Q14 · CSIR NET Chemistry, December 2019
Paper: CSIR NET December 2019 · Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Conformational Analysis · Marks: 2 · Difficulty: Medium
The correct statement about for the orientation of the bromine atoms in the most stable conformations of A and B is 
A B
A B(a)Axial in both A and B
(b)Axial in A and equatorial in B
(c)Equatorial in both A and B
(d)Equatorial in A and axial in B
Answer
Answer: B ✓ checked by 4AB · confidence medium
Explanation
In A the two methyls are cis-1,3, so both take equatorial positions and the Br on the substituted carbon is forced axial. In B the methyls are trans-1,2 diequatorial and the Br can also be equatorial (b).
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