Hydrohalogenation

A hydrohalogenation reaction is the electrophilic addition of hydrohalic acids like hydrogen chloride or hydrogen bromide to alkenes to yield the corresponding haloalkanes.

If the two carbon atoms at the double bond are linked to a different number of hydrogen atoms, the halogen is found preferentially at the carbon with fewer hydrogen substituents, an observation known as Markovnikov's rule. This is due to the abstraction of a hydrogen atom by the alkene from the acid (HX) to form the most stable carbocation(relative stability: 3°>2°>1°>methyl), as well as generating a halogen anion.

单词	hydrobromination
释义	hydrobromination 英汉-汉英词典 n. 溴氢化作用词组 \| 习惯用语您要查找的是不是： predetermination n. 预先决定；原有意图 hydrogenation n. 氢化作用 interdenominational adj. 派系间的 redetermination n. 重新决定,再决定 hydrobromination 溴氢化作用英语百科 Hydrohalogenation A hydrohalogenation reaction is the electrophilic addition of hydrohalic acids like hydrogen chloride or hydrogen bromide to alkenes to yield the corresponding haloalkanes. If the two carbon atoms at the double bond are linked to a different number of hydrogen atoms, the halogen is found preferentially at the carbon with fewer hydrogen substituents, an observation known as Markovnikov's rule. This is due to the abstraction of a hydrogen atom by the alkene from the acid (HX) to form the most stable carbocation(relative stability: 3°>2°>1°>methyl), as well as generating a halogen anion.
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hydrobromination

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Hydrohalogenation