Properties | More Info | Isotopes | Allotropes | Spectra
Compounds | Reactions | Production
Atomic: M.A.C. | Reference
Diagrams: Shell | Atomic Radius | Electron || Images
Reactions of Boron
Reactions with water
Boron will not react with water under normal conditions.
Reactions with air
At higher temperatures, boron does burn in air to form boron(III) oxide, B2O3.
  4B + 3O2(g)2B2O3(s)
Reactions with halogens
Boron reacts vigorously with fluorine, chlorine, and bromine to form boron(III) trihalides.
  2B(s) + 3F2(g)2BF3(g)
  2B(s) + 3Cl2(g)2BCl3(g)
  2B(s) + 3Br2(g)2BBr3(g)
Reactions with acids
Crystalline boron does not react with boiling hydrochloric acid (HCl) or boiling hydrofluoric acid (HF). Powdered boron oxidizes slowly when treated with concentrated nitric acid, HNO3.
 
Reduction Potentials
Balanced half-reaction E0 / V
H3BO3 + 3H+ + 3e-B(s) + 3H2O -0.869
H2BO3- + 4H+ + 3e-B(s) + 3H2O -0.687
HBO32- + 5H+ + 3e-B(s) + 3H2O -0.437
BO33- + 6H+ + 3e-B(s) + 3H2O -0.165
B(OH)3 + 3H+ + 3e-B(s) + 3H2O 0.87
BF4- + 3e-B(s) + 4F- -1.04
H2B4O7 + 12H+ + 12e-4B(s) + 7H2O -0.836
B4O72- + 14H+ + 12e-4B(s) + 7H2O -0.792