Noun
pyridinium (plural pyridiniums)
(organic chemistry) The cationic, protonated form of pyridine
The reaction of pyridine with α- bromoesters give the related pyridinium salt, wherein the methylene group is highly acidic. Source: Internet
It is especially suitable for the dehalogenation, where it acts as the base of the elimination reaction and bonds the resulting hydrogen halide to form a pyridinium salt. Source: Internet
Joule, pp. 125–141 Reactions on the nitrogen atom Additions of various Lewis acids to pyridine Lewis acids easily add to the nitrogen atom of pyridine, forming pyridinium salts. Source: Internet
The bond lengths and bond angles in pyridine and pyridinium are almost identical. citation The pyridinium cation is isoelectronic with benzene. Source: Internet
The proton donor is a pyridinium salt of weakly coordinating counter anion. Source: Internet
The Zincke reaction is used for the selective introduction of radicals in pyridinium compounds (it has no relation to the chemical element zinc ). Source: Internet