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Tribromide Anion
Tribromide is the anion with the chemical formula Br3−, 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. : Br− + Br2 → Br3− Tribromide may also refer to binary chemical compounds containing three bromine atoms: * Aluminium tribromide, AlBr3 * Antimony tribromide, SbBr3 * Arsenic tribromide, AsBr3 * Bismuth tribromide, BiBr3 * Boron tribromide, BBr3 * Chromium tribromide, CrBr3 * Erbium tribromide, ErBr3 * Europium tribromide, EuBr3 * Ferric tribromide, FeBr3 * Gallium tribromide, GaBr3 * Gold tribromide, AuBr3 or Au2Br6 * Indium tribromide, InBr3 * Molybdenum tribromide, MoBr3 * Nitrogen tribromide, NBr3 * Phosphorus tribromide, PBr3 * Samarium tribromide, SmBr3 * Terbium tribromide, TbBr3 * Vanadium tribromide, VBr3 * Ytterbium tribromide, YbBr3 * Yttrium tribromide Yttrium(III) bromide is an inorganic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferric Tribromide
Iron(III) bromide is the chemical compound with the formula FeBr3. Also known as ferric bromide, this red-brown odorless compound is used as a Lewis acid catalyst in the halogenation of aromatic compounds. It dissolves in water to give acidic solutions. Structure, synthesis and basic properties FeBr3 forms a polymeric structure featuring six-coordinate, octahedral Fe centers.Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. . Although inexpensively available commercially, FeBr3 can be prepared by treatment of iron metal with bromine: :2 Fe + 3 Br2 → 2 FeBr3 Above 200 °C, FeBr3 decomposes to ferrous bromide: :2FeBr3 → 2FeBr2 + Br2 Iron(III) chloride is considerably more stable, reflecting the greater oxidizing power of chlorine. FeI3 is not stable, as iron(III) will oxidize iodide ions. Uses Ferric bromide is occasionally used as an oxidant in organic chemistry, e.g. for the conversion of alcohols to ketones. It is used as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ytterbium Tribromide
Ytterbium(III) bromide ( Yb Br3) is an inorganic chemical compound. Refer to the adjacent table for the main properties of Ytterbium(III) bromide. Preparation Dissolving ytterbium oxide into 40% hydrobromic acid forms YbBr3·6H2O crystals. After mixing the hydrate with ammonium bromide Ammonium bromide, NH4Br, is the ammonium salt of hydrobromic acid. The chemical crystallizes in colorless prisms, possessing a saline taste; it sublimes on heating and is easily soluble in water. On exposure to air it gradually assumes a yellow c ... and heating it in a vacuum, anhydrous YbBr3 can be obtained.林平娣, 吴国庆无水三溴化钐和三溴化镱的制备 化学试剂, 1991(1):13-14. : Yb2O3 + 6 HBr → 2 YbBr3 + 3 H2O Ytterbium(III) bromide can also be prepared by directly heating ytterbium oxide and ammonium bromide. References Bromides Lanthanide halides Ytterbium compounds {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vanadium Tribromide
Vanadium(III) bromide, also known as vanadium tribromide, is the inorganic compound with the formula VBr3. It is a green-black solid. In terms of its structure, the compound is polymeric with octahedral vanadium(III) surrounded by six bromide ligands. VBr3 has been prepared by treatment of vanadium tetrachloride with hydrogen bromide: ::2 VCl4 + 8 HBr → 2 VBr3 + 8 HCl + Br2 The reaction proceeds via the unstable vanadium(IV) bromide (VBr4), which releases Br2 near room temperature. Like VCl3, VBr3 forms red-brown soluble complexes with dimethoxyethane and THF Tetrahydrofuran (THF), or oxolane, is an organic compound with the formula (CH2)4O. The compound is classified as heterocyclic compound, specifically a cyclic ether. It is a colorless, water-miscible organic liquid with low viscosity. It is ma ..., such as mer-VBr3(THF)3. Aqueous solutions prepared from VBr3 contain the cation ''trans''- Br2(H2O)4sup>+. Evaporation of these solutions give the salt trans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terbium Tribromide
Terbium(III) bromide ( Tb Br3) is a crystalline chemical compound. Production and properties Terbiun(III) bromide can be produced by heating terbium metal or terbium(III) oxide with ammonium bromide. : Tb2O3 + 6 NH4Br → 2 TbBr3 + 6 NH3 + 3 H2O Solution of terbium(III) bromide can crystallize its hexahydrate. When heating it, it will dehydrate and produce some TbOBr. Terbium(III) bromide is a white solid that soluble in water.CRC Handbook of Chemistry and Physics, 87th Edition, S. 4–94 It's crystal structure is same as bismuth iodide Bismuth(III) iodide is the inorganic compound with the formula Bi I3. This gray-black salt is the product of the reaction of bismuth and iodine, which once was of interest in qualitative inorganic analysis. Bismuth(III) iodide adopts a distinc .... References Bromides Terbium compounds Lanthanide halides {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samarium Tribromide
Samarium(III) bromide is a crystalline compound of one samarium and three bromine atoms with the chemical formula of SmBr3. Samarium(III) bromide is a dark brown powder at room temperature. The compound has a crystal structure isotypic to that of plutonium(III) bromide. Preparation SmBr3·6H2O can be crystallized by dissolving samarium oxide in 40% hydrobromic acid. The hydrate and ammonium chloride are heated in a vacuum to obtain the anhydrous form of samarium(III) bromide.林平娣, 吴国庆无水三溴化钐和三溴化镱的制备 化学试剂, 1991(1):13-14. Other compounds Samarium(III) bromide forms some compounds with hydrazine, such as SmBr3·3N2H4·H2O which is a pale yellow needle-shaped crystal that is soluble in water and ethanol but insoluble in benzene Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phosphorus Tribromide
Phosphorus tribromide is a colourless liquid with the formula P Br3. The liquid fumes in moist air due to hydrolysis and has a penetrating odour. It is used in the laboratory for the conversion of alcohols to alkyl bromides. Preparation PBr3 is prepared by treating red phosphorus with bromine. An excess of phosphorus is used in order to prevent formation of PBr5: :2 P + 3 Br2 → 2 PBr3 Because the reaction is highly exothermic, it is often conducted in the presence of a diluent such as PBr3. Reactions Phosphorus tribromide, like PCl3 and PF3, has both properties of a Lewis base and a Lewis acid. For example, with a Lewis acid such as boron tribromide it forms stable 1 :1 adducts such as Br3B · PBr3. At the same time PBr3 can react as an electrophile or Lewis acid in many of its reactions, for example with amines. The most important reaction of PBr3 is with alcohols, where it replaces an OH group with a bromine atom to produce an alkyl bromide. All three bromid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Tribromide
Nitrogen tribromide is a chemical compound with the formula NBr3. It is extremely explosive in its pure form, even at −100 °C, and was not isolated until 1975. It is a deep-red and volatile solid. Preparation NBr3 was first prepared by reaction of bistrimethylsilylbromamine (bis(trimethylsilyl)amine bromide) with bromine monochloride (with trimethylsilyl chloride as byproduct) at −87 °C according to the following equation: :(Me3Si)2NBr + 2 BrCl → NBr3 + 2 where "Me" is a methyl group. Reactions Nitrogen tribromide reacts instantly with ammonia in dichloromethane solution at −87 °C to yield NBrH2. :NBr3 + 2 NH3 → 3 NH2Br It also reacts with iodine in dichloromethane Dichloromethane (DCM or methylene chloride, methylene bichloride) is an organochlorine compound with the formula . This colorless, volatile liquid with a chloroform-like, sweet odour is widely used as a solvent. Although it is not miscible with ... solution at −87 °C to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molybdenum Tribromide
Molybdenum(III) bromide is the inorganic compound with the formula MoBr3. It is a black solid that is insoluble in most solvents but dissolves in donor solvents such as pyridine. Preparation Molybdenum(III) bromide is produced by the reaction of elemental molybdenum and bromine at .F. Hein, S. Herzog "Molybdenum(III) Bromide" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1407. :\mathrm It can also be prepared from the reduction of molybdenum(IV) bromide with molybdenum metal, hydrogen gas, or a hydrocarbon. It has a structure consisting of infinite chains of face-sharing octahedra with alternatingly short and long Mo-Mo contacts. The same structure is adopted by the tribromides of ruthenium and technetium.Dietrich Babel: ''Die Verfeinerung der MoBr3-Struktur (Refinement of the MoBr3-Structure)'' In: '' Journal of Solid State Chemistry.'' 1972, volume 4, S. 410–416, .Order-Disorder Transformation in RuBr3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indium Tribromide
Indium(III) bromide, (indium tribromide), InBr3, is a chemical compound of indium and bromine. It is a Lewis acid and has been used in organic synthesis. Structure It has the same crystal structure as aluminium trichloride, with 6 coordinate indium atoms."Indium: Inorganic chemistry", D.G Tuck, ''Encyclopedia of Inorganic Chemistry'' Editor R Bruce King (1994) John Wiley and Sons When molten it is dimeric, In2Br6, and it is predominantly dimeric in the gas phase. The dimer has bridging bromine atoms with a structure similar to dimeric aluminium trichloride Al2Cl6. Preparation and reactions It is formed by the reaction of indium and bromine.Egon Wiberg, Arnold Frederick Holleman (2001) ''Inorganic Chemistry'', Elsevier InBr3 forms complexes with ligands, L, InBr3L, InBr3L2, InBr3L3. Reaction with indium metal forms lower valent indium bromides, InBr2, In4Br7, In2Br3, In5Br7, In7Br9, indium(I) bromide Indium(I) bromide is a chemical compound of indium and bromine. It is a red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gold(III) Bromide
Gold(III) bromide is a dark-red to black crystalline solid.Macintyre, J. E. (ed.) ''Dictionary of Inorganic Compounds''; Chapman & Hall: London, 1992; vol. 1, pp. 121Greenwood, N.N.; Earnshaw, A. ''Chemistry of the Elements''; Butterworth-Heineman: Oxford,1997; pp. 1183-1185Cotton, F.A.; Wilkinson, G.; Murillo, C.A.; Bochmann, M. ''Advanced Inorganic Chemistry''; John Wiley & Sons: New York, 1999; pp. 1101-1102 It has the empirical formula , but exists primarily as a dimer with the molecular formula in which two gold atoms are bridged by two bromine atoms.Schulz, A.; Hargittai, M. ''Chem. Eur. J.'' 2001, vol. 7, pp. 3657-3670 It is commonly referred to as gold(III) bromide, gold tribromide, and rarely but traditionally auric bromide, and sometimes as digold hexabromide. As is similar with the other gold halides, this compound is unique for being a coordination complex of a group 11 transition metal that is stable in an oxidation state of +3 whereas copper or silver complexes per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallium Tribromide
Gallium(III) bromide ( Ga Br3) is a chemical compound, and one of four gallium trihalides. Introduction Gallium(III) bromide is, at room temperature and atmospheric pressure, a white, crystalline powder which reacts favorably and exothermically with water. Solid gallium tribromide is stable at room temperature and can be found primarily in its dimeric form. GaBr3 can form an intermediate halide, Ga2Br7; however, this is not as common as with GaCl3. It is a member of the gallium trihalide group and is similar to GaCl3, and GaI3, but not GaF3, in its preparation and uses. GaBr3 is a milder Lewis acid than AlBr3, and has more versatile chemistry due to the comparative ease of reducing gallium, but is more reactive than GaCl3. GaBr3 is similar spectroscopically to aluminum, indium, and thallium trihalides excluding trifluorides. Preparation One method of preparing GaBr3 is to heat elemental gallium in the presence of bromine liquid under vacuum. Following the highly exothermic r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
