Pentachloride tetrabromides

Uranium pentabromide [13775-16-1], UBr, is unstable toward reduction and the pentaiodide is unknown. Two synthetic methods utilized for the production of UBr involve the oxidation of uranium tetrabromide [13470-20-7], UBr, by Br2 or by bromination of uranium turnings with Br2 in acetonitrile. The metastable pentabromide is isostmctural with the pentachloride, being dimeric with edge-sharing octahedra U2Br2Q. 

Silver difluoride, 0014 Silver fluoride, 0013 Sodium chloride, 4036 Sodium iodide, 4623 Tantalum pentachloride, 4185 Tellurium tetrabromide, 0296 Thallium, 4922 Tin(II) chloride, 4116 Tin(IV) chloride, 4174 Tin(II) fluoride, 4331 Titanium(II) chloride, 4117 Titanium dibromide, 0284 Titanium diiodide, 4630 Titanium tetrachloride, 4176 Titanium tetraiodide, 4638 Titanium trichloride, 4158... 

However, when the pentachloride is heated with hydrocarbons, a beta-form of M0CI4 forms. The product always is contaminated with carbon. Heating the pentachloride with molybdenum metal forms the same beta-MoCR. Reaction with hydrogen bromide yields molybdenum tetrabromide. 

Uranium forms two stable fluorides, UF4 and UFe. When metal is heated with fluorine gas, hexafluoride, UFe, is produced. Heating powdered metal with hydrogen fluoride gas at 350°C yields tetrafluoride, UF4. Powdered metal is obtained by thermal decomposition of trihydride, UH3. Uranium combines with chlorine at elevated temperature (at about 500°C) to form a mixture of various chlorides namely, the tetrachloride, UCI4, pentachloride, UCI5, and hexachloride,UCl6. Heating the metal with bromine vapor at 650°C forms tetrabromide, UBr4. Uranium also forms tri-and pentabromides. With... 

Acetylene Tetrabromide 79-27-6 Ammonium Bichromate 7789-09-5 Antimony Pentachloride 7647-18-9... 

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