Chemistry - STEREO ISOMERISM Question with Solution | TestHub
ChemistrySTEREO ISOMERISMABSOLUTE AND RELATIVE CONFIGURATIONMedium2 minQB
ChemistryMediumsingle choice
Indicate whether each of the structures in the second row is an enantiomer of, is a diastereomer of, or is identical to the structure in the top row.
(A) 
(B) 
(C) 
(D)
Options:
Answer:
B
Solution:
The top structure is trans-1,2-dimethylcyclopropane, (1R,2R), which is chiral.
A: the same trans isomer redrawn (ring numbered from the other carbon) - same configuration at both centres : identical.
B: both centres inverted, (1S,2S) - the non-superimposable mirror image : enantiomer.
C: cis-1,2-dimethylcyclopropane, (1R,2S) meso - one centre retained, one inverted : diastereomer.
D: same (1R,2R) drawing as the top structure : identical.
Ans. (B) A - identical, B - enantiomer, C - diastereomer, D - identical.
Stream:JEESubject:ChemistryTopic:STEREO ISOMERISMSubtopic:ABSOLUTE AND RELATIVE CONFIGURATION
⏱ 2mℹ️ Source: QB
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