In the amide group, rotation is restricted about the CON bond, so that the C, N, and

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In the amide group, rotation is restricted about the CON bond, so that the C, N, and O atoms in that group are normally in the same plane. This rigidity is partly responsible for the secondary structure of proteins. The amino acid glycine can form a dipeptide, composed of two glycine monomers.

(a) Draw the Lewis structure of the glycine dipeptide.

(b) Explain how resonance structures can account for the restricted rotation and draw a second resonance structure for the dipeptide.

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Chemical Principles The Quest For Insight

ISBN: 9781464183959

7th Edition

Authors: Peter Atkins, Loretta Jones, Leroy Laverman

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