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・ Phosphorus halide
・ Phosphorus heptabromide
・ Phosphorus iodide
・ Phosphorus mononitride
・ Phosphorus nitride
・ Phosphorus oxide
・ Phosphorus pentabromide
・ Phosphorus pentachloride
・ Phosphorus pentafluoride
・ Phosphorus pentaiodide
・ Phosphorus pentasulfide
・ Phosphorus pentoxide
・ Phosphorus selenide
・ Phosphorus sesquisulfide
・ Phosphorus sulfide
Phosphorus tribromide
・ Phosphorus tribromide (data page)
・ Phosphorus trichloride
・ Phosphorus trichloride (data page)
・ Phosphorus trifluoride
・ Phosphorus trifluoride (data page)
・ Phosphorus triiodide
・ Phosphorus triiodide (data page)
・ Phosphorus trioxide
・ Phosphorus trisulfide
・ Phosphorus-31 nuclear magnetic resonance
・ Phosphorus-32
・ Phosphoryl bromide
・ Phosphoryl chloride
・ Phosphoryl chloride (data page)


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Phosphorus tribromide : ウィキペディア英語版
Phosphorus tribromide

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Phosphorus tribromide is a colourless liquid with the formula PBr3. It is a colourless liquid that 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:〔J. F. Gay, R. N. Maxson
"Phosphorus(III) Bromide" Inorganic Syntheses, 1947, vol. 2, 147ff. 〕
:P4 + 6 Br2 → 4 PBr3
Because the reaction is highly exothermic, it is often conducted in the presence of a diluent such as PBr3.

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