Explain why the C–N absorption of an amine occurs at 1020 cm^–1 while the C–N absorption of an amide occurs at 1400 cm^–1.

• A. The carbon in an amide is more electronegative than the carbon in an amine.
• B. The C–N bond in an amide has a double-bond character because of resonance effect.
• C. The carbon in an amide is sp²-hybridized while the carbon in an amine is sp-hybridized.
• D. The C–N bond in an amide is more polar than the C–N bond in an amine.

Answer: (B)