Q3 · CSIR-NET Chemistry, December 2018
Paper: CSIR-NET December 2018 · Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Stereochemistry R S E Z · Marks: 2 · Difficulty: Medium
Among the following, the optically active compound is
(a)
(b)
(c)
(d)
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Only trans-1,2-disubstituted cyclobutane (d, one wedge and one hashed bond on adjacent carbons) lacks a plane of symmetry and is chiral; cis-1,2 (a) is meso and both 1,3 isomers (b, c) have mirror planes.
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