Английская Википедия:Bismuth tribromide

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Шаблон:Chembox

Bismuth tribromide is an inorganic compound of bismuth and bromine with the chemical formula BiBr3.

Preparation

It may be formed by the reaction of bismuth oxide and hydrobromic acid.[1]

Шаблон:Chem2

Bismuth tribromide can also be produced by the direct oxidation of bismuth in bromine.[1]

Шаблон:Chem2

Structure

Bismuth tribromide adopts two different structures in the solid state: a low-temperature polymorph α-BiBr3 that is stable below 158 °C and a high-temperature polymorph β-BiBr3 that is stable above this temperature. Both polymorphs are monoclinic, but α-BiBr3 is in space group P21/a whereas β-BiBr3 is in C2/m. α-BiBr3 consists of pyramidal molecules whereas β-BiBr3 is polymeric and adopts the AlCl3 structure. BiBr3 is the only group 15 trihalide that can adopt both molecular and polymeric structures.[2]

Reactivity

Bismuth bromide is highly water-soluble. It is a Lewis acid and accepts bromide ions to form monomeric and oligomeric anionic complexes (bromobismuthates), e.g. [BiBr6]3−, [Bi2Br10]4−, (Шаблон:Chem)n and (Шаблон:Chem)n.[3]

References

Шаблон:Reflist

Шаблон:Bismuth compounds Шаблон:Bromides

  1. 1,0 1,1 Ошибка цитирования Неверный тег <ref>; для сносок G&E не указан текст
  2. Шаблон:Cite journal
  3. Шаблон:Greenwood&Earnshaw2nd