Guess what you have to draw to answer the problem ?

3.56 An amide is typically drawn with a single bond connecting the carbonyll atom to the Natom. If this representation were accurate, we would expect the N atom to be pyramidal, and we would also expect C-N to undergo free rotation. In actuality, however, the N atom is rather planar, and the rotation is quite hindered-properties that give rise to important secondary structures of proteins, such as a helices and B sheets (Chapter 26). Explain these properties of the amide. NH Anamide