answer the problem in the photo and explain the answers thoroughly. you. Transcribed Image Text: In x-ray studies of crystalline peptides, Linus Pauling and Robert Corey found that the C-

answer the problem in the photo and explain the answers thoroughly. you. Transcribed Image Text: In x-ray studies of crystalline peptides, Linus Pauling and Robert Corey found that the C-
N bond in the peptide link is intermediate in length (1.32 Å) between a typical C-N single
bond (1.49 Å) and a C=N double bond (1.27 Å). They also found that the peptide bond is
planar (all four atoms attached to the C-N group are located in the same plane) and that the
two a- carbon atoms attached to the C-N are always trans to each other (on opposite sides
of the peptide bond):
H)
(a) does the length of the C-N bond in the peptide linkage indicate about its
strength and its bond order (i.e., whether it is single, double, or triple)?
(b) do the observations of Pauling and Corey tell us about the ease of rotation
about the C-N peptide bond?