# Chapter 25q: Chapter Quiz

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Amines Chapter Quiz

Exercise $$\PageIndex{1}$$

Which molecule in each of the following pairs of amines is more basic? Explain why.

Ethanamine is a stronger base because it's lone pair of electrons is available to react. In aniline, the electron pair is partially tied up in resonance and less available.

Pyridine is a stronger base because it's lone pair of electrons is available to react. The electron pair cannot be involved in the ring resonance since it is in an sp2 hybrid orbital that is perpendicular to the ring. In aniline, the electron pair is partially tied up in resonance and less available.

Pyrrolidine is a stronger base because it's lone pair of electrons is available to react. The lone pair of electrons on pyrrole will be in a p-orbital. This will make the molecule aromatic (6 pi electrons in the ring). If these electrons acted as a base to make a new bond to H, the molecule would lose aromaticity.

Exercise $$\PageIndex{2}$$

Show using resonance structures why amines are much more basic than amides.