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Tribromide
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: * Actinium tribromide, AcBr3 * Aluminium tribromide, AlBr3 * Americium tribromide, AmBr3 * Antimony tribromide, SbBr3 * Arsenic tribromide, AsBr3 * Berkelium tribromide, BkBr3 * Bismuth tribromide, BiBr3 * Boron tribromide, BBr3 * Californium tribromide, CfBr3 * Cerium tribromide, CeBr3 * Chromium tribromide, CrBr3 * Curium tribromide, CmBr3 * Dysprosium tribromide, DyBr3 * Einsteinium tribromide, EsBr3 * Erbium tribromide, ErBr3 * Europium tribromide, EuBr3 * Ferric tribromide, FeBr3 * Gadolinium tribromide, GdBr3 * Gallium tribromide, GaBr3 * Gold tribromide, AuBr3 or Au2Br6 * Holm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Tribromide Anion
Tribromide is the anion with the chemical formula Br3−, or salt (chemistry), salts containing it: * Tetrabutylammonium tribromide * Phosphorus heptabromide, 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: * Actinium tribromide, AcBr3 * Aluminium tribromide, AlBr3 * Americium tribromide, AmBr3 * Antimony tribromide, SbBr3 * Arsenic tribromide, AsBr3 * Berkelium tribromide, BkBr3 * Bismuth tribromide, BiBr3 * Boron tribromide, BBr3 * Californium tribromide, CfBr3 * Cerium tribromide, CeBr3 * Chromium tribromide, CrBr3 * Curium tribromide, CmBr3 * Dysprosium tribromide, DyBr3 * Einsteinium tribromide, EsBr3 * Erbium tribromide, ErBr3 * Europium tribromide, EuBr3 * Ferric tribromide, FeBr3 * Gadolinium tribromide, GdBr3 * Gallium tribromide, GaBr3 * Gold tribromide, A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boron Tribromide
Boron tribromide, BBr3, is a colorless, fuming liquid compound containing boron and bromine. Commercial samples usually are amber to red/brown, due to weak bromine contamination. It is decomposed by water and alcohols. Chemical properties Boron tribromide is commercially available and is a strong Lewis acid. It is an excellent demethylating or dealkylating agent for the cleavage of ethers, also with subsequent cyclization, often in the production of pharmaceuticals. The mechanism of dealkylation of tertiary alkyl ethers proceeds via the formation of a complex between the boron center and the ether oxygen followed by the elimination of an alkyl bromide to yield a dibromo(organo)borane. :ROR + BBr3 → RO+(−BBr3)R → ROBBr2 + RBr Aryl methyl ethers (as well as activated primary alkyl ethers), on the other hand are dealkylated through a bimolecular mechanism involving two BBr3-ether adducts. :RO+(−BBr3)CH3 + RO+(−BBr3)CH3 → RO(−BBr3) + CH3Br + R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Gold Tribromide
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 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. The analogous copper or silver tribromides do not exist.Schwerdtfeger, P. ''J. Am. Chem. Soc.'' 1989, vol. 111, pp. 7261-7262 History The first mention of any research or study of the gold halides dates back to the early-to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Bismuth Tribromide
Bismuth tribromide is an inorganic compound of bismuth and bromine with the chemical formula BiBr3. Preparation It may be formed by the reaction of bismuth oxide and hydrobromic acid. : Bismuth tribromide can also be produced by the direct oxidation of bismuth in bromine. : Structure Bismuth tribromide adopts two different structures in the solid state: a low-temperature polymorph α-BiBr3 that is stable below 158 °C and a high-temperature polymorph β-BiBr3 that is stable above this temperature. Both polymorphs are monoclinic, but α-BiBr3 is in space group ''P''21/a whereas β-BiBr3 is in ''C''2/m. α-BiBr3 consists of pyramidal molecules whereas β-BiBr3 is polymeric and adopts the AlCl3 structure. BiBr3 is the only group 15 trihalide that can adopt both molecular and polymeric structures. Reactivity Bismuth bromide is highly water-soluble. It is a Lewis acid A Lewis acid (named for the American physical chemist Gilbert N. Lewis) is a chemical species that cont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Aluminium Tribromide
Aluminium bromide is any chemical compound with the empirical formula AlBrx. Aluminium tribromide is the most common form of aluminium bromide. It is a colorless, sublimable hygroscopic solid; hence old samples tend to be hydrated, mostly as aluminium tribromide hexahydrate (AlBr3·6H2O). Structure The dimeric form of aluminium tribromide (Al2Br6) predominates in the solid state, in solutions in noncoordinating solvents (e.g. CS2), in the melt, and in the gas phase. Only at high temperatures do these dimers break up into monomers: : Al2Br6 → 2 AlBr3 ΔH°diss = 59 kJ/mol The species aluminium monobromide forms from the reaction of HBr with Al metal at high temperature. It disproportionates near room temperature: :6/n " lBrsub>n" → Al2Br6 + 4 Al This reaction is reversed at temperatures higher than 1000 °C. Aluminium monobromide has been crystallographically characterized in the form the tetrameric adduct Al4Br4(NEt3)4 (Et = C2H5). This species is electronica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Tetrabutylammonium Tribromide
Tetrabutylammonium tribromide, abbreviated to TBATB, is a pale orange solid with the formula (C4H9)4r3. It is a salt of the lipophilic tetrabutylammonium cation and the linear tribromide anion. The salt is sometimes used as a reagent used in organic synthesis as a conveniently weighable, solid source of bromine. Preparation The compound is prepared by treatment of solid tetra-''n''-butylammonium bromide with bromine vapor: : (C4H9)4r + Br2 → (C4H9)4r3 Instead of bromine, tetra-''n''-butylammonium bromide can also be reacted with vanadium pentoxide and aqueous hydrogen peroxide, or alternatively with ceric ammonium nitrate Ceric ammonium nitrate (CAN) is the inorganic compound with the formula . This orange-red, water-soluble cerium salt is a specialised oxidizing agent in organic synthesis and a standard oxidant in quantitative analysis. Preparation, properties, .... See also * Tribromide * Tetrabutylammonium triiodide References Reagents for organic chemi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Phosphorus Heptabromide
Phosphorus heptabromide is an inorganic compound with the chemical formula . It is one of the phosphorus bromides. At normal conditions, it forms red prismatic crystals. can be prepared by the sublimation of a mixture of phosphorus pentabromide and bromine. : The structure of consists of a tetrabromophosphonium cation , paired with a tribromide anion An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by conven ... , and the tribromide anion is non-symmetric. See also * Phosphorus tribromide * Phosphorus pentabromide References Phosphorus bromides Polyhalides Quaternary phosphonium compounds {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Pyridinium Perbromide
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 (Br2). The chemical is a solid whose reactivity is similar to that of bromine. It is thus a strong oxidizing agent used as a source of electrophilic bromine in halogenation reactions. The analogous quinoline compound behaves similarly. Preparation Pyridinium tribromide can be obtained by reacting pyridinium bromide with bromine or thionyl bromide. Properties Pyridinium tribromide is a red crystalline solid which is virtually insoluble in water. Use Pyridinium tribromide is used as a brominating agent of ketones, phenols, and ethers In organic chemistry, ethers are a class of compounds that contain an ether group, a single oxygen ato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Antimony Tribromide
Antimony tribromide ( Sb Br3) is a chemical compound containing antimony in its +3 oxidation state. Production Antimony tribromide may be made by the reaction of antimony with elemental bromine, or by the reaction of antimony trioxide with hydrobromic acid. Alternatively, it can be prepared by the action of bromine on a mixture of antimony sulfide and antimony trioxide at 250 °C. Chemical properties Antimony tribromide has two crystalline forms, both having orthorhombic symmetries. When a warm carbon disulfide solution of SbBr3 is rapidly cooled, it crystallizes into the needle-like α-SbBr3, which then slowly converts to the more stable β form. Antimony tribromide hydrolyzes in water to form hydrobromic acid and antimony trioxide: : 2 SbBr3 + 3 H2O → Sb2O3 + 6 HBr Uses It can be added to polymers such as polyethylene as a fire retardant. It is also used in the production of other antimony compounds, in chemical analysis, as a mordant A mordant or dye fixative is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
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 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 ligand In coordination chemistry, a ligand is an ion or molecule with a functional group that binds to a central metal atom to form a coordination complex. The bonding with the metal generally involves formal donation of one or more of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Americium Tribromide
Americium(III) bromide or americium tribromide is the chemical compound composed of americium and bromine with the formula In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwe ... AmBr3, with americium in a +3 oxidation state. The compound is a crystalline solid. References Americium compounds Bromides Actinide halides {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Einsteinium Tribromide
Einsteinium(III) bromide is the bromide salt of einsteinium. It has a monoclinic In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three Vector (geometric), vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in t ... crystal structure and is used to create einsteinium(II) bromide. This compound slowly decays to californium(III) bromide. References Einsteinium compounds bromides Actinide halides {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
