Question

C2H4+Br2- решение помогите

Answer 1

C2H4+Br2 = C2H4Br2 - дибромэтан

 

 

Answer 2

C2H4 + Br2 Reaction

The reaction between C2H4 (ethylene) and Br2 (bromine) is a substitution reaction that results in the formation of 1,2-dibromoethane (C2H4Br2). This reaction is commonly known as bromination of ethylene.

The balanced chemical equation for the reaction is as follows:

C2H4 + Br2 → C2H4Br2

In this reaction, one molecule of ethylene reacts with one molecule of bromine to produce one molecule of 1,2-dibromoethane.

Reaction Mechanism

The reaction mechanism for the bromination of ethylene involves the following steps:

1. Initiation: The reaction is initiated by the homolytic cleavage of the Br-Br bond in bromine molecules, resulting in the formation of two bromine radicals (Br•).

2. Propagation: In the propagation step, one bromine radical reacts with an ethylene molecule to form a bromoethyl radical (C2H4Br•). This radical then reacts with another bromine molecule to form 1,2-dibromoethane (C2H4Br2) and regenerate the bromine radical. The overall reaction is repeated in a chain reaction fashion.

3. Termination: The reaction terminates when the radicals combine to form stable molecules, such as ethylene (C2H4) or bromine (Br2).

Reaction Conditions

The bromination of ethylene typically requires the presence of a catalyst, such as iron (Fe) or aluminum chloride (AlCl3), to facilitate the reaction. The reaction is usually carried out at room temperature or slightly elevated temperatures.

Conclusion

In summary, the reaction between C2H4 and Br2 results in the formation of 1,2-dibromoethane. The reaction proceeds through a radical mechanism and is typically catalyzed by substances like iron or aluminum chloride. The reaction conditions are usually at room temperature or slightly elevated temperatures.

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