In this diagram optical isomers has divided in to 2 categories, one is diastereomers and enantiomers. Is the example for diastereomers correct? For me its looks like enantiomers isomers flowchart

  • $\begingroup$ What do you think? $\endgroup$
    – user55119
    Nov 27, 2021 at 3:21
  • $\begingroup$ Are the carbons bearing the Br the same?. What about the carbons bearing Cl? $\endgroup$
    – user55119
    Nov 27, 2021 at 3:27

1 Answer 1


I'm not sure why you think they are enantiomers. They are actuallually diastereomers as stated:


As depicted, the compound to the left is $(2R,3S)$- while the compound to the right is $(2R,3R)$-. Thus, they are pair of diastereomers.

To be enantiomers, either the compound to the left should be $(2S,3S)$- or the compound to the right should be $(2S,3R)$-.


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