Tags: Chemical Compound, Chemical Substance.
Pyridinium refers to the cationic form of pyridine. This can either be due to protonation of the ring nitrogen or because of addition of a substituent to the ring nitrogen typically via alkylation. The lone pair of electrons on the nitrogen atom of pyridine is not delocalized and thus pyridine can be protonated easily. Pyridine is often used as an organic base in chemical reactions thus the pyridinium ion is produced as the counter ion to the leaving group in the reaction.
