Pyridine Properties

Pyridine can be classified as a heterocyclic ambrosial amoebic compound. Each atom of pyridine is a six-membered ring accompanying to the anatomy of benzene—one CH accumulation in the benzene ring is replaced by a nitrogen atom.

Pyridine has a abandoned brace of electrons at the nitrogen atom. Because this abandoned brace is not delocalized into the ambrosial arrangement of "pi" electrons, pyridine is basic, with actinic backdrop agnate to those of tertiary amines.

Pyridine is protonated by acknowledgment with acids and forms a absolutely answerable ambrosial polyatomic ion called a pyridinium cation. This cation is the conjugate acid of pyridine and its pKa has a amount of 5.30.

The band lengths and band angles in pyridine and the pyridinium ion are about identical. This is because protonation of pyridine does not affect the ambrosial pi system.

The anatomy of the pyridine atom makes it polar. It is appropriately a arctic but aprotic solvent. It is absolutely miscible with a ample ambit of added solvents, including hexane and water.