Question

The dihedral angle in staggered form of 1,1,1-Trichloro ethane is ________ degree. (Round off to the Nearest Integer).

Hint:

For any ethane-like molecule (X$_3$C-CY$_3$), the staggered conformation is the most stable, and the dihedral angle between adjacent substituents is always 60°. The eclipsed conformation is the least stable, with a dihedral angle of 0°.

Answer 1

Correct Answer: 60

The dihedral angle in organic chemistry refers to the angle between planes formed by bonded groups. For staggered conformation, which is the most stable arrangement, the dihedral angle between substituents is typically 60 degrees. This stability arises due to minimized steric hindrance and electron repulsion.
In the case of 1,1,1-Trichloroethane (C₂H₅Cl₃), the staggered form maintains this dihedral angle of 60 degrees. Thus, the dihedral angle in the staggered form of 1,1,1-Trichloroethane is 60 degrees. This value fits precisely in the expected range of 60,60.