Asked by Meenaakshi

How many stereoisomers are there for 1,2-dichlorocyclopentane?

The answer options are 1,2,3 & 4. I think it is 4 because there is one cis & one trans isomer,so when using the 2^n formula,the final answer is 2^2 =4.Is my approach correct?
Need ur help Dr.Bob.Thanks



Answered by bobpursley
No. The trans isomers of 1,2-dichlorocyclopentane are enantiomeric and are therefore different compounds. Cis-1,2-dichloropentane contains a plane of symmetry. It is superimposable on its mirror image. It follows then that cis-(1R,2S)-1,2-dicholorocyclopentane and cis-(1S,2R)-1,2-dichlorocyclopentane are identical and that cis-1,2-dichloropentane is thus a meso compound.
There are three stereoisomers of 1,2-dichlorocyclopentane
Answered by Meenaakshi
Ok thank you Dr.Bob
Answered by Anjali
Three
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