e/Pyridinium

Information
has gloss	eng: 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. This complex is often insoluble in the organic solvent, so precipitation of the pyridinium leaving group complex is an indication of the progress of the reaction. The pyridinium ion also plays a role in Friedel-Crafts acylation. When pyridine is included, it forms a complex with the electrophillic acylium ion, rendering it even more reactive.
lexicalization	eng: pyridinium
instance of	e/Ion#Ions

Meaning
French
has gloss	fra: Lion pyridinium est lacide conjugué de la pyridine. Il sagit dun cation ayant pour formule brute C5H5NH+. La charge positive est portée par latome dazote. Le pKa du couple pyridinium / pyridine est de 5,23.
lexicalization	fra: ion pyridinium
Dutch
has gloss	nld: Een pyridiniumion is de kationische vorm van pyridine. Pyridiniumionen kunnen ontstaan door protonering van pyridine. Door alkylering van pyridine zelf kunnen gesubstitueerde pyridiniumionen(alkylpyridiniumionen) ontstaan. Pyridiniumzouten zijn zouten die een pyridiniumion bevatten. Het pyridinium-ion is iso-elektronisch met benzeen.
lexicalization	nld: pyridinium

Media
media:img	Alkylpyridium halogenide preparation.svg
media:img	Pyridinium.svg
media:img	Pyridium-ion.png