JEE Main201912 Apr 2019Evening ShiftChemistryGeneral Organic ChemistryActual
In the following skew conformation of ethane, H ' - C - C - H ″ dihedral angle is:
Options
- A58 o
- B120 o
- C149 o
- D151 o
Correct answer
C. 149 o
Step-by-step solution
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 . ∴   T h e   d i h e d r a l   a n g l e   w i l l   b e   120 ° + 29 ° = 149 °