Is pyridine basic If yes why is it basic?

Question

Is pyridine basic If yes why is it basic?

Answer 1

Yes, it is basic, because the lone pair of the N-atom is not involved in the pi-delocalised aromatic system.

Answer 2

The nitrogen atom on pyridine features a basic lone pair of electrons. Because this lone pair is not delocalized into the aromatic pi-system, pyridine is basic with chemical properties similar to tertiary amines. The pKa of the conjugate acid is 5.21. Pyridine is protonated by reaction with acids and forms a positively charged aromatic polyatomic ion called pyridinium cation. The bond lengths and bond angles in pyridine and the pyridinium ion are almost identical[1] because protonation does not disrupt the aromatic pi system. In addition, the pyridinium cation is isoelectronic with benzene.