Search results
Results from the WOW.Com Content Network
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.
This lone pair does not overlap with the aromatic π-system ring, consequently pyridine is basic, having chemical properties similar to those of tertiary amines. Protonation gives pyridinium, C 5 H 5 NH +.The pK a of the conjugate acid (the pyridinium cation) is 5.25. The structures of pyridine and pyridinium are almost identical. [87]
First, the glomerulus filters the blood, removing small molecules, including urea, water, and electrolytes. Then the tubule returns everything but waste to the bloodstream.
Bromoantimonates can be made using a water solution of antimony tribromide, hydrobromic acid, and an amine. Alternately antimony trioxide can be used. Variants can be made without using water, and heating the antimony tribromide with an amine hydrobromide.
MORE: Details of what's in the ceasefire deal between Israel and Hamas. The identities of all the hostages being released by Hamas and Israel have yet to be made public.
Emails sent to government workers at numerous agencies gave employees 10 days to report if a colleague's job relates to diversity, equity and inclusion efforts.