Hydrogen compounds: hydrogen bromide
The hydrogen in hydrogen bromide formally is in the oxidation state 1.
Hydrogen bromide gas can be made in the laboratory by the bromination of tetralin (1,2,3,4-tetrahydronapthalene). The downside is that half of the bromine is lost. The yield is about 94% (that is, 47% of the bromine ends up as HBr).
C10H12 + 4Br2 → C10H8Br4 + 4HBr
Hydrogen bromide gas may also be made in the laboratory by the reaction of concentrated sulphuric acid upon sodium bromide. However, a lot of the product is lost by oxidation with excess sulphuric acid to form bromine and sulphur dioxide.
NaBr(s) + H2SO4 → HBr(g) + NaHSO4(s)
Hydrogen bromide may be made in the laboratory by the reaction between purified hydrogen gas and bromine. This is catalyzed by platinized asbestos and carried out in a quartz tube at 250°C.
Br2 + H2 [Pt] → 2HBr
Solid state structure
What follows is the calculated isotope pattern for the HBr unit with the most intense ion set to 100%.
mass % 80 100.0 __________________________________________________
The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.
WebElements now has a WebElements shop at which you can buy periodic table posters, mugs, T-shirts, games, molecular models, and more.