Bismuth tribromide

Bismuth tribromide is an inorganic compound with the chemical formula BiBr₃. It is a yellow crystalline solid that is used in various chemical reactions and applications.

Structure and Properties

Bismuth tribromide is composed of one bismuth atom and three bromine atoms. It crystallizes in a layered structure, similar to that of bismuth trichloride. The compound is known for its high density and relatively high melting and boiling points.

Synthesis

Bismuth tribromide can be synthesized by the direct reaction of elemental bismuth with bromine:

<math>\text{2 Bi} + \text{3 Br}_2 \rightarrow \text{2 BiBr}_3</math>

This reaction is typically carried out in a controlled environment to prevent the formation of unwanted byproducts.

Reactions

Bismuth tribromide reacts with water to form bismuth oxybromide and hydrobromic acid:

<math>\text{BiBr}_3 + \text{H}_2\text{O} \rightarrow \text{BiOBr} + \text{2 HBr}</math>

It can also react with other halides and is used in halogen exchange reactions.

Applications

Bismuth tribromide is used in organic synthesis as a catalyst and reagent. It is also used in the preparation of other bismuth compounds and in some specialized industrial processes.

Safety

Bismuth tribromide should be handled with care, as it reacts with moisture to release hydrobromic acid, which is corrosive. Proper safety equipment, such as gloves and goggles, should be used when handling this compound.

Also see

• Bismuth trichloride
• Bismuth compounds
• Halides
• Inorganic chemistry