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Pyridinium perbromide (also called pyridinium bromide perbromide, pyridine hydrobromide perbromide, or pyridinium tribromide) is an organic chemical composed of a pyridinium cation and a tribromide anion. It can also be considered as a complex containing pyridinium bromide—the salt of pyridine and hydrogen bromide—with an added bromine (Br ...
Pyridinium refers to the cation [C 5 H 5 NH] +. It is the conjugate acid of pyridine . Many related cations are known involving substituted pyridines, e.g. picolines, lutidines, collidines.
Tribromide is the anion with the chemical formula Br 3 −, or salts containing it: . Tetrabutylammonium tribromide; Tetrabromophosphonium tribromide; Pyridinium perbromide; Sodium and potassium tribromides can be prepared by reacting NaBr or KBr with aqueous bromine.
The pyridinium cation is isoelectronic with benzene. Pyridinium p - toluenesulfonate (PPTS) is an illustrative pyridinium salt; it is produced by treating pyridine with p -toluenesulfonic acid . In addition to protonation , pyridine undergoes N-centred alkylation , acylation , and N -oxidation .
Properties Chemical formula. C 12 H 13 N O 3 S: Molar mass: 251.30 g·mol −1 Appearance Colourless solid Melting point: ... Pyridinium p-toluenesulfonate (PPTS) ...
Pages in category "Pyridinium compounds" The following 37 pages are in this category, out of 37 total. ... Pyridinium perbromide; Pyridostigmine; Q. Quinolizinium; R.
Pyrylium salts afford pyridines with ammonia, [16] pyridinium salts with primary amines, pyridine-N-oxides with hydroxylamine, phosphabenzenes with phosphine derivatives, thiopyrylium salts with hydrogen sulfide, and benzene derivatives with acetonitrile or nitromethane.
Density: 1.640 g/cm 3: Melting point: −27 Boiling point: 173 °C (343 °F; 446 K) Hazards GHS labelling: Pictograms. Signal word. Danger: Hazard statements.