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Question: Answered & Verified by Expert
In the following skew conformation of ethane, H'-C-C-H dihedral angle is:
ChemistryGeneral Organic ChemistryJEE MainJEE Main 2019 (12 Apr Shift 2)
Options:
  • A 58o
  • B 120o
  • C 149o
  • D 151o
Solution:
1333 Upvotes Verified Answer
The correct answer is: 149o
The structure given in question is in staggered form. Hence, the two planes are 120° apart.
Given difference in angle of H-C-H bond is 29.
 The dihedral angle will be 120°+29°=149°

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