Question

In the following skew conformation of ethane, $H^{\prime }-C-C-H^{\prime \prime }$ dihedral angle is :

• A. $120^{\circ }$
• B. $58^{\circ }$
• C. $149^{\circ }$
• D. $151^{\circ }$

Answer 1

Answer: (C)

$H^{\prime }-C-C-H"$
Hence angle between $H^{\prime }—C-C-H^{\prime \prime }$ is
$(120^{\circ }+29^{\circ })=149^{\circ }$