Practice Stereoisomerism More on Diastereomers, meso compounds and counting stereoisomers
Previous questionNext question

More questions on Diastereomers, meso compounds and counting stereoisomers