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R, S-configuration is a useful tool for ...

R, S-configuration is a useful tool for determination of enantiomers, diastereomers and homomers. If configuration of all chiral centres are opposite then structures are enantiomers, if all chiral centers have same configuration then they are homomers and if some have same configuration and some have opposite configuration then they are diastereomers.

Which of the following is not diastereomer?

A

I and III

B

II and III

C

III and IV

D

II and IV

Text Solution

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The correct Answer is:
D
II and IV
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R, S-configuration is a useful tool for determination of enantiomers, diastereomers and homomers. If configuration of all chiral centres are opposite then structures are enantiomers, if all chiral centers have same configuration then they are homomers and if some have same configuration and some have opposite configuration then they are diastereomers. Find out homomers:

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