COMPASSLearning
RegisterLogin

JEE Main · 2022 · 25 Jun 2022 · Shift 1 · General Organic Chemistry

WhatsApp Email
In the following structures, which one is having staggered conformation with maximum dihedral angle?
  1. (A)(see structure)
  2. (B)(see structure)
  3. (C)(see structure)
    ✓ Correct
  4. (D)(see structure)

Answer: (C)

Solution

The dihedral angle is the angle between two specified groups (in this case, the two groups) when viewed along a C-C bond in a Newman projection.

In a staggered conformation, the maximum dihedral angle is 180°, which occurs when the two groups are anti to each other (opposite sides).

Examining the structures:
  • Option (C) shows a staggered conformation where the two methyl groups are positioned at a dihedral angle of 180° (anti-periplanar arrangement).

This is the maximum possible dihedral angle in a staggered conformation.

The answer is (C).

JEE Main · 2022 · 25 Jun 2022 · Shift 1 · Single correct option

Practise more: all JEE Main PYQs on General Organic Chemistry →

More JEE Main questions on General Organic Chemistry

  1. From the following, the least stable structure is:
    JEE Main 2026View solution →
  2. Identify correct statement from the following:

    A. Propanal and propanone are functional isomers.
    B. Ethoxyethane and methoxypropane are metamers.
    C. But-2-ene shows optical isomerism.
    D. But-1-ene and but-2-ene are functional isomers.
    E. Pentane and 2, 2-dimethyl propane are cha …
    JEE Main 2026View solution →
  3. Match List-I with List-II.

    List-I (Pair of Compounds):
    A. 2-Methylpropene and but-1-ene
    B. Cis-but-2-ene and trans-but-2-ene
    C. 2-Butanol and diethyl ether
    D. But-1-ene and but-2-ene

    List-II (Type of Isomers):
    I. Stereoisomers
    II. Position isomers
    III. Chain isomers
    IV. Functio …
    JEE Main 2026View solution →
  4. Given below are two statements:

    Statement-I: Compound (X), shown below, dissolves in solution and has two chiral carbon atoms

    Statement-II: Compound (Y), shown below, has two carbons with hybridization, one carbon with an …
    JEE Main 2026View solution →
  5. The IUPAC name of the following comopound is :
    JEE Main 2026View solution →
  6. Consider all the structural isomers with molecular formula are separately treated with KOH (aq) to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is ____ .
    JEE Main 2026View solution →