Question

Which of the following is/are diastereomer pair(s)?

• A.
• B.
• C.
• D.

Answer 1

Answer: (B), (C)

The correct options are
B
C

(a) They have different connectivity of $Cl$ and $OH$. So these are structural isomers .
(b) There is inversion at only one chiral center whereas the other one has retained the configuration. Hence, these are a pair of diastereomers.
(c) They are non-superimposible and also not morror images of each other. Hence they are a pair of diastereomers.
(d) There is a change in configuration at both chiral centers. Also, there are no elements of symmetry. Hence they are a pair of enantiomers.