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Question
Which of the following are diastereomers?
Which of the following are diastereomers?
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Solution
The correct options are
A
B
Obviously, geometrical isomers are diastereomers. Hence the following are diastereomers: 
and 
are both
Let us take this compound:
I want you to find out the IUPAC name with the R/S information. 
Now take its mirror image and give me the configuration:
Hence the above two are enantiomers and by definition cannot bediastereomers!
Now what can you say about
Again, these two are a pair of enantiomers. So they can’t be diastereoisomers.
A
B
Obviously, geometrical isomers are diastereomers. Hence the following are diastereomers:
and are bothLet us take this compound:
I want you to find out the IUPAC name with the R/S information.
Now take its mirror image and give me the configuration:
Hence the above two are enantiomers and by definition cannot bediastereomers!
Now what can you say about
Again, these two are a pair of enantiomers. So they can’t be diastereoisomers.
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