ChemicalBook CAS DataBase List Phosphorus tribromide

Phosphorus tribromide synthesis

8synthesis methods

Product Name:Phosphorus tribromide
CAS Number:7789-60-8
Molecular formula:Br3P
Molecular Weight:270.69

Phosphorus tribromide, PBr3, is most conveniently prepared by reaction between liquid bromine and a solution of white phosphorus in PBr3. In most of its reactions, the tribromide resembles the trichloride although the former has been much less studied and in some cases the products seem to be more complex.

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Yield:7789-60-8 42%

Reaction Conditions:

in neat (no solvent);byproducts: Et4NIBr2; argon atmosphere; org. compd. addn. to PBr5 (cooling to -20°C), reaction vessel connecting to vac. line; PBr3 collection (trap cooled with liq. nitrogen);

References:

Vengel'nikova, V. N.;Timokhin, B. V.;Kalabina, A. V.;Donskikh, V. I. [Journal of general chemistry of the USSR,1982,vol. 52,p. 1160 - 1163][J.Gen.Chem.USSR (Engl.Transl.),1982,vol. 52,p. 1318 - 1322]