. The pH of the solution determines the position of the equilibrium.
Bromine is not reactive towards oxygen or nitrogen but it will react ozone at -78oC to form the unstable compound bromine(IV) oxide.
Bromine reacts with chlorine in the gas phase to form the interhalogen species BrF. The product is difficult to obtain pure since BrF disproportionates at room temperature to form bromine, Br2
, and BrF3
Br2(g) + F2(g) –> 2BrF(g)
3BrF(g) + Br2(l) –> BrF3(l)
5BrF(g) + 2Br2(l) –> BrF5(l)
Under more forceful conditions, excess fluorine reacts with bromine at 150oC to form the interhalogen species BrF5.
Br2(l) + 5F2(g) –> 2BrF5(l)
Chlorine reacts with bromine in the gas phase to form the unstable interhalogen species bromine(I) chloride, ClBr.
Cl2(g) + Br2(g) –> 2ClBr(l)
Bromine reacts with iodine at room temperature to form the interhalogen species bromine(I) iodide, BrI.
Br2(l) + I2(s) –> 2IBr(s)
Reactions with bases
Bromine reacts with hot aqueous alkali to produce bromate. Only one sixth of the total bromine is converted in this reaction.
3Br2(g) + 6OH–(aq) –> BrO3–(aq) + 5Br–(aq) + 3H2O