Bromination of Ethylene
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C2H4 + Br2 → C2H4Br2
概述
Ethylene reacts with bromine in an electrophilic addition reaction to form 1,2-dibromoethane. The brown color of bromine water is decolorized instantly, making this the classic qualitative test for unsaturation (C=C double bonds). The mechanism involves a cyclic bromonium ion intermediate.
参与者
日常示例
The bromine water test for alkenes is one of the most dramatic color-change tests in organic chemistry: brown instantly becomes colorless.
工业重要性
1,2-二溴乙烷历史上用作含铅汽油中的铅清除剂,现已成为重要的化学中间体。
属性
- 类型
- Organic
- 可逆
- 否
- 能量
- 放热
- ΔH
- -121.0 kJ/mol
相关反应
Epoxidation of Alkenes (mCPBA)
Swern Oxidation
Oxidation of Secondary Alcohol to Ketone
E2 Elimination (Dehydrohalogenation)
Claisen Condensation (Ethyl Acetate)
Aldol Condensation of Acetaldehyde
Kolbe Electrolysis
Baeyer-Villiger Oxidation
Beckmann Rearrangement (Cyclohexanone Oxime)
Dehydration of Ethanol
Frequently Asked Questions
What is the equation for Bromination of Ethylene?
The balanced equation is: C₂H₄ + Br₂ → C₂H₄Br₂.
What type of reaction is Bromination of Ethylene?
Bromination of Ethylene is a organic reaction.
Is Bromination of Ethylene exothermic or endothermic?
Bromination of Ethylene is exothermic (releases energy). The enthalpy change (ΔH) is -121.0 kJ/mol.