JEE Main 2022 · 25 Jun · Shift 1 · Chemistry Q72

ChemistrySingle correct+4 / -1Question 72 of 90

In the following structures, which one is having staggered conformation with maximum dihedral angle ?

Newman projection (A) of butane: staggered, CH₃ groups 60° apart (gauche)

Newman projection (B) of butane: eclipsed, CH₃ groups 120° apart

Newman projection (C) of butane: staggered, CH₃ groups 180° apart (anti)

Newman projection (D) of butane: eclipsed, CH₃ groups 0° apart (fully eclipsed)

Answer and worked solution

Official answer: C

Dihedral angle between the CH₃ groups. (A) staggered, 60° (gauche); (B) eclipsed, 120°; (C) staggered, 180° (anti); (D) eclipsed, 0°.

Staggered with the largest angle: (C).

(C)

Topics:Conformations

JEE Main 2022 · 25 Jun · Shift 1, Chemistry question 72