Iodine monobromide is an

interhalogen compound In chemistry, an interhalogen compound is a molecule which contains two or more different halogen atoms ( fluorine, chlorine, bromine, iodine, or astatine) and no atoms of elements from any other group. Most interhalogen compounds known are b ...

with the chemical symbol IBr. It is a dark red solid that melts near room temperature. Like

iodine monochloride Iodine monochloride is an interhalogen compound with the formula . It is a red-brown chemical compound that melts near room temperature. Because of the difference in the electronegativity of iodine and chlorine, this molecule is highly polar an ...

, IBr is used in some types of iodometry. It serves as a source of I⁺. Its Lewis acid properties are compared with those of ICl and I₂ in the ECW model. It can form CT adducts with Lewis donors.

Synthesis

Iodine monobromide is formed when iodine and

bromine Bromine is a chemical element with the symbol Br and atomic number 35. It is the third-lightest element in group 17 of the periodic table ( halogens) and is a volatile red-brown liquid at room temperature that evaporates readily to form a simi ...

are combined in a chemical reaction: :I₂ + Br₂ → 2 IBr :

References

Iodine compounds Interhalogen compounds Diatomic molecules Bromides {{inorganic-compound-stub