Question

Pyridine is weaker base than pipredine.why?

Answer 1

Answer:

Pyridine is a substantially weaker base than alkylamines such as piperidine. The electron pair of pyridine occupies an sp2-hybridized orbital and lies closer to the nucleus than the electron pair in the sp3-hybridized orbital of alkylamines. ... Pyrrolidine, which is not aromatic, is a much stronger base.

Explanation:

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Answer 2

Answer:

Nice question

Explanation:

In pyrimidine, the nitrogen atoms are equivalent and sp2 hybridized. Both electron pairs lie outside the aromatic ring on sp2 hybrid orbitals. Both N are slightly basic. Pyrimidine is less basic than pyridine because of the inductive, electron-withdrawing effect of the second N atom.

While in piperidine the nitrogen is sp3 where no attraction is working and hence, it easily gives its lone pair. Basicity is the degree to which the atom can donate lone pair. So more donating, more basic; less donating, less basic. Hence, pyridine is less basic than piperidine.

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