explain-why-the-c-n-absorption-of-an-amine-occurs-at-1020-cm-while-the-c-n-absor

Question

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 $$cm^{–1}.$$

Accepted Answer

The C–N bond in an amide has a double-bond character because of resonance effect.

Answer

The carbon in an amide is more electronegative than the carbon in an amine.

Answer

The carbon in an amide is $$sp^{2}-$$hybridized while the carbon in an amine is sp-hybridized.

Answer

The C–N bond in an amide is more polar than the C–N bond in an amine.

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.