Ferric bromide

For ammonium bromide, another method involving reaction of an aqueous bromine solution and Hon filings has been used. The solution of ferrous and ferric bromide thus formed then reacts with ammonia to precipitate hydrated oxides of Hon. Ammonium bromide can be recovered by crystallization from the concentrated Hquor. 

Iron(lll) bromide (FeBr3> is also called ferric bromide. 

Feiri-. ferric, ferri-, iron(III). -acetat, n. ferric acetate, iron(IIl) acetate, -ammonsulfat, n. ammonium ferric sulfate, -bromid, n. ferric bromide, iron(III) bromide, -chlorid, n. ferric chloride, iron(lll) chloride, -chlor-wasserstoff, -chlorwasserstoffsMure, /. fer-richloric acid. -cyan, n. ferricyanogen. -cyaneisen, n. ferrous ferricyanide (Turn-bull s blue), -cyanid, n. ferric cyanide, iron(III) cyanide ferricyanide. 

Chlorine and Bromine. Aromatic compounds can be brominated or chlorinated by treatment with bromine or chlorine in the presence of a catalyst, most often iron. However, the real catalyst is not the iron itself, but the ferric bromide or ferric chloride formed in small amounts from the reaction... 

For preparative reactions, Lewis acid catalysts are used. Zinc chloride or ferric chloride can be used in chlorination, and metallic iron, which generates ferric bromide, is often used in bromination. The Lewis acid facilitates cleavage of the halogen-halogen bond. 

Chlorobromobenzene has been prepared by the diazotiza-tion of o-bromoaniline followed by replacement of the diazonium group by chlorine 1 by the elimination of the amino group from 3-chloro-4-bromoaniline 2 by the chlorination of bromobenzene in the presence of thallous chloride,3 aluminum chloride,4 or ferric chloride 4 by the bromination of chlorobenzene without a catalyst6 or in the presence of aluminum,4 iron,4 or ferric bromide 6 by the diazotization of o-chloroaniline followed by replacement of the diazonium group with bromine 4,6 and from o-chlorophenylmercurie chloride by the action of bromine.7... 

NaBr sodium bromide FeBr3 iron(III) bromide or ferric bromide... 

Dow bromine An electrolytic process for extracting bromine from brines. Ferric bromide was an intermediate. Developed by H. H. Dow, founder of the Dow Chemical Company. 

Ferric ammonium citrate molecular formula, 6 6381 solubility in water, 6 649t Ferric ammonium ferrocyanide pigment used in makeups, 7 836t Ferric bromide, physical properties of,... 

The other interesting reaction is the decomposition of ferric bromide ions... 

NH4Br is also made by the reaction of ammonia with ferrous and ferric bromide, which may be obtained by passing aqueous bromine solution over iron filings. 

Formula FeBrs MW 295.56 Synonym ferric bromide iron tribromide... 

Exercise 22-14 Aluminum chloride is a much more powerful catalyst than ferric bromide for bromination of benzene. Would you expect the combination of aluminum chloride and bromine to give much chlorobenzene in reaction with benzene Explain. 

An electrophile — an electron-seeking reagent — is generated. For the bromination of benzene reaction, the electrophile is the Br+ ion generated by the reaction of the bromine molecule with ferric bromide, a Lewis acid. 

A still more powerful brominating agent is the free Br+ ion, which is probably formed in the presence of ferric bromide used as a bromination catalyst ... 

Addition of a catalyst such as ferric bromide to the mixture of bromine and benzene causes the bromine color to disappear slowly. HBr gas is evolved as a by-product, but the expected addition of Br2 does not take place. Instead, the organic product results from substitution of a bromine atom for a hydrogen, and all three double bonds are retained. 

Shown next is the reaction of ethylbenzene with bromine, catalyzed by ferric bromide. As with toluene, the rates of formation of the ortho- and para-substituted isomers are gready enhanced with respect to the meta isomer. 

Ferric bromide, FeBr3i Acts as a catalyst for the reaction of arenes with Br2 to yield bromoarenes (Section 16.1). 

Auric bromide, AuBr3.—The bromide is formed in aqueous solution by the action of water on gold dibromide.14 It can be obtained in the solid state from the same source by the action of moist ether, the aurous bromide formed remaining undissolved, and auric bromide being left on evaporation of the dried ether solution. It is also produced by the interaction of aqueous bromine and gold,16 as well as by the action of solutions of such perbromides as cobalt tribromide, manganese tetrabromide, and ferric bromide on the metal.16 The aqueous solution and the crystals deposited from it have a scarlet-red colour, but the pure salt contained from solution in ether is a dark-brown... 

Ferric bromide, FeBr3, results when iron is heated in excess of... 

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