Question

How is bromoethane prepared from ethanol?

Answer 1

Explanation:

Bromoethane, also known as ethyl bromide, is a chemical compound of the haloalkanes group. It is abbreviated by chemists as EtBr.

The preparation of EtBr stands as a model for the synthesis of bromoalkanes in general. It is usually prepared by the addition of HBr to ethene:

H2C=CH2 + HBr → H3C-CH2Br

Bromoethane is inexpensive and would rarely be prepared in the laboratory. A laboratory synthesis includes reacting ethanol with a mixture of hydrobromic and sulfuric acids. An alternate route involves refluxing ethanol with phosphorus and bromine; phosphorus tribromide is generated in situ.

Answer 2

Bromoethane ( CH$_{3}$CH$_{2}$Br ) can be prepared from ethanol ( CH$_{3}$CH$_{2}$OH )  by following step of reaction -

React ethanol with phosphorous tribromide ( PBr$_{3}$ ) , bromoethane is formed .

    CH$_{3}$CH$_{2}$OH +  PBr$_{3}$  →  CH$_{3}$CH$_{2}$Br

• Bromoethane is a volatile compound .
• Bromoethane has an ether like odour .
• The molar mass of bromoethane is 108.97 g/mol .
• Bromoethane is used as an anesthetic in medicine .