question_answer

In the figure below, the plane drawn behind the peptide bond indicates the

A)  absence of rotation around\[C-N\]bond because of its partial double bond character

B)  plane of rotation around the\[C-N\]bond

C)  region of steric hindrance determined by the large\[C=O\]group

D)  None of the above    

Correct Answer: A

Solution :

  This resonance restricts the rotation around \[C-N\]bond.