Question

Dihedral angle in staggered form of ethane is :

• A. 60$^{\circ}$
• B. 180$^{\circ}$
• C. 0$^{\circ}$
• D. 120$^{\circ}$

Answer 1

Answer: (A)

60$^{\circ}$

Answer 2

Staggered form is produced when rearrangement of $-CH_3$ groups is rotated by an angle of 60$^{\circ}$ over front arrangement of -CH$_3$ group and minimise repulsion and increase the stability