Chemistry · Covalent bond fission: Homolytic and heterolytic, free radicals, carbocations and carbanions, stability of carbocations and free radicals, electrophiles and nucleophiles

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

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

Step-by-step solution

The peptide bond has partial double bond character due to resonance between the C=O and C-N bonds. This restricts free rotation around the C-N bond, forcing the atoms (C, O, N, H) into a planar structure. The plane drawn behind the peptide bond in the figure indicates this planar arrangement and the lack of rotation.
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