Chemistry - STEREO ISOMERISM Question with Solution | TestHub
ChemistrySTEREO ISOMERISMELEMENT OF SYMMETRYMedium2 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:
A
Solution:
Ans. (A) A - identical, B - enantiomer, C - diastereomer, D - identical.
Sol. The top structure is trans-cyclohexane-1,3-diol, which is chiral (it has no plane or centre of symmetry).
A: rotating the top structure by 60 degrees in the plane of the paper superposes it exactly on A : identical.
B: both stereocentres are inverted relative to the top structure : enantiomer.
C: one centre matches and the other is inverted (cis-1,3-diol) : diastereomer.
D: rotating the top structure by 60 degrees the other way superposes it on D : identical.
Stream:JEESubject:ChemistryTopic:STEREO ISOMERISMSubtopic:ELEMENT OF SYMMETRY
⏱ 2mℹ️ Source: QB
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